A tetrakis(amidinato)dichromium compd. was for the first time prepd. in the form of crystals suitable for structure detn., and the structure was solved and refined by x-ray crystallog. The amidinato ligand used was [MeNCPhNMe]-. The complex crystallizes in space group P1̅, with a 9.770(2), b 11.717(2), c 9.620(2)\AA, and a 113.93(2), b 104.48(2), g 101.30(2)°; V 918(1)\AA and Z = 1. The Cr2(MeNCPhNMe)4 mol. has virtual D4h symmetry and there is no axial coordination since the 4 Me groups on each end screen the axial positions very effectively. The Cr-Cr distance is 1.843(2)\AA, making this one of the shorter of the \dqsupershort\dq Cr-Cr quadruple bonds. This structure thus provides further evidence that the long Cr-Cr distances found in all Cr2(O2CR)4 and Cr2(O2CR)4L2 compds. are primarily the result of axial coordination. [on SciFinder(R)]
%0 Journal Article
%1 Bino.1979b
%A Bino, Avi
%A Cotton, F. Albert
%A Kaim, Wolfgang.
%D 1979
%J Inorganic Chemistry
%K amidinato axial bond bridged chromium complex ligand;chromium
%N 12
%P 3566--3568
%R 10.1021/ic50202a054
%T A tetrakis(amidinato)dichromium complex with a \dqsupershort\dq chromium-chromium quadruple bond
%V 18
%X A tetrakis(amidinato)dichromium compd. was for the first time prepd. in the form of crystals suitable for structure detn., and the structure was solved and refined by x-ray crystallog. The amidinato ligand used was [MeNCPhNMe]-. The complex crystallizes in space group P1̅, with a 9.770(2), b 11.717(2), c 9.620(2)\AA, and a 113.93(2), b 104.48(2), g 101.30(2)°; V 918(1)\AA and Z = 1. The Cr2(MeNCPhNMe)4 mol. has virtual D4h symmetry and there is no axial coordination since the 4 Me groups on each end screen the axial positions very effectively. The Cr-Cr distance is 1.843(2)\AA, making this one of the shorter of the \dqsupershort\dq Cr-Cr quadruple bonds. This structure thus provides further evidence that the long Cr-Cr distances found in all Cr2(O2CR)4 and Cr2(O2CR)4L2 compds. are primarily the result of axial coordination. [on SciFinder(R)]
@article{Bino.1979b,
abstract = {A tetrakis(amidinato)dichromium compd. was for the first time prepd. in the form of crystals suitable for structure detn., and the structure was solved and refined by x-ray crystallog. The amidinato ligand used was [MeNCPhNMe]-. The complex crystallizes in space group P1̅, with a 9.770(2), b 11.717(2), c 9.620(2){\AA}, and \textgreek{a} 113.93(2), \textgreek{b} 104.48(2), \textgreek{g} 101.30(2)°; V 918(1){\AA} and Z = 1. The Cr2(MeNCPhNMe)4 mol. has virtual D4h symmetry and there is no axial coordination since the 4 Me groups on each end screen the axial positions very effectively. The Cr-Cr distance is 1.843(2){\AA}, making this one of the shorter of the {\dq}supershort{\dq} Cr-Cr quadruple bonds. This structure thus provides further evidence that the long Cr-Cr distances found in all Cr2(O2CR)4 and Cr2(O2CR)4L2 compds. are primarily the result of axial coordination. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Bino, Avi and Cotton, F. Albert and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/25c472139453c9d32b3e8e2f530ff2e87/b_schwederski},
doi = {10.1021/ic50202a054},
interhash = {3693a78af3f760f14373d8776191d9cc},
intrahash = {5c472139453c9d32b3e8e2f530ff2e87},
issn = {0020-1669},
journal = {Inorganic Chemistry},
keywords = {amidinato axial bond bridged chromium complex ligand;chromium},
number = 12,
pages = {3566--3568},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {A tetrakis(amidinato)dichromium complex with a {\dq}supershort{\dq} chromium-chromium quadruple bond},
volume = 18,
year = 1979
}
