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Synthesis, characterization and molecular structures of allenylidene, vinylidene-alkylidene complexes containing [CpOs(PPh3)2] fragment |
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| Authors: | R Lalrempuia Yurij A Mozharivskyj |
| Institution: | a Department of Chemistry, North Eastern Hill University, Shillong-793 022, India b Department of Biochemistry and Molecular Biology, The Pennsylvania State University, PA 16802, USA c Ames Laboratory, Iowa State University of Science and Technology, Ames, IA 50011, USA |
| Abstract: | The reaction of CpOs(PPh3)2Br] with diphenylpropargylic alcohol HCCCPh2(OH) in the presence of ammonium hexafluorophosphate leads to the formation of cationic osmiumallenylidene complex CpOs(CCCPh2)(PPh3)2]PF6] (1), but when the dimethylpropargylic alcohol HCCCMe2(OH) was used as a substrate, a dicationic diosmium vinylidene-alkylidene complex of the formula (CpOs)2(μ-C10H12)(PPh3)4]PF6]2 (2) was obtained. The structures of these complexes have been determined by X-ray diffraction. Complex 1 crystallizes in monoclinic space group P21/c with a=13.4083(6) Å, b=19.5700(9) Å, c=20.3806(9) Å and β=100.3620(10)°. Complex 2 crystallizes in triclinic space group  with a=13.0396(11) Å, b=15.2420(13) Å, c=21.6406(19) Å and α=72.5290(10)°, β=75.1960(10)°, γ=85.6360(10)°. |
| Keywords: | Osmium Allenylidene Vinylidene Alkynols Cyclopentadienyl |
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