Abstract
Two new linked alkyne-bridging tetrahedral carbonyl clusters containing Co2C2 Co2(CO)6(μ-HCCCH2OOC(CH2)3COOCH2CCH-μ)Co2(CO)6, 1, and Co2(CO)6(μ-HCCCH2OOC(CH2)8COOCH2CCH-μ)Co2(CO)6, 2, have been prepared by reactions of two dipropargyl esters (HC≡CCH2OOC)2R (R = (CH2)3, (CH2)8) with Co2(CO)8. Expansion reactions of 1 and Co2(CO)6(μ-HCCCH2OOCCOOCH2CCH-μ)Co2(CO)6, 3, with Fe3(CO)12 give two new mixed-metal linked clusters Co2(CO)6(μ-HCCCH2OOC(CH2)3COOCH2CCH-μ,η4)Co2Fe2(CO)12, 4, and Co2(CO)6(μ-HCCCH2OOCCOOCH2CCH-μ,η4)Co2Fe2(CO)12, 5. The new clusters were characterized by elemental analysis, IR, 1H-NMR and ESI-MS analysis.
Acknowledgements
We are grateful to the National Science Foundation of China (20561002) and the Education Department of Inner Mongulia Autonomous Region (NJ04079) and the “513” project of Inner Mongulia University for financial support of this work.