Syntheses and reactions of dimolybdenum propargyl alcohol compounds containing functionally substituted ligands

Several dimolybdenum propargyl alcohol compounds containing functionally substituted cyclopentadienyl ligands, [Mo-2(mu-CHCCH2OH)(CO)(4)(eta(5)-C5H4C(O)R)(2)] [R = OEt, (1); R = Me, (2); R = Ph, (3)], were synthesized by reactions of propargyl alcohol with [Mo(CO)(2)(eta(5)-C5H4C(O)R)](2) (R = OEt, Me, Ph). The further reactions of these compounds with Co-2(CO)(8) in refluxing toluene were investigated. From the reaction of compound (1) with Co-2(CO)(8), a new butterfly compound, [Co2Mo2(mu(4)-CHCCH2OH)(mu-CO)(4)(CO)(4)(eta(5)-C5H4C(O)OEt)(2)] (4), was isolated. The structure of compound (2) was determined by a single-crystal X-ray diffraction analysis. The crystal data for compound (2) are: monoclinic, space group P2(1)/a (#14), a = 10.489(2) Angstrom, b = 11.904(2) Angstrom, c = 16.488(3) Angstrom, beta = 91.39(1)degrees, V = 2058.2(6) Angstrom(3), Z = 4, D-c = 1.853 g cm(-3), R = 0.032 and R-w = 0.042.