M. Nonoyama, K. Nakajima, Hiroyuki Mizuno
1994
Citations
0
Influential Citations
13
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract N,N -Dimethylbenzo[ b ]furan-2-carbothio (and seleno) amides (abbreviated as Hzft and Hzfs) were prepared from the corresponding carboxamide upon reaction with Lawesson's reagent and phenyldichlorophosphine selenide, respectively. Both Hzft and Hzfs were cyclopalladated with lithium tetrachloropatladate(II) and cyclorhodated with hexachlorotetrakis(tri-n-butylphosphine)dirhodium(IlI), while cycloruthenation with tetrachlorohexacarbonyldiruthenium(II) occurred only with Hzft. These cyclometallated products were spectroscopically characterized. The benzofuran ring was metallated at position 3 and the amide groups were coordinated through the sulfur or selenium atom to form a five-membered metallathia (of selena) heterocycle. The corresponding benzo[ b ]thiophene (thianaphthene) analogues were not cyclometallated under similar conditions. The structures of Hzfs, [PdCl(zfs)(PBu 3 )], and [RuCl(zft)(CO) 2 (PBu 3 )] were determined by X-ray analysis.