Synthesis and reactions of [Co(RCN){PPh(OEt)(2)}(3){eta(2)-C6H5PO(OEt)(2)}]BPh4 derivatives: Strong evidence for eta 2-coordination of the phenyl ring of the C6H5PO(OEt)(2) ligand
G. Albertin et al., Synthesis and reactions of [Co(RCN){PPh(OEt)(2)}(3){eta(2)-C6H5PO(OEt)(2)}]BPh4 derivatives: Strong evidence for eta 2-coordination of the phenyl ring of the C6H5PO(OEt)(2) ligand, ORGANOMETAL, 18(11), 1999, pp. 2052-2054
Cobalt(I) complexes [Co(RCN)P-3{eta(2)-C6H5PO(OEt)(2)}]BPh4 (1; R = Me, Ph;
P = PPh(OEt)(2)) were prepared by allowing [CoClP4]BPh4 compound to react
with zinc dust in a cosolvent mixture of nitrile and ethanol. eta(2)-Coordi
nation of the arena ring of the C6H5PO(OEt)(2) ligand was confirmed by H-1
and C-13 NMR spectra and decoupling experiments. Substitution reactions wit
h CO Or isocyanide gave free C6H5PO(OEt)(2), RCN, and [Co(CO)(2)P-3](+) or
[Co(RNC)(2)P-3](+) cations. Treatment of 1 with H-2 (1 atm), in either the
presence or absence of a heterogeneous catalyst, gave the unstable cobalt(I
II) dihydride derivative [CoH2P3{eta(2)-C6H5PO(OEt)(2)}](+).