Add time:08/02/2019         Source:sciencedirect.com

A range of four coordinate metal complexes: square planar MX2L2 where M = Ni, Pd and Pt, X = Cl, Br and I and L = Et3P and Et2PhP; dinuclear planar M2X4L2 where M = Pd and Pt, X and L as above; and tetrahedral MX2L2 where M = Co and Zn, X and L as above, have been prepared and their low frequency infrared and 1H, 13C and 31P nuclear magnetic resonance spectra have been recorded. Trends in the ν(M-X), ν(M-P) and δ(MPC) vibration modes and in the chemical shift of the methylene group of the phosphines have been related to electronic effects within the complexes which influence the metal–ligand bond. New assignments of the vibrational modes ν(M-P) and δ(MPC) have been given.

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