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)
%0 Journal Article
%1 Li.2017
%A Li, Bin
%A Kundu, Subrata
%A Stueckl, A. Claudia
%A Zhu, Hongping
%A Keil, Helena
%A Herbst-Irmer, Regine
%A Stalke, Dietmar
%A Schwederski, Brigitte
%A Kaim, Wolfgang
%A Andrada, Diego M.
%A Frenking, Gernot
%A Roesky, Herbert W.
%D 2017
%J Angewandte Chemie, International Edition
%K ESR aluminum coordination crystallog neutral radical sphere stable
%N 1
%P 397--400
%R 10.1002/anie.201609101
%T A Stable Neutral Radical in the Coordination Sphere of Aluminum
%V 56
%X 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)
@article{Li.2017,
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)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Li, Bin and Kundu, Subrata and Stueckl, A. Claudia and Zhu, Hongping and Keil, Helena and Herbst-Irmer, Regine and Stalke, Dietmar and Schwederski, Brigitte and Kaim, Wolfgang and Andrada, Diego M. and Frenking, Gernot and Roesky, Herbert W.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/233a97ea54c33b07454ceaa6bb41c4946/b_schwederski},
doi = {10.1002/anie.201609101},
interhash = {84ffa8e2f3d3f81f14fca5ee9df1c32e},
intrahash = {33a97ea54c33b07454ceaa6bb41c4946},
issn = {1433-7851},
journal = {Angewandte Chemie, International Edition},
keywords = {ESR aluminum coordination crystallog neutral radical sphere stable},
number = 1,
pages = {397--400},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {A Stable Neutral Radical in the Coordination Sphere of Aluminum},
volume = 56,
year = 2017
}
