作者:C. Pettinari
DOI:10.1016/s0277-5387(01)00895-6
日期:2001.9
From the interaction of imidazole-type ligand L (L = imidazole (im), 1-methylimidazole (1-meim), 2-methylimidazole (2-meim), 4-methylimidazole (4-meim), benzimidazole (bzim), 1-benzylimidazole (bnim)) with [Cu(N-3)(PPh3)(2)](2) the new mononuclear [Cu(N-3)(PPh3)(2)(L)] and dinuclear [Cu-2(N-3)(2)(PPh3)(3)(L)] species have been obtained. Chelating bidentate ligands (L-2 = 2.2-bipyridyl (bipy), 1,10-phenanthroline (phen) or 2,9-dimethyl-1,10-phenanthroline (cupr)) react with [M(N-3)(PPh3)(2)](2) (M = Cu or Ag) yielding [M(N-3)(PPh3)(L-2)]. The S-donors 1-methyl-2-imidazol-2(3H)-thione (Hmimt), 2-benzothiazolethiol (Hbtt) and 2-pyridinethiol (Hpyt) react with [Cu(N-3)(PPh3)(2)](2) in ethanol undergoing deprotonation and yielding [Cu(mimt)(Ph3P)](n), [Cu(btt)](n) and [Cu(pyt)](n), respectively. On the contrary, Hmimt and imidazoline-2(1,3H)thione (Himt) react in diethyl ether with [Cu(N-3)(PPh3)(2)](2) yielding [Cu(N-3)(Hmimt)(3)] and [Cu(N-3)(PPh3)(Himt)], respectively. P(o-tolyl)(3) is able to displace the less basic phosphine PPh3 from [Cu(N-3)(PPh3)(cupr)] yielding the complex [Cu(N-3)P(o-tolyl)(3)}(cupr)]. 1,3-Bis(diphenylphosphino)propane (dppp) reacts with [Cu(N-3)(PPh3)(cupr)] yielding the complex [Cu-2(N-3)(2)(dppp)(3)]. [Cu(N-3)(PPh3)(2)(im)] and [Cu(N-3)(PPh3)(phen)] react with CS2 in benzene, in presence of excess of PPh3 forming [Cu(SCN)(PPh3)(2)] and [Cu(tz)(PPh3)(phen)] (Htz = 4-thia-1,2,3-triazole-5-thione), respectively. [Ag(N-3)(PPh3)(cupr)] reacts slowly with excess of CS2 in diethyl ether giving [Ag(tz)(cupr)], whereas the same reaction in benzene in excess of PPh3 yields immediately [Ag(SCN)(PPh3)(2)]. From the reaction of [Ag(N-3)(PPh3)(cupr)] with cyCN the complex [Ag(N-3)(cyCN)(PPh3)(cupr)] formed. All derivatives were characterized by IR and far-IR data, conductivity, H-1 NMR and in some cases also with P-31H-1} NMR and molecular weight measurements. (C) 2001 Elsevier Science Ltd. All rights reserved.