%0 Journal Article %1 Li.2019 %A Li, Wenling %A Kundu, Subrata %A Kohler, Christian %A Li, Jiancheng %A Dutta, Sayan %A Yang, Zhi %A Stalke, Dietmar %A Herbst-Irmer, Regine %A Stuckl, A. Claudia %A Schwederski, Brigitte %A Koley, Debasis %A Kaim, Wolfgang %A Roesky, Herbert W. %D 2019 %J Organometallics %K DFT ESR MS;crystal alkylaminocarbene compd compd;mol compd;optimized geometry monoradical organosilicon prepn stabilized structure %N 9 %P 1939--1945 %R 10.1021/acs.organomet.9b00041 %T Cyclic Alkyl(amino) Carbene-Stabilized Monoradicals of Organosilicon(IV) Compounds with Small Substituents %V 38 %X Radicals and biradicals can easily be obtained when Si(IV) compds. are reduced and stabilized by the Lewis base cyclic(alkyl)(amino)carbene (cAAC = C(CH2)(CMe2)2N-Dipp, Dipp = 2,6-i-Pr2C6H3) featuring strong s-donor and p-acceptor properties. To obtain the cAAC-stabilized monoradicals with halogen and alkyl substituents at the Si(IV) atoms, the Ar substituent (Ar = o-C6H4NMe2) was employed to act as a side-arm N donor ligand. The resulting monoradicals ArSiCl2(cAAC) (4) and ArSiRCl(cAAC) (R = Me 5; Et 6) were isolated by the redn. of ArSiCl2 (1) and ArSiRCl2 (R = Me 2; Et 3) with KC8 in the presence of cAAC with a strict ratio of 1:1:1. The three room-temp. stable radicals were kept for at least 3 mo in the solid state under dry N2 atmosphere without decompn. All the compds. were fully characterized by liq. injection field desorption/ionization-mass spectrometry, ESR spectroscopy, UV/visible spectroscopy, elemental anal., and single-crystal x-ray crystallog. studies. on SciFinder(R)

@article{Li.2019, abstract = {Radicals and biradicals can easily be obtained when Si(IV) compds. are reduced and stabilized by the Lewis base cyclic(alkyl)(amino)carbene (cAAC = C(CH2)(CMe2)2N-Dipp, Dipp = 2,6-i-Pr2C6H3) featuring strong \textgreek{s}-donor and \textgreek{p}-acceptor properties. To obtain the cAAC-stabilized monoradicals with halogen and alkyl substituents at the Si(IV) atoms, the Ar substituent (Ar = o-C6H4NMe2) was employed to act as a side-arm N donor ligand. The resulting monoradicals ArSiCl2(cAAC) (4) and ArSiRCl(cAAC) (R = Me 5; Et 6) were isolated by the redn. of ArSiCl2 (1) and ArSiRCl2 (R = Me 2; Et 3) with KC8 in the presence of cAAC with a strict ratio of 1:1:1. The three room-temp. stable radicals were kept for at least 3 mo in the solid state under dry N2 atmosphere without decompn. All the compds. were fully characterized by liq. injection field desorption/ionization-mass spectrometry, ESR spectroscopy, UV/visible spectroscopy, elemental anal., and single-crystal x-ray crystallog. studies. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Li, Wenling and Kundu, Subrata and Kohler, Christian and Li, Jiancheng and Dutta, Sayan and Yang, Zhi and Stalke, Dietmar and Herbst-Irmer, Regine and Stuckl, A. Claudia and Schwederski, Brigitte and Koley, Debasis and Kaim, Wolfgang and Roesky, Herbert W.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/28c8dd9e06f8c85cb1f3727f8d478367b/huebleriac}, doi = {10.1021/acs.organomet.9b00041}, interhash = {65462c069bc70f505712193262b32e14}, intrahash = {8c8dd9e06f8c85cb1f3727f8d478367b}, issn = {0276-7333}, journal = {Organometallics}, keywords = {DFT ESR MS;crystal alkylaminocarbene compd compd;mol compd;optimized geometry monoradical organosilicon prepn stabilized structure}, number = 9, pages = {1939--1945}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Cyclic Alkyl(amino) Carbene-Stabilized Monoradicals of Organosilicon(IV) Compounds with Small Substituents}, volume = 38, year = 2019 }