84893-34-5Relevant academic research and scientific papers
Synthesis and reactions of nickel and palladium carbon-bound enolate complexes
Burkhardt, Elizabeth R.,Bergman, Robert G.,Heathcock, Clayton H.
, p. 30 - 44 (2008/10/08)
Nickel and palladium carbon-bound enolates of the general formula η5-C5R5(Ph 3P)MCHR′COR″ (R = H, CH3; R′ = H, CH3; R″ = t-Bu, Ph, O-t-Bu) were prepared. Cp*(Ph3P)NiCH2CO2-t-Bu (1e) was characterized by X-ray diffraction. Compound 1e crystallizes in the monoclinic space group P21/n with unit-cell dimensions a = 13.6110 (20) A?, b = 12.7454 (13) A?, c = 17.8571 (23) A?, β = 105.544 (11)°, Z = 4, observed data 4091, R = 4.53%, and Rw = 4.19%. Reactions of these nickel and palladium enolates with aldehydes and other electrophilic reagents were examined. The nickel ketone enolates were shown to react with 2 equiv of benzaldehyde to deliver products resulting from a Tischtschenko-type oxidation/reduction process. Cp(Ph3P)NiCH2CO-t-Bu reacts with phosphines (L) to yield paramagnetic nickel(I) complexes of general formula Cp(L)2Ni.
