Halogeno(phenyl)-, Diphenyl-, Amino(phenyl)carben- und Phenylimido-Osmiumkomplexe durch Reaktion von mit Phenyllithium und Phenyl-Grignardreagenzien

Article abstract of DOI:10.1016/0022-328X(94)88074-3

On treatment of <(Mes)Os(CNR)Cl2> (2: R=t-Bu; 4: R=Cy; 5: R=Xyl)^* with C6H5MgBr, the diphenyl- and the bromo(phenyl)osmium(II) compounds <(Mes)OsPh2(CNR)> (7-9) and <(Mes)OsPh(CNR)Br> (10-12) are formed.As a minor product in the reaction of 4 with C6H5MgBr, the aminocarbene complex <(Mes)OsPh2<(=C(NHCy)Ph>> (6) is obtained.From <(Mes)Os(CNPh)Cl2> (3) and C6H5MgBr, besides <(Mes)OsPh(CNR)Br> (14) the five-membered ring compound (13) has been prepared; it reacts with CHCl3 to yield the chloro derivative (15).While the reactions of 2 and 3 with C6H5MgI lead to the compounds <(Mes)OsPh(CNR)I> (16, 17) and <(Mes)Os(CNR)I2> (18, 19), from 3 and C6H5Li the metallaheterocycle 13 and the carbene complex (20) are formed.The reaction of 4 and C6H5Li yields <(Mes)OsPh2(CNCy)> (8).The structure of 20 has been determined by an X-ray structural analysis.Key words: Osmium; Mesitylene; Isocyanide; Aminocarbene; Metallaheterocycle; X-ray diffraction