Abstract
Re(bdz)(CO)3X (X = Cl or Br; bdz = 3,3'-bipyridazine, 2,2'-bipyrazine, 2,2'-and 4,4'-bipyrimidine) were prepd. from Re(CO)5X by thermal substitution. All the complexes show long-wavelength emission at room temp. in CHCl3 soln. after irradn. into the metal-to-ligand charge transfer band. Spectroscopic data and electrochem. redn. potentials confirm the superior polarizing ability of neutral Re(CO)3X fragments for a-diimine p system, and the electrochem. and photophys. data can be correlated with the established properties of the free ligands, of their anion radicals, and of other d6 metal (W0, RuII) complexes. on SciFinder(R)
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