Coordinative satn. of 4,4'-bipyrimidine (L) was achieved in W(CO)52-m4-LW(CO)4. Electrochem. and spectroscopic studies of the compd. and its anion radical exhibit a metal-to-ligand charge-transfer absorption max. at unexpected high energy, despite a small HOMO/LUMO gap. Inspection of band widths shows that large Franck-Condon contributions from the structurally flexible W(CO)5 fragments are responsible for the hypsochromic shift relative to the mononuclear chelate system. The propensity of polyfunctional p acceptor ligands towards complete coordinative satn. with electron-rich metal fragments is discussed. on SciFinder(R)
%0 Journal Article
%1 Ernst.1988
%A Ernst, Sylvia
%A Kaim, Wolfgang.
%D 1988
%J Inorganica Chimica Acta
%K bipyrimidine carbonyl electrochem electronic transition trinuclear trinuclear;redox trinuclear;tungsten tungsten
%N 2
%P 223--226
%R 10.1016/S0020-1693(00)86290-8
%T On charge transfer-assisted polynucleation reactions. A trinuclear carbonyl-tungsten complex of ambident 4,4'-bipyrimidine
%V 144
%X Coordinative satn. of 4,4'-bipyrimidine (L) was achieved in W(CO)52-m4-LW(CO)4. Electrochem. and spectroscopic studies of the compd. and its anion radical exhibit a metal-to-ligand charge-transfer absorption max. at unexpected high energy, despite a small HOMO/LUMO gap. Inspection of band widths shows that large Franck-Condon contributions from the structurally flexible W(CO)5 fragments are responsible for the hypsochromic shift relative to the mononuclear chelate system. The propensity of polyfunctional p acceptor ligands towards complete coordinative satn. with electron-rich metal fragments is discussed. on SciFinder(R)
@article{Ernst.1988,
abstract = {Coordinative satn. of 4,4'-bipyrimidine (L) was achieved in [W(CO)5]2-\textgreek{m}4-LW(CO)4. Electrochem. and spectroscopic studies of the compd. and its anion radical exhibit a metal-to-ligand charge-transfer absorption max. at unexpected high energy, despite a small HOMO/LUMO gap. Inspection of band widths shows that large Franck-Condon contributions from the structurally flexible W(CO)5 fragments are responsible for the hypsochromic shift relative to the mononuclear chelate system. The propensity of polyfunctional \textgreek{p} acceptor ligands towards complete coordinative satn. with electron-rich metal fragments is discussed. [on SciFinder(R)]},
added-at = {2022-06-15T11:26:56.000+0200},
author = {Ernst, Sylvia and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2e8a74b29b60d0ba7b6847b3acb4e873c/huebleriac},
doi = {10.1016/S0020-1693(00)86290-8},
interhash = {4c1d603398eb3cf72ce89d18467b029a},
intrahash = {e8a74b29b60d0ba7b6847b3acb4e873c},
issn = {0020-1693},
journal = {Inorganica Chimica Acta},
keywords = {bipyrimidine carbonyl electrochem electronic transition trinuclear trinuclear;redox trinuclear;tungsten tungsten},
number = 2,
pages = {223--226},
timestamp = {2022-06-15T09:26:56.000+0200},
title = {On charge transfer-assisted polynucleation reactions. A trinuclear carbonyl-tungsten complex of ambident 4,4'-bipyrimidine},
volume = 144,
year = 1988
}