144473-95-0Relevant academic research and scientific papers
Mononuclear Bis(triphenylphosphine)copper(I)Complexes of the Bidiazines
Vogler, Conny,Kaim, Wolfgang
, p. 1057 - 1062 (2007/10/02)
The cationic d10 metal complexes + of the ? accepting bidiazine (bdz) chelate ligands 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'- and 4,4'-bipyrimidine were synthesized and compared with the analogous complex of 2,2'-bipyridine.The long wavelength metal-to-ligand charge transfer (MLCT) absorption maxima and the reduction potentials indicate relatively little ?* orbital stabilization by +Cu(PPh3)2.The particular d orbital splitting in a tetrahedral ligand field results in an additional contribution from Δ1 to the energy difference between the first and second 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. Copper Complexes, Heterocyclic Ligands, Electrochemistry, Absorption Spectroscopy, ESR Spectra
