Isocyanidkomplexe : II. Pentacarbonylisocyanboranchrom(0)-komplexe☆

Abstract The reaction of K[(CO) 5 CrCN] (I) with haloboranes R 2 BX yields the isocyanoborane complexes (CO) 5 CrCNBR 2 with R = Et (II), R = OMe (III) and R = NMe 2 (IV). II and III react with pyridine forming the corresponding adducts. Complex IV can also be formed by treatment of (CO) 5 Cr(THF) with the cyanoborane NCB(NMe 2 ) 2 . (CO) 5 CrCNBCl(OMe) · NMe 3 (VII), prepared from I and Cl 2 BOMe · NMe 3 , yields {(CO) 5 CrCN} 2 BOMe · NMe 3 (VIII) when treated with excess I. The compounds are characterized by IR, NMR and mass spectra.