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Synthesis and structural characterization of new mixed-ring indenyl derivatives of molybdenum containing phosphorus ligands |
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| Authors: | Isabel S. Gonç alves,Clá udia C.L. Pereira,Alan Hazell |
| Affiliation: | a Department of Chemistry, CICECO, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal b Instituto de Tecnologia Química e Biológica da Universidade Nova de Lisboa, Quinta do Marquês, EAN, Apt. 127, 2781-901 Oeiras, Portugal c Escola Superior de Tecnologia, Instituto Politécnico de Setúbal, 2910-761 Setúbal, Portugal d Department of Chemistry, University of Aarhus, Langelandsgade 140, DK-8000 Aarhus C, Denmark |
| Abstract: | Reaction of NaBH4 with [IndCpMo(dppe)](BF4)2 (1) in acetone yields [IndMo(η4-C5H6)(dppe)]BF4 (2) quantitatively. The hydride addition takes place at the external face of the Cp ring. Dissolution of 2 in dichloromethane gives [IndMo(η4-C5H5-exo-CH2Cl)(dppe)]BF4, as confirmed by elemental analysis, IR and 1H NMR spectroscopy. The similar dication [IndCpMo{P(OMe)3}2](BF4)2 (4) reacts with NaBH4, in a solvent dependent manner. In acetonitrile, [IndMo(η4-C5H6){P(OMe)3}2]BF4 (5) is obtained and in acetone a P(OMe)3 ligand is lost resulting in the asymmetric phosphite-hydride, [IndCpMoH{P(OMe)3}]+ (6). The molecular structures of [IndMo(η4-C5H6){P(OMe)3}2]PF6 and [IndCpMoH{P(OMe)3}]PF6 were characterized by single-crystal X-ray diffraction. |
| Keywords: | Molybdenum Cyclopentadienyl Indenyl Hydride Molybdenocene Mixed-ring indenyl complexes |
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