{ "types" : { "Bookmark" : { "pluralLabel" : "Bookmarks" }, "Publication" : { "pluralLabel" : "Publications" }, "GoldStandardPublication" : { "pluralLabel" : "GoldStandardPublications" }, "GoldStandardBookmark" : { "pluralLabel" : "GoldStandardBookmarks" }, "Tag" : { "pluralLabel" : "Tags" }, "User" : { "pluralLabel" : "Users" }, "Group" : { "pluralLabel" : "Groups" }, "Sphere" : { "pluralLabel" : "Spheres" } }, "properties" : { "count" : { "valueType" : "number" }, "date" : { "valueType" : "date" }, "changeDate" : { "valueType" : "date" }, "url" : { "valueType" : "url" }, "id" : { "valueType" : "url" }, "tags" : { "valueType" : "item" }, "user" : { "valueType" : "item" } }, "items" : [ { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25767125e082a2e256cf94d3f9c3c7f17/huebleriac", "tags" : [ "UV","absorption","cation","cation;transition","cation;vibrational","dialkyldihydrodiazinium","dimerization","electronic","pi","radical","stable","structure" ], "intraHash" : "5767125e082a2e256cf94d3f9c3c7f17", "interHash" : "c3770b0d4c17884f0f9441d6617c2013", "label" : "Electronic absorption spectroscopy of some exceptionally stable 1,4-dialkyl-1,4-dihydro-1,4-diazinium radical cations: Assignment of transitions, vibrational structure and effects of p-p dimerization", "user" : "huebleriac", "description" : "", "date" : "2022-06-15 11:26:56", "changeDate" : "2022-06-15 09:26:56", "count" : 3, "pub-type": "article", "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry", "year": "1994", "url": "", "author": [ "Frank Hilgers","Wolfgang Kaim","Andreas Schulz","Stanislav. Zalis" ], "authors": [ {"first" : "Frank", "last" : "Hilgers"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Andreas", "last" : "Schulz"}, {"first" : "Stanislav.", "last" : "Zalis"} ], "number": "1","pages": "135--138","abstract": "UV-VIS Absorption spectroscopy of the unusually stable and structurally characterized radical cations 1,4-diethyl-1,4-dihydropyrazinium (1.bul.+), 1,4-diethyl-1,4-dihydroquinoxalinium monomer (2.bul.+) and p-p dimer [(2.bul.+)2], 1,4,6,7-tetramethyl-1,4-dihydroquinoxalinium (3.bul.+) and 5,10-diethyl-5,10-dihydrophenazinium (4.bul.+) reveals low-energy p$\\rightarrow$p* transitions with different intensities and partial vibrational structuring. The spectra of the radical cations and of the corresponding dications (12+-42+) have been analyzed with the help of INDO/S calcns.; the resulting assignments could also be rationalized using HMO theory. Both higher sym. systems 1.bul.+ and 4.bul.+ exhibit vibrationally split long-wavelength bands. The addnl. long-wavelength absorption of the p-p dimer (1.bul.+)22 (KD ca. 4 $\\times$ 103) is assigned to a charge transfer transition, similar to that of methylviologen radical dimer. [on SciFinder(R)]", "issn" : "0300-9580", "bibtexKey": "Hilgers.1994" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/233a97ea54c33b07454ceaa6bb41c4946/huebleriac", "tags" : [ "ESR","aluminum","coordination","crystallog","neutral","radical","sphere","stable" ], "intraHash" : "33a97ea54c33b07454ceaa6bb41c4946", "interHash" : "84ffa8e2f3d3f81f14fca5ee9df1c32e", "label" : "A Stable Neutral Radical in the Coordination Sphere of Aluminum", "user" : "huebleriac", "description" : "", "date" : "2022-06-15 11:26:56", "changeDate" : "2022-06-15 09:26:56", "count" : 3, "pub-type": "article", "journal": "Angewandte Chemie, International Edition", "year": "2017", "url": "", "author": [ "Bin Li","Subrata Kundu","A. Claudia Stueckl","Hongping Zhu","Helena Keil","Regine Herbst-Irmer","Dietmar Stalke","Brigitte Schwederski","Wolfgang Kaim","Diego M. Andrada","Gernot Frenking","Herbert W. Roesky" ], "authors": [ {"first" : "Bin", "last" : "Li"}, {"first" : "Subrata", "last" : "Kundu"}, {"first" : "A. Claudia", "last" : "Stueckl"}, {"first" : "Hongping", "last" : "Zhu"}, {"first" : "Helena", "last" : "Keil"}, {"first" : "Regine", "last" : "Herbst-Irmer"}, {"first" : "Dietmar", "last" : "Stalke"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Diego M.", "last" : "Andrada"}, {"first" : "Gernot", "last" : "Frenking"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "56","number": "1","pages": "397--400","abstract": "The neutral radical (Me2-cAAC)2AlCl2 (2) is stabilized by cyclic (alkyl)(amino)carbenes (cAACs). Complex 2 was synthesized by redn. of the Me2-cAAC:$\\rightarrow$AlCl3 (1) adduct with KC8 in the presence of another equiv. of Me2-cAAC. The crystal structure of 2 shows that the Al-C bond lengths of the two carbenes bound to the Al center are considerably different, which is likely the result of intermol. interactions. Quantum-chem. calcns. from the gas phase give an equil. structure with identical Al-C bond lengths. Compd. 2 exhibits monoradical character, which was confirmed by EPR measurements. A bonding anal. indicates that the unpaired electron resides mainly at the carbene carbon atoms. Compd. 2 is an example for an unusual neutral Al radical. [on SciFinder(R)]", "issn" : "1433-7851", "doi" : "10.1002/anie.201609101", "bibtexKey": "Li.2017" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25709597807d8b2aefd53359b67e5669a/huebleriac", "tags" : [ "diphenylchlorophosphine","radical","stable","trichlorosilane" ], "intraHash" : "5709597807d8b2aefd53359b67e5669a", "interHash" : "e7d5a81fc40bd961e58cd5b7cd2d1bda", "label" : "Stable Radicals from Commonly Used Precursors Trichlorosilane and Diphenylchlorophosphine", "user" : "huebleriac", "description" : "", "date" : "2022-06-15 11:26:56", "changeDate" : "2022-06-15 09:26:56", "count" : 3, "pub-type": "article", "journal": "Journal of the American Chemical Society", "year": "2015", "url": "", "author": [ "Sudipta Roy","A. Claudia Stueckl","Serhiy Demeshko","Birger Dittrich","Jann Meyer","Bholanath Maity","Debasis Koley","Brigitte Schwederski","Wolfgang Kaim","Herbert W. Roesky" ], "authors": [ {"first" : "Sudipta", "last" : "Roy"}, {"first" : "A. Claudia", "last" : "Stueckl"}, {"first" : "Serhiy", "last" : "Demeshko"}, {"first" : "Birger", "last" : "Dittrich"}, {"first" : "Jann", "last" : "Meyer"}, {"first" : "Bholanath", "last" : "Maity"}, {"first" : "Debasis", "last" : "Koley"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "137","number": "14","pages": "4670--4673","abstract": "Intermediate species dichlorosilylene was generated in situ from trichlorosilane and inserted into the P-Cl bond of diphenylchlorophosphine (Ph2P-Cl) to obtain Ph2P-SiCl3 (1). Monodechlorination of 1 by cyclic alkyl(amino) carbenes (cAACs)/KC8 in THF at low temp. led to the formation of stable radicals Ph2P-Si(cAAC·)Cl2 (2a,b). Compds. 2a,b were characterized by X-ray single crystal diffraction, mass spectrometry and studied by cyclic voltammetry and theor. calcns. Radical properties of 2 are confirmed by EPR measurements that suggest the radical electron in 2 couples with 14N (I = 1), 35/37Cl (I = 3/2), and 31P (I = 1/2) nuclei leading to multiple hyperfine lines. Hyperfine coupling parameters computed from DFT calcns. are in good agreement with those of exptl. values. Electronic distributions obtained from the theor. calcns. suggest that the radical electron mostly resides on the carbene C of 2. [on SciFinder(R)]", "issn" : "0002-7863", "doi" : "10.1021/jacs.5b02403", "bibtexKey": "Roy.2015b" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/21276e2ab81aa7eb899c7fe45d4d555d7/huebleriac", "tags" : [ "air","cation","cumulene","dication","radical","stable" ], "intraHash" : "1276e2ab81aa7eb899c7fe45d4d555d7", "interHash" : "f9b513e0e90c9725330acac26abe4638", "label" : "C4 Cumulene and the Corresponding Air-Stable Radical Cation and Dication", "user" : "huebleriac", "description" : "", "date" : "2022-06-15 11:26:56", "changeDate" : "2022-06-15 09:26:56", "count" : 3, "pub-type": "article", "journal": "Angewandte Chemie, International Edition", "year": "2014", "url": "", "author": [ "Yan Li","Kartik Chandra Mondal","Prinson P. Samuel","Hongping Zhu","Claudia M. Orben","Saravanan Panneerselvam","Birger Dittrich","Brigitte Schwederski","Wolfgang Kaim","Totan Mondal","Debasis Koley","Herbert W. Roesky" ], "authors": [ {"first" : "Yan", "last" : "Li"}, {"first" : "Kartik Chandra", "last" : "Mondal"}, {"first" : "Prinson P.", "last" : "Samuel"}, {"first" : "Hongping", "last" : "Zhu"}, {"first" : "Claudia M.", "last" : "Orben"}, {"first" : "Saravanan", "last" : "Panneerselvam"}, {"first" : "Birger", "last" : "Dittrich"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Totan", "last" : "Mondal"}, {"first" : "Debasis", "last" : "Koley"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "53","number": "16","pages": "4168--4172","abstract": "A neutral C4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1.+, and dication 12+ have been synthesized. The redox property of 1.+ was studied by cyclic voltammetry. EPR and theor. calcns. show that the unpaired electron in 1.+ is mainly delocalized over the central C4 backbone. The com. available CBr4 is utilized as a source of dicarbon in the cumulene synthesis. [on SciFinder(R)]", "issn" : "1433-7851", "doi" : "10.1002/anie.201310975", "bibtexKey": "Li.2014" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2e60562648ed6280a92f3b4ce06c07f90/huebleriac", "tags" : [ "ENDOR","ESR","ESR;titanium","complex","dicarbonyl","donor;semiquinone","electron","methyltriisopropoxytitanium;diimine","methyltriisopropoxytitanium;ketone","methyltriisopropoxytitanium;methyltriisopropoxytitanium","prepn","radical","single","stable","titanium","transfer" ], "intraHash" : "e60562648ed6280a92f3b4ce06c07f90", "interHash" : "5efee7c4ab383bb0c2eea5c54716beb3", "label" : "EPR/ENDOR detection of stable titanium(III) and titanium(IV) radical products generated by single electron transfer from (iso-PrO)3TiCH3", "user" : "huebleriac", "description" : "", "date" : "2022-06-15 11:26:56", "changeDate" : "2022-06-15 09:26:56", "count" : 3, "pub-type": "article", "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry", "year": "1992", "url": "", "author": [ "Michael Moscherosch","Wolfgang. Kaim" ], "authors": [ {"first" : "Michael", "last" : "Moscherosch"}, {"first" : "Wolfgang.", "last" : "Kaim"} ], "number": "9","pages": "1493--1496","abstract": "Single-electron-transfer reactions between the stereoselective carbanion source methyltriisopropoxytitanium(IV) as donor and a-diimines, ketones, or a-dicarbonyls as p acceptor substrates exhibit a dichotomy with respect to the ESR-detectable paramagnetic 'escape' products. Substrates with very neg. redn. potentials such as 2,2'-bipyridine yield Ti(III) species, whereas more easily reducible mols. such as dinucleating 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine react to yield ESR-detectable Ti(IV) complexes of the corresponding anion radicals. A very stable paramagnetic product was isolated from the reaction between 3,5-di-tert-butyl-o-quinone (dtbq) and (Me2CHO)3TiMe; this first thermally stable, but apparently configurationally labile, Ti(IV) semiquinone complex [(dtbq-1)Ti(OCHMe2)3].bul. was studied by UV-VIS-NIR absorption and ESR/ENDOR spectroscopy. [on SciFinder(R)]", "issn" : "0300-9580", "bibtexKey": "Moscherosch.1992" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/292d088fed749004a11d1ba7fa3b982fc/annettegugel", "tags" : [ "Criterion.","Evaluating","Impedance-Based","Inverters","Method","New","Operation","Phase","Planning","Stability","Stable","for","in","of","the","using" ], "intraHash" : "92d088fed749004a11d1ba7fa3b982fc", "interHash" : "549c634c9d60667aaf96c3c7b3c85362", "label" : "New Method for Evaluating the Stable Operation of Inverters in the Planning Phase using Impedance-Based Stability Criterion.", "user" : "annettegugel", "description" : "", "date" : "2022-02-14 13:43:12", "changeDate" : "2022-02-14 12:43:12", "count" : 3, "pub-type": "conference", "year": "2021", "url": "", "author": [ "Matthias Buchner","Krzysztof Rudion" ], "authors": [ {"first" : "Matthias", "last" : "Buchner"}, {"first" : "Krzysztof", "last" : "Rudion"} ], "eventtitle" : "26th International Conference & Exhibition on Electricity Distribution - CIRED", "venue" : "Genf, Switzerland, Online", "eventdate" : "September 20-23", "bibtexKey": "buchner2021method" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2f95536bda701d0d91f57d570bbe7552b/itke", "tags" : [ "2007","architecture","from:petraheim","grid","helbig","knippers","shape","shell","smooth","stable" ], "intraHash" : "f95536bda701d0d91f57d570bbe7552b", "interHash" : "ee711b0855a246d1278977edc5ca50d7", "label" : "Smooth shapes and stable grids", "user" : "itke", "description" : "", "date" : "2020-05-22 14:24:43", "changeDate" : "2021-07-09 09:04:03", "count" : 2, "pub-type": "inproceedings", "booktitle": "IASS Symposium Shell and Spatial Structures: Structural Architecture \u2013 Towards the future looking to the past","address":"Venice, Italy", "year": "2007", "url": "", "author": [ "Jan Knippers","Thorsten Helbig" ], "authors": [ {"first" : "Jan", "last" : "Knippers"}, {"first" : "Thorsten", "last" : "Helbig"} ], "pages": "207 \u2013 208", "language" : "eng", "bibtexKey": "knippers2007smooth" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2f95536bda701d0d91f57d570bbe7552b/petraheim", "tags" : [ "2007","architecture","grid","helbig","knippers","shape","smooth","stable" ], "intraHash" : "f95536bda701d0d91f57d570bbe7552b", "interHash" : "ee711b0855a246d1278977edc5ca50d7", "label" : "Smooth shapes and stable grids", "user" : "petraheim", "description" : "", "date" : "2020-05-15 15:02:49", "changeDate" : "2020-06-02 10:11:30", "count" : 2, "pub-type": "inproceedings", "booktitle": "IASS Symposium Shell and Spatial Structures: Structural Architecture \u2013 Towards the future looking to the past","address":"Venice, Italy", "year": "2007", "url": "", "author": [ "Jan Knippers","Thorsten Helbig" ], "authors": [ {"first" : "Jan", "last" : "Knippers"}, {"first" : "Thorsten", "last" : "Helbig"} ], "pages": "207 \u2013 208", "language" : "eng", "bibtexKey": "knippers2007smooth" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/2e60562648ed6280a92f3b4ce06c07f90/b_schwederski", "tags" : [ "ENDOR","ESR","ESR;titanium","complex","dicarbonyl","donor;semiquinone","electron","methyltriisopropoxytitanium;diimine","methyltriisopropoxytitanium;ketone","methyltriisopropoxytitanium;methyltriisopropoxytitanium","prepn","radical","single","stable","titanium","transfer" ], "intraHash" : "e60562648ed6280a92f3b4ce06c07f90", "interHash" : "5efee7c4ab383bb0c2eea5c54716beb3", "label" : "EPR/ENDOR detection of stable titanium(III) and titanium(IV) radical products generated by single electron transfer from (iso-PrO)3TiCH3", "user" : "b_schwederski", "description" : "", "date" : "2019-07-15 13:41:23", "changeDate" : "2019-07-15 11:42:10", "count" : 3, "pub-type": "article", "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry", "year": "1992", "url": "", "author": [ "Michael Moscherosch","Wolfgang. Kaim" ], "authors": [ {"first" : "Michael", "last" : "Moscherosch"}, {"first" : "Wolfgang.", "last" : "Kaim"} ], "number": "9","pages": "1493--1496","abstract": "Single-electron-transfer reactions between the stereoselective carbanion source methyltriisopropoxytitanium(IV) as donor and a-diimines, ketones, or a-dicarbonyls as p acceptor substrates exhibit a dichotomy with respect to the ESR-detectable paramagnetic 'escape' products. Substrates with very neg. redn. potentials such as 2,2'-bipyridine yield Ti(III) species, whereas more easily reducible mols. such as dinucleating 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine react to yield ESR-detectable Ti(IV) complexes of the corresponding anion radicals. A very stable paramagnetic product was isolated from the reaction between 3,5-di-tert-butyl-o-quinone (dtbq) and (Me2CHO)3TiMe; this first thermally stable, but apparently configurationally labile, Ti(IV) semiquinone complex [(dtbq-1)Ti(OCHMe2)3].bul. was studied by UV-VIS-NIR absorption and ESR/ENDOR spectroscopy. [on SciFinder(R)]", "issn" : "0300-9580", "bibtexKey": "Moscherosch.1992" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/21276e2ab81aa7eb899c7fe45d4d555d7/b_schwederski", "tags" : [ "air","cation","cumulene","dication","radical","stable" ], "intraHash" : "1276e2ab81aa7eb899c7fe45d4d555d7", "interHash" : "f9b513e0e90c9725330acac26abe4638", "label" : "C4 Cumulene and the Corresponding Air-Stable Radical Cation and Dication", "user" : "b_schwederski", "description" : "", "date" : "2019-07-15 13:41:23", "changeDate" : "2019-07-15 11:42:10", "count" : 3, "pub-type": "article", "journal": "Angewandte Chemie, International Edition", "year": "2014", "url": "", "author": [ "Yan Li","Kartik Chandra Mondal","Prinson P. Samuel","Hongping Zhu","Claudia M. Orben","Saravanan Panneerselvam","Birger Dittrich","Brigitte Schwederski","Wolfgang Kaim","Totan Mondal","Debasis Koley","Herbert W. Roesky" ], "authors": [ {"first" : "Yan", "last" : "Li"}, {"first" : "Kartik Chandra", "last" : "Mondal"}, {"first" : "Prinson P.", "last" : "Samuel"}, {"first" : "Hongping", "last" : "Zhu"}, {"first" : "Claudia M.", "last" : "Orben"}, {"first" : "Saravanan", "last" : "Panneerselvam"}, {"first" : "Birger", "last" : "Dittrich"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Totan", "last" : "Mondal"}, {"first" : "Debasis", "last" : "Koley"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "53","number": "16","pages": "4168--4172","abstract": "A neutral C4 cumulene 1 that includes a cyclic alkyl(amino) carbene (cAAC), its air-stable radical cation 1.+, and dication 12+ have been synthesized. The redox property of 1.+ was studied by cyclic voltammetry. EPR and theor. calcns. show that the unpaired electron in 1.+ is mainly delocalized over the central C4 backbone. The com. available CBr4 is utilized as a source of dicarbon in the cumulene synthesis. [on SciFinder(R)]", "issn" : "1433-7851", "doi" : "10.1002/anie.201310975", "bibtexKey": "Li.2014" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25709597807d8b2aefd53359b67e5669a/b_schwederski", "tags" : [ "diphenylchlorophosphine","radical","stable","trichlorosilane" ], "intraHash" : "5709597807d8b2aefd53359b67e5669a", "interHash" : "e7d5a81fc40bd961e58cd5b7cd2d1bda", "label" : "Stable Radicals from Commonly Used Precursors Trichlorosilane and Diphenylchlorophosphine", "user" : "b_schwederski", "description" : "", "date" : "2019-07-15 13:41:23", "changeDate" : "2019-07-15 11:42:10", "count" : 3, "pub-type": "article", "journal": "Journal of the American Chemical Society", "year": "2015", "url": "", "author": [ "Sudipta Roy","A. Claudia Stueckl","Serhiy Demeshko","Birger Dittrich","Jann Meyer","Bholanath Maity","Debasis Koley","Brigitte Schwederski","Wolfgang Kaim","Herbert W. Roesky" ], "authors": [ {"first" : "Sudipta", "last" : "Roy"}, {"first" : "A. Claudia", "last" : "Stueckl"}, {"first" : "Serhiy", "last" : "Demeshko"}, {"first" : "Birger", "last" : "Dittrich"}, {"first" : "Jann", "last" : "Meyer"}, {"first" : "Bholanath", "last" : "Maity"}, {"first" : "Debasis", "last" : "Koley"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "137","number": "14","pages": "4670--4673","abstract": "Intermediate species dichlorosilylene was generated in situ from trichlorosilane and inserted into the P-Cl bond of diphenylchlorophosphine (Ph2P-Cl) to obtain Ph2P-SiCl3 (1). Monodechlorination of 1 by cyclic alkyl(amino) carbenes (cAACs)/KC8 in THF at low temp. led to the formation of stable radicals Ph2P-Si(cAAC·)Cl2 (2a,b). Compds. 2a,b were characterized by X-ray single crystal diffraction, mass spectrometry and studied by cyclic voltammetry and theor. calcns. Radical properties of 2 are confirmed by EPR measurements that suggest the radical electron in 2 couples with 14N (I = 1), 35/37Cl (I = 3/2), and 31P (I = 1/2) nuclei leading to multiple hyperfine lines. Hyperfine coupling parameters computed from DFT calcns. are in good agreement with those of exptl. values. Electronic distributions obtained from the theor. calcns. suggest that the radical electron mostly resides on the carbene C of 2. [on SciFinder(R)]", "issn" : "0002-7863", "doi" : "10.1021/jacs.5b02403", "bibtexKey": "Roy.2015b" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/233a97ea54c33b07454ceaa6bb41c4946/b_schwederski", "tags" : [ "ESR","aluminum","coordination","crystallog","neutral","radical","sphere","stable" ], "intraHash" : "33a97ea54c33b07454ceaa6bb41c4946", "interHash" : "84ffa8e2f3d3f81f14fca5ee9df1c32e", "label" : "A Stable Neutral Radical in the Coordination Sphere of Aluminum", "user" : "b_schwederski", "description" : "", "date" : "2019-07-15 13:41:23", "changeDate" : "2019-07-15 11:42:10", "count" : 3, "pub-type": "article", "journal": "Angewandte Chemie, International Edition", "year": "2017", "url": "", "author": [ "Bin Li","Subrata Kundu","A. Claudia Stueckl","Hongping Zhu","Helena Keil","Regine Herbst-Irmer","Dietmar Stalke","Brigitte Schwederski","Wolfgang Kaim","Diego M. Andrada","Gernot Frenking","Herbert W. Roesky" ], "authors": [ {"first" : "Bin", "last" : "Li"}, {"first" : "Subrata", "last" : "Kundu"}, {"first" : "A. Claudia", "last" : "Stueckl"}, {"first" : "Hongping", "last" : "Zhu"}, {"first" : "Helena", "last" : "Keil"}, {"first" : "Regine", "last" : "Herbst-Irmer"}, {"first" : "Dietmar", "last" : "Stalke"}, {"first" : "Brigitte", "last" : "Schwederski"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Diego M.", "last" : "Andrada"}, {"first" : "Gernot", "last" : "Frenking"}, {"first" : "Herbert W.", "last" : "Roesky"} ], "volume": "56","number": "1","pages": "397--400","abstract": "The neutral radical (Me2-cAAC)2AlCl2 (2) is stabilized by cyclic (alkyl)(amino)carbenes (cAACs). Complex 2 was synthesized by redn. of the Me2-cAAC:$\\rightarrow$AlCl3 (1) adduct with KC8 in the presence of another equiv. of Me2-cAAC. The crystal structure of 2 shows that the Al-C bond lengths of the two carbenes bound to the Al center are considerably different, which is likely the result of intermol. interactions. Quantum-chem. calcns. from the gas phase give an equil. structure with identical Al-C bond lengths. Compd. 2 exhibits monoradical character, which was confirmed by EPR measurements. A bonding anal. indicates that the unpaired electron resides mainly at the carbene carbon atoms. Compd. 2 is an example for an unusual neutral Al radical. [on SciFinder(R)]", "issn" : "1433-7851", "doi" : "10.1002/anie.201609101", "bibtexKey": "Li.2017" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/25767125e082a2e256cf94d3f9c3c7f17/b_schwederski", "tags" : [ "UV","absorption","cation","cation;transition","cation;vibrational","dialkyldihydrodiazinium","dimerization","electronic","pi","radical","stable","structure" ], "intraHash" : "5767125e082a2e256cf94d3f9c3c7f17", "interHash" : "c3770b0d4c17884f0f9441d6617c2013", "label" : "Electronic absorption spectroscopy of some exceptionally stable 1,4-dialkyl-1,4-dihydro-1,4-diazinium radical cations: Assignment of transitions, vibrational structure and effects of p-p dimerization", "user" : "b_schwederski", "description" : "", "date" : "2019-07-15 13:41:23", "changeDate" : "2019-07-15 11:42:10", "count" : 3, "pub-type": "article", "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry", "year": "1994", "url": "", "author": [ "Frank Hilgers","Wolfgang Kaim","Andreas Schulz","Stanislav. Zalis" ], "authors": [ {"first" : "Frank", "last" : "Hilgers"}, {"first" : "Wolfgang", "last" : "Kaim"}, {"first" : "Andreas", "last" : "Schulz"}, {"first" : "Stanislav.", "last" : "Zalis"} ], "number": "1","pages": "135--138","abstract": "UV-VIS Absorption spectroscopy of the unusually stable and structurally characterized radical cations 1,4-diethyl-1,4-dihydropyrazinium (1.bul.+), 1,4-diethyl-1,4-dihydroquinoxalinium monomer (2.bul.+) and p-p dimer [(2.bul.+)2], 1,4,6,7-tetramethyl-1,4-dihydroquinoxalinium (3.bul.+) and 5,10-diethyl-5,10-dihydrophenazinium (4.bul.+) reveals low-energy p$\\rightarrow$p* transitions with different intensities and partial vibrational structuring. The spectra of the radical cations and of the corresponding dications (12+-42+) have been analyzed with the help of INDO/S calcns.; the resulting assignments could also be rationalized using HMO theory. Both higher sym. systems 1.bul.+ and 4.bul.+ exhibit vibrationally split long-wavelength bands. The addnl. long-wavelength absorption of the p-p dimer (1.bul.+)22 (KD ca. 4 $\\times$ 103) is assigned to a charge transfer transition, similar to that of methylviologen radical dimer. [on SciFinder(R)]", "issn" : "0300-9580", "bibtexKey": "Hilgers.1994" } , { "type" : "Publication", "id" : "https://puma.ub.uni-stuttgart.de/bibtex/23ccde260ffe43ddb2076ae3054e08037/markusstroppel", "tags" : [ "automorphism","group;","plane;","quasisimple}","stable","{topological" ], "intraHash" : "3ccde260ffe43ddb2076ae3054e08037", "interHash" : "a4c2f30a1daa7a2598a91a381a618875", "label" : "Achtdimensionale stabile Ebenen mit quasieinfacher Automorphismengruppe", "user" : "markusstroppel", "description" : "", "date" : "2018-02-16 19:54:49", "changeDate" : "2018-02-16 18:54:49", "count" : 1, "pub-type": "phdthesis", "address":"Tübingen", "year": "1991", "url": "http://elib.uni-stuttgart.de/opus/volltexte/2011/6233/", "author": [ "Markus Johannes Stroppel" ], "authors": [ {"first" : "Markus Johannes", "last" : "Stroppel"} ], "abstract": "A topological plane $\\bbfM$ is a triple $(M,M,I)$ of sets\r\n called ``points'', ``lines'', ``incidence relation'' such that\\par\r\n(i) any 2 points are incident with a unique line, and there exist three\r\n noncollinear points, and\\par\r\n(ii) $M$ and $M$ carry topologies such that joining and intersecting are\r\n continuous functions, and the domain of intersecting is open in $\\cal\r\n MM$.\\par\r\nIt can be shown that both $M$ and $M$ must be Hausdorff spaces [the\r\n reviewer, J. Comb. Theory, Ser. A 42, 111-125 (1986; Zbl 0596.51008),\r\n Propositions 4.2 and 4.13].\\par\r\nA stable plane is a topological plane which contains a quadrangle, and whose\r\n point space is locally compact and of positive, finite covering dimension:\r\n $0