Abstract
The title organic ligands (Hsip) gave, by reaction with d 10-metal acetates, complexes of the type M(sip) 2 (M = Zn, Cd, Hg), in which the ligand behaved as terdentate, producing a distorted octahedral environment around the metal. The 1H and 13C chemical shifts found for these complexes in DMSO are compared with the corresponding ones of the free ligand. The crystal structure of the zinc derivative has been determined from diffractometer data to R = 0.072 for 1086 independent reflections. Crystals are monoclinic, space group C2/ c, with unit-cell dimensions a = 18.193(2), b = 24.532(6), c = 11.535(2) Å,β = 103.71(1)° and Z = 8. Coordination occurs through the carbonyl oxygens (Zn−O = 2.10, 2.16(1) Å), the azomethine nitrogens (Zn−N = 2.04, 2.07(1) Å) and the pyridine nitrogen s(Zn−N = 2.24, 2.26(1) Å).
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