Reactions of Fe-3(CO)(12) with 2-methyl-3-butyn-1-ol and 3-pentyn-1-ol under basic methanolic conditions: The crystal structures of Fe-2(CO)(6)(mu-CO)(mu-eta(2)-[HC-C\=C(CH3)(2)\C(=O)(OCH3)]) and of (mu-H)Fe-3(CO)(9)(mu(3)-eta(3)-[H3CCC(CH2)(CH2)CO])

The reactions of Fe-3(CO)(12) with 2-methyl-3-butyn-2-ol and 3-pentyn-1-ol in CH3OH/KOH solution lead, respectively, to the binuclear complex Fe-2(CO)(6)(mu-CO)(mu-eta(2)-[HCC\=C(CH3)(2)\C(=O)(OCH3)]) (as the main product) and to the closed trinuclear hydridic complex (mu-H)Fe-3(CO)(9)(mu(3)-eta(3)-[H3CCC(CH2)(CH2)CO]) (as the unique product). The oxygenated ligands of these complexes are formed, respectively, by coupling of a formerly coordinated CO with a methoxy group and by coupling of a formerly coordinated CO with a deoxygenated alkynic residual. (c) 2008 Elsevier B. V. All rights reserved.