1989 Fiscal Year Final Research Report Summary
Construction of Hypervalent Organometalloidal Systems in Main-group Elements and Exploration of their New Reactions
| Project/Area Number |
63470017
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機化学一般
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
AKIBA Kin-ya Hiroshima University, Faculty of Science Professor, 理学部, 教授 (20011538)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Metalloidal Main-group Element / Hypervalency / Highly Coordinated Compound / Antimony / Bismuth / Ate Complex / Transannular Interaction / Reductive Elimination Reaction |
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| Research Abstract |
1. Various hypervalent compounds of metalloidal main-group elements (Sn, Sb, Bi etc.) were synthesized by using a specially designed bidentate ligand (Martin's ligand). Treatment of these hypervalent compounds with organolithiums or Grignard reagents converted then into the corresponding ate complexes (12-Sb-6, 12-Bi-6).
1) Halogenation,of the hypervalent antimony compounds (10-Sb-5) was investigated. Structure of ate complexes (12-Sb-6) and their isomerization mechanism were determined on the basis of spectral data.
2) A stable ate complex of bismuth (12-Bi-6) was prepared and its chemical behaviors were investigated.
3) Some ate complexes of tin (10-Sn-5) were prepared and their structure was clarified according to the NMR spectrum features.
2. Various azocine derivatives containing antimony or bismuth atom were synthesized by means of a new type tridentate ligand.
1) Transannular hypervalent interaction and bond formation was investigated on the basis of Hammett's linear relationship in NMR chemical shift of N-methyl group using. sigma m substituent constants.
2) Isomerization of stable geometry around main-group elements was discussed and reductive elimination in bismuth compounds was also studied.
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Research Products
(10 results)
