R. Gross, and W. Kaim. Angewandte Chemie, 97 (10):
869--870(1985)
Abstract
The neutral complexes Cp1(CO)2MnL (Cp1 = methylcyclopentadienyl; L = 4-cyanopyridine, p-(NC)2C6H4) and Cp1(CO)2Mn2L1 (L1 = 4,4'-bipyridine) were reduced by K to give ligand-centered radical anionic complexes Cp1(CO)2Mn(L-.bul.) (I; L = 4-cyanopyridine) and Cp1(CO)2Mn2L2.bul.- (II; L2 = p-(NC)2C6H4, 4,4'-bipyridine). The ESR spectra of paramagnetic I and II showed they contained neutral Mn(I) fragments, in which the d6 Mn stabilized the radical anionic ligands by p-backbonding. In contrast, neutral, paramagnetic Cp1(CO)2MnR (R = NHC6H4NMe2-4, imidazolo, NHR1; R1 = 4-pyridyl) and Cp5(CO)2Mn(NHC6H4Me-4) (Cp5 = pentamethylcyclopentadienyl), prepd. by oxidative deprotonation of Cp1(CO)2Mn(RH) or Cp5(CO)2Mn(NH2C6H4Me-4), contained low spin Mn(II) and diamagnetic ligands. on SciFinder(R)
%0 Journal Article
%1 Gross.1985
%A Gross, Renate
%A Kaim, Wolfgang.
%D 1985
%J Angewandte Chemie
%K ESR amido arom;manganese carbonyl cyclopentadienyl manganese radical stabilization
%N 10
%P 869--870
%T Stabilization of Cp(CO)2Mn fragment radicals?
%V 97
%X The neutral complexes Cp1(CO)2MnL (Cp1 = methylcyclopentadienyl; L = 4-cyanopyridine, p-(NC)2C6H4) and Cp1(CO)2Mn2L1 (L1 = 4,4'-bipyridine) were reduced by K to give ligand-centered radical anionic complexes Cp1(CO)2Mn(L-.bul.) (I; L = 4-cyanopyridine) and Cp1(CO)2Mn2L2.bul.- (II; L2 = p-(NC)2C6H4, 4,4'-bipyridine). The ESR spectra of paramagnetic I and II showed they contained neutral Mn(I) fragments, in which the d6 Mn stabilized the radical anionic ligands by p-backbonding. In contrast, neutral, paramagnetic Cp1(CO)2MnR (R = NHC6H4NMe2-4, imidazolo, NHR1; R1 = 4-pyridyl) and Cp5(CO)2Mn(NHC6H4Me-4) (Cp5 = pentamethylcyclopentadienyl), prepd. by oxidative deprotonation of Cp1(CO)2Mn(RH) or Cp5(CO)2Mn(NH2C6H4Me-4), contained low spin Mn(II) and diamagnetic ligands. on SciFinder(R)
@article{Gross.1985,
abstract = {The neutral complexes Cp1(CO)2MnL (Cp1 = methylcyclopentadienyl; L = 4-cyanopyridine, p-(NC)2C6H4) and [Cp1(CO)2Mn]2L1 (L1 = 4,4'-bipyridine) were reduced by K to give ligand-centered radical anionic complexes Cp1(CO)2Mn(L-.bul.) (I; L = 4-cyanopyridine) and [Cp1(CO)2Mn]2[L2.bul.-] (II; L2 = p-(NC)2C6H4, 4,4'-bipyridine). The ESR spectra of paramagnetic I and II showed they contained neutral Mn(I) fragments, in which the d6 Mn stabilized the radical anionic ligands by \textgreek{p}-backbonding. In contrast, neutral, paramagnetic Cp1(CO)2MnR (R = NHC6H4NMe2-4, imidazolo, NHR1; R1 = 4-pyridyl) and Cp5(CO)2Mn(NHC6H4Me-4) (Cp5 = pentamethylcyclopentadienyl), prepd. by oxidative deprotonation of Cp1(CO)2Mn(RH) or Cp5(CO)2Mn(NH2C6H4Me-4), contained low spin Mn(II) and diamagnetic ligands. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Gross, Renate and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2b5e861120cd2394777729c09ce34bd71/b_schwederski},
interhash = {3c6d3d76f99e512699bc162f4f2e921b},
intrahash = {b5e861120cd2394777729c09ce34bd71},
issn = {0044-8249},
journal = {Angewandte Chemie},
keywords = {ESR amido arom;manganese carbonyl cyclopentadienyl manganese radical stabilization},
number = 10,
pages = {869--870},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Stabilization of Cp(CO)2Mn fragment radicals?},
volume = 97,
year = 1985
}