Synthesis, characterization of new Rh---Co mixed-metal clusters and reactions of clusters containing [Rh2Co2C2] core with 1-alkynes and/or carbon monoxide |
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| Authors: | Bao-Hua Zhu Wei-Qiang Zhang Quan-Yi Zhao Zhi-Guo Bian Bin Hu Yu-Hua Zhang Yuan-Qi Yin Jie Sun |
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| Institution: | a State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China |
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| Abstract: | Six new cluster derivatives Rh2Co2(CO)6(μ-CO)4(μ4,η2-HC CR)] (R=FeCp2 1, CH2OH 2, (CH3O)C10H6CH(CH3)COOCH2CCH 3) and RhCo3(CO)6(μ-CO)4(μ4,η2-HCCR)] (R=FeCp2 4, CH2OH 5, (CH3O)C10H6CH(CH3)COOCH2CCH 6) were obtained by the reactions of Rh2Co2(CO)12] and RhCo3(CO)12] with substituted 1-alkyne ligands HCCR R=FeCp2 7, CH2OH 8, (CH3O)C10H6CH(CH3) COOCH2CCH 9] in n-hexane at room temperature, respectively. Alkynes insert into the Co---Co bond of the tetranuclear clusters to give butterfly clusters. Rh2Co2(CO)6(μ-CO)4(μ4,η2-HCCFeCp2)] (1) was characterized by a single-crystal X-ray diffraction analysis. Reactions of 1, 2 with 7, 8 and ambient pressure of carbon monoxide at 25 °C gave two known cluster complexes Co2(CO)6(μ2, η2-HCCR)] (R=FeCp2 10, CH2OH 11), respectively. All clusters were characterized by element analysis, IR and 1H-NMR spectroscopy. |
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| Keywords: | Functionally substituted 1-alkynes Mixed-metal Cluster complexes Crystal structure |
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