1999 Fiscal Year Final Research Report Summary
STUDIES OF GERMANIUM-TRANSITION METAL BOND FORMATION
| Project/Area Number |
10640529
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic chemistry
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| Research Institution | Gakushuin University |
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Principal Investigator |
MOCHIDA Kunio GAKUSHUIN UNIVERSITY, FACULTY OF SCIENCE, PROFESSOR, 理学部, 教授 (20118772)
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| Co-Investigator(Kenkyū-buntansha) |
NANJO Masato GAKUSHUIN UNIVERSITY, FACULTY OF SCIENCE, Research Associate, 理学部, 助手 (50302352)
YOKOYAMA Yasuo GAKUSHUIN UNIVERSITY, FACULTY OF SCIENCE, Research Associate, 理学部, 助手 (40265575)
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| Project Period (FY) |
1998 – 1999
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| Keywords | Bis-germylaton / Digermylpatinum complex / Reductive elimination / T-type intermediate / Germanium-germanium bond / acetylenes |
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| Research Abstract |
Hexamethyldigermanes reacted with various alkynes in the presence of platinum complexes (0) at 120℃ to afford Z-bis(germyl)ethenes in moderate to good yields. Bis(germyl)platinum complexes (II) having various tertiary phosphine ligands have been prepared as a model of a key intermediate in the catalytic bis-germylation of alkynes and their structures have been established by spectroscopic methods and X-ray crystallography. Bis(germyl)platinum complexes reacted with phenylacctylene to give the corresponding insertion complexes, germyl(germylvinyl)platinum species, whose structures have been determined by spectroscopic and X-ray analysis. Germyl(germylvinyl)platinum complexes were found to liberate a bis-germylation product of the alkyne on heating. The result supports the mechanism involving oxidative addition of a digermane to Pt(0) complex, insertion of alkynes into one of the two Pt-Ge bonds to give a germyl(germylvinyl)platinum species, and reductive elimination of the bis-germylation product of the alkynes.
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