The cationic d10 metal complexes (bdz)Cu(PPh3)2+ of the p accepting bidiazine (bdz) chelate ligands 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'- and 4,4'-bipyrimidine were prepd. and compared with the analogous complex of 2,2'-bipyridine. The long wavelength metal-to-ligand charge-transfer (MLCT) absorption max. and the redn. potentials indicate relatively little p* orbital stabilization by +Cu(PPh3)2. The particular d orbital splitting in a tetrahedral ligand field results in an addnl. contribution from Dt to the energy difference between the 1st and 2nd MLCT band. Only the most easily reduced complexes of 4,4'-bipyrimidine and 2,2'-bipyrazine yield neutral radical complexes (Cu(0)) which were characterized by ESR spectroscopy. on SciFinder(R)
%0 Journal Article
%1 Vogler.1992
%A Vogler, Conny
%A Kaim, Wolfgang.
%D 1992
%J Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences
%K bidiazine bipyrazine bipyridazine bipyrimidine;redn charge complex complex;copper copper potential transfer
%N 8
%P 1057--1062
%R 10.1515/znb-1992-0801
%T Mononuclear bis(triphenylphosphine)copper(I) complexes of bidiazines
%V 47
%X The cationic d10 metal complexes (bdz)Cu(PPh3)2+ of the p accepting bidiazine (bdz) chelate ligands 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'- and 4,4'-bipyrimidine were prepd. and compared with the analogous complex of 2,2'-bipyridine. The long wavelength metal-to-ligand charge-transfer (MLCT) absorption max. and the redn. potentials indicate relatively little p* orbital stabilization by +Cu(PPh3)2. The particular d orbital splitting in a tetrahedral ligand field results in an addnl. contribution from Dt to the energy difference between the 1st and 2nd MLCT band. Only the most easily reduced complexes of 4,4'-bipyrimidine and 2,2'-bipyrazine yield neutral radical complexes (Cu(0)) which were characterized by ESR spectroscopy. on SciFinder(R)
@article{Vogler.1992,
abstract = {The cationic d10 metal complexes [(bdz)Cu(PPh3)2]+ of the \textgreek{p} accepting bidiazine (bdz) chelate ligands 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'- and 4,4'-bipyrimidine were prepd. and compared with the analogous complex of 2,2'-bipyridine. The long wavelength metal-to-ligand charge-transfer (MLCT) absorption max. and the redn. potentials indicate relatively little \textgreek{p}* orbital stabilization by +Cu(PPh3)2. The particular d orbital splitting in a tetrahedral ligand field results in an addnl. contribution from \textgreek{D}t to the energy difference between the 1st and 2nd MLCT band. Only the most easily reduced complexes of 4,4'-bipyrimidine and 2,2'-bipyrazine yield neutral radical complexes (Cu(0)) which were characterized by ESR spectroscopy. [on SciFinder(R)]},
added-at = {2019-07-15T13:41:23.000+0200},
author = {Vogler, Conny and Kaim, Wolfgang.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2d75fbe06a3a5153515364ec5fc976c6f/b_schwederski},
doi = {10.1515/znb-1992-0801},
interhash = {1fd28c76f69600debe6737326a6d0182},
intrahash = {d75fbe06a3a5153515364ec5fc976c6f},
issn = {0932-0776},
journal = {Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences},
keywords = {bidiazine bipyrazine bipyridazine bipyrimidine;redn charge complex complex;copper copper potential transfer},
number = 8,
pages = {1057--1062},
timestamp = {2019-07-15T11:42:10.000+0200},
title = {Mononuclear bis(triphenylphosphine)copper(I) complexes of bidiazines},
volume = 47,
year = 1992
}