| Project/Area Number |
06640677
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Organic chemistry
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| Research Institution | Kinki University |
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Principal Investigator |
FUJIHARA Hisashi Kinki University, Environmental Science, Assoc.Professor, 環境科学研究所, 助教授 (30190101)
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| Co-Investigator(Kenkyū-buntansha) |
FURUKAWA Naomichi University of Tsukuba, Chemicstry, Professor, 化学系, 教授 (80015966)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Hypervalent bond / Heteroatom / Transannular interaction |
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| Research Abstract |
We have found that the transannular or peri interaction between multi heteroatoms of cyclic chalcogenides can produce the hypervalent species. The results are summarized as follows.
The chemistry of compounds having a double bond between two chalcogen atoms has been a subject of growing interest. The crystal structure of the first isolable selenotelluroxide from N-benzyl-5H,7H-dibenzo [b, g] [1,5] tellurazocine shows significant double bond character in the Te=Se moiety. The reaction of thiotelluroxide of N-methyl-5H,7H-dibenzo [b, g] [1,5] tellurazocine with SOCl_2 gave the Te-chloro-ammoniotellurane. The transannular Te-N interaction of those heteroxycles provides the first stable heavier chalcogenotelluroxides which can convert into the ammoniotelluranes as new types of hypervalent organotellurium compounds.
Reaction of a selenoxide, 1-methylseleninyl-8-dimethylaminonaphthalene, with acetic anhydride gave exclusively the Se-demethylated product, the corresponding selenenyl acetate, although the reaction of methyl phenyl selenoxide with acetic anhydride gives the alpha-acetoxymethyl phenyl selenide without demethylation. The X-ray crystal structure of the stable selenenic anhydride derived from hydrolysis of the selenenyl acetate shows the strong intramolecular interactions between selenium and nitrogen atoms.
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