Convergent synthetic routes to heterobimetallic compounds: Crystal and molecular structure of 1-(η5-cyclopentadienyl manganese tricarbonyl)-1-(η6-phenyl chromium tricarbonyl) ethanol

Article abstract of DOI:10.1016/S0022-328X(96)06679-X

13 heterobimetallic compounds have been prepared by a convergent synthetic strategy employing reactions of a lithiocyclopentadienyl or lithioarene metal complex with formyl, acetyl or carbomethoxy functionalized derivatives of a second metal. The resulting lithium alkoxide products were converted to the corresponding alcohols by dilute acid work-up. Two methanol derivatives were successfully converted to their corresponding methane derivatives by reaction with trifluoroacetic acid followed by reaction of the resultant carbocation with sodium tetrahydroborate. Reaction of 1-[η⁶-C₆H₅Cr(CO)₃]-1-[η⁵-C₅H4Mn(CO)₃]C₂H₃OH with trifluoroacetic acid results in dehydration to yield the corresponding ethene derivative. The molecular structure of 1-[η⁶-C₆H₅Cr(CO)3]-1-[η⁵-C₅H₄Mn(CO)₃]C₂H₃OH was determined: monoclinic, P2₁/c, a = 7.936(2), b = 19.844(8), c = 11.774(4)A, β = 91.58(2)°, V = 1853(1) A³, Z = 4, R(F) = 4.52%.