The coordination chemistry of 2,1,3-benzothiadiazole and 2,1,3-benzoselenadiazole. Complexes of ruthenium, osmium and iridium

Abstract

The reactions of [MCl(C6H4Me-4)(CO)(PPh3)2] (M Ru, Os) and [IrCl2H(PPh3)3] with 2,1,3-benzothiadiazole (BTD) result in quantitative formation of the adducts [MCl(C6H4Me-4)(CO)(PPh3)2(BTD)] and [IrCl2H(PPh3)2(BTD)], respectively. Similar reactions with 2,1,3-benzoselenadiazole (BSD) provide the corresponding selenium analogues. The thiocarbonyl complex [OsCl2(CS)(PPh3)2-(BSD)] is obtained by replacement of one phosphine in [OsCl2(CS)(PPh3)3]. The BSD and BTD ligands in the complexes are labile; [OsCl(C6H4Me-4)(CO)(PPh3)2-(BSD)] reacts with carbon monoxide and N,N-dimethylthionitrosamine to give [OsCl(C6H4Me-4)(CO)2(PPh3)2] and [OsCl(C6H4Me-4)(CO)(PPh3)2(SNNMe2)], respectively. The IR, 1H, and 31P-{1H} NMR data for the new complexes are reported and discussed. Show more