1H, 13C and 103Rh NMR spectroscopy of rhodium(I) complexes of 2,2, N, N-tetramethyl-3-buten-1-amine

Abstract

Reaction of μ-dichlorotetraethylenedirhodium(I) with 2,2, N, N-tetramethyl-3-buten-1-amine ( 1) proceeds with displacement of only one ethylene per rhodium, and with cleavage of the chloride bridges to yield Cl(C 2H 4)Rh · 1 ( 2). The remaining ethylene in 2 can be replaced by acetonitrile, which in turn, has been replaced by pyridine, 4-cyanopyridine or 4-dimethylaminopyridine. High-resolution FT 1H and 13C NMR data are consistent with square planar structures for the products, with 1 acting as a bidentate chelate, the chloro ligand being cis to the dimethylamino moiety of 1. High-resolution FT 103Rh NMR data are also reported.