Isonicotinate bridging ligand

The rate constants and activation parameters for a series of Co(III)-Ru(II) complexes separated by Gly, Phe, Pro, and GlyGly, GlyPhe, ProPro are shown in Table I. This series of rate constants is compared to the rate constant and activation parameters for the parent compound (III) with an isonicotinate bridging ligand. In the parent compound III, the ligands around... 

Several other complexes with N-donor ligands have been prepared.1065 The complexes CoM(NCS)4(L)6 (M = Zn or Cd L = 2-, 3- or 4-cyanopyridine, nicotinamide, ethyl nicotinate or isonicotinic acid hydrazide) are best formulated as CoL6M(SCN)4. The complexes CoHg(SCN)4L2 (L = 2-, 3- or 4-aminopyridine, 3-cyanopyridine or ethyl nicotinate) possess only bridging SCN ligands, and have the polymeric structure (139). On the other hand, the complexes CoZn(NCS)4L2 (L = 2-, 3- and 4-aminopyridine) contain both bridging and terminal SCN groups, and are postulated to have the dimeric structure (140). 

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