Pyridyl benzimidazole, benzoxazole, and benzothiazoleplatinum complexes

摘要

Oxidative cyclization of 1,2-phenylenediamine, 2-aminophenol, and 2-aminothiophenol with pyridine carboxaldehydes affords the corresponding benzimidazole, benzoxazole, and benzothiazole pyridyl ligands. Addition of these compounds (L-p) to [PtCl2(coe)](2) (coe = cis-cyclooctene) or K2PtCl4 gives didentate CiS-PtCl2(L-p) or monodentate CiS-PtCl2(L-p)(2) in moderate to high yields. Crystals of cis-dichloro(2-pyrid-2-ylbenzothiazole)platinum(II) (1c) as the CH2Cl2 solvate were triclinic, space group P1, a = 7.8715(6) Angstrom, b = 9.9873(7) Angstrom, c = 10.5883(8) Angstrom, alpha = 104.149(1)degrees,beta = 103.754(1)degrees, gamma = 96.864(1)degrees, Z = 2. cis-dichlorodi(2-pyrid-3-ylbenzoxazolc)platinum(II) (2b) crystallized with a molecule of THF and H2O and were monoclinic, space group C2/c, a = 18.698(10) Angstrom, b = 16.325(10) Angstrom, c = 8.853(6) Angstrom, beta = 90.149(17)degrees, Z = 4. (C) 2003 Elsevier Ltd. All rights reserved.