METALLIC CARBONYL-COMPLEXES CONTAINING HETEROCYCLE NITROGEN LIGANDS .2. RICARBONYLBROMO(3,3'-R-2,2'-BIQUINOLINE)RHENIUM(I) COMPOUNDS

Several BrRe(CO)3L complexes (where L groups are 2,2'-biquinoline subs tituted in the 3 and 3' positions) were prepared. Their pseudooctahedr al fac structure was established by using FTIR, UV-vis, and H-1-NMR an d confirmed by X-ray analysis. A good correlation between the electroc hemical parameters and the MLCT electronic transition was found. The c rystalline compound, BrRe(CO)3(3,3'-trimethylene-2,2'-biquinoline) bel ongs to triclinic space group P1BAR with a = 9.113(11) angstrom, b = 1 0.192(4) angstrom, c = 12.825(5) angstrom, alpha = 73.23(4)degrees, be ta = 81.30(7)degrees, and gamma = 66.55(5)degrees. The volume of the u nit cell is 1048(1) angstrom3 with Z = 2. The structure was refined to R = 0.040.