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         "id"   : "https://puma.ub.uni-stuttgart.de/bibtex/25767125e082a2e256cf94d3f9c3c7f17/huebleriac",         
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            "UV","absorption","cation","cation;transition","cation;vibrational","dialkyldihydrodiazinium","dimerization","electronic","pi","radical","stable","structure"
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         "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",
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         "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry",
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         "author": [ 
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            	{"first" : "Andreas",	"last" : "Schulz"},
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         "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)]",
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         "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",
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         "date" : "2019-07-15 13:41:23",
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         "journal": "Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry",
         "year": "1994", 
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         "author": [ 
            "Frank Hilgers","Wolfgang Kaim","Andreas Schulz","Stanislav. Zalis"
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         "authors": [
         	
            	{"first" : "Frank",	"last" : "Hilgers"},
            	{"first" : "Wolfgang",	"last" : "Kaim"},
            	{"first" : "Andreas",	"last" : "Schulz"},
            	{"first" : "Stanislav.",	"last" : "Zalis"}
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         "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",
         
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