Diisocyanide Complex Research Articles

Isocyanidsynthesen am komplex: VIII. Reaktionen im system {pentacarbonylrhenat/carbodiimid/elektrophil}: Rhenaazetidin-, diaminocarben-, isocyanid- und diisocyanidkomplexe

Pentacarbonylrhenate(1 −) adds to the unsymmetrical carbodiimides PhN=C=NR (R = Pr i, Bu t) to give metallacycles (not isolated) of the probable structure [(OC) 3 Re{C(=NPh)N(R)C (=O)}] − which is retained on monoprotonation. Diprotonation leads to the diaminocarbene complexes [Re(CO) 5 {C(NHPh)NHR}]X (X = Cl. [PF 6]) from which one amine component can be eliminated quantitatively. For R = Pr i, this results in [Re(CO) 5CNPr i][PF 6] whereas in the case of R=Bu t, exclusive formation of [Re(CO) 5CNPh][PF 6] is observed. A diisocyanide complex- cis-[Re(CO) 4(CNPr i)(CNPh)][PF 6] - is obtained from the reaction of the primary adduct with phosgene.