Abstract
Electronic and proton nuclear magnetic resonance spectra have been employed to elucidate the nature of the adducts formed by morpholine with a number of bis(0,0′-dialkyldithiophosphato)nickel(II) complexes, Ni(S 2P( OR) 2) 2 ( R = ethyl, n-propyl, isopropyl, isobutyl, sec-butyl, cyclohexyl, and 2-phenylethyl). Upfield NMR contact shifts of the -NH- proton were used to assign metal-nitrogen coordination by morpholine. The morpholine adducts exhibit properties consistent with a 5-coordinate (∼C 4 v ) geometry. NMR contact shifts and electron spin-nuclear spin coupling constants are tabulated and electron delocalization mechanisms are discussed.
Published Version
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