Solid state structures and 13C NMR spectra of the seven-coordinate complexes [WI2(CO)3(NCR)2] (R Me or Et)

Abstract The X-ray crystal structures of the two seven-coordinate complexes [WI 2 (CO) 3 (NCR) 2 ] {R  Me ( 1 ) or Et ( 2 )} have been determined. In both structures, the molecules have crystallographic m symmetry. The geometries of the metal coordination spheres are very similar, conforming reasonably well to distorted capped octahedra. The 13 C NMR spectra of 1 and 2 are also described, and for the case of complex 1 can be correlated with the crystallographically aobserved geometry.