摘要:
The Schiff base, 2-chlorophenylsalicylaldimine (HL1), is formed readily from salicylaldehyde and 2-chloroaniline. After deprotonation, this ligand is found to react as a bidentate mixed-donor chelate with the complexes [RuRCl(CO)(BTD)(PPh3)(2)] (R = H, CH=CHC6H5, CH=CHC6H4Me-4, CH=CH'Bu, CC CPh=CHPh; BTD = 2,1,3-benzothiadiazole) to form the compounds [RuR(L-1)(CO)(PPh3)(2)] through displacement of the chloride and BTD ligands. An analogous reaction occurs with the osmium complex [OsHCl(CO)(BTD)(PPh3)(2)] to provide [OsH(L-1)(CO)(PPh3)(2)]. The compound [Ru(CH=CHC6H4Me-4)(L-1)(CO)(PPh3)(2)] is formed through reaction of salicylalclehyde (HL2) with [Ru(CH=CHC6H4Me-4)Cl(CO)(BTD)(PPh3)(2)] in the presence of base. Two further ligands were investigated to extend the study to encompass 5- and 4-membered chelates; 8-hydroxyquinoline (HL3) and 2-hydroxy-4-methylquinoline (HL4) react with [Ru(CH=CHPh)Cl(CO)(BTD)(PPh3)(2)] and [Ru(CH=CHC6H4Me-4)Cl(CO)(BTD)(PPh3)(2)] in the presence of base to yield the complexes [Ru(CH=CHPh)(L-3)(CO)(PPh3)(2)] and [Ru (CH=CHC6H4Me-4)(L-4)(CO)(PPh3)(2)], respectively. The crystal structure of [Ru(CH=CHC6H4Me-4)(L-1)(CO)(PPh3)(2)] is reported. (c) 2005 Elsevier B.V. All rights reserved.