119726-26-0Relevant articles and documents
Synthesis and Reactions of Some Cyclobutadiene Complexes of Cobalt
Ahmad, Jasim U.,Kabir, Shariff E.,Ullah, Sayed S.
, p. 129 - 132 (2007/10/02)
Optimum conditions for the stepwise synthesis of the cyclobutadiene complexes C4H4Co2(CO)6(I) and C4H4Co(CO)2HgCo(CO)4(II) have been established.Their common iodine derivative, C4H4Co(CO)2I(III), on reaction with PPh3, CH3MgI and Hg2 gives the substitution product C4H4Co(CO)PPh3I(V), methyl derivative C4H4Co(CO)2CH3(X) and the heteronuclear complex C4H4Co2Hg(CO)5PPh3(VIII), respectively.The reaction of C4H4Co2(CO)6(I) with triphenylmethyl tetrafluoroborate gives the butadienyl salt (+)(IV).When (III) is reacted with PPh3 and AgPF6, a mixture ofphosphine substituted butadienyl salt PF6(VI), and the phosphine substituted iodo derivative (V) is obtained.Appropriate reaction schemes have been proposed on the basis of IR and PMR evidences.