| Project/Area Number |
06640716
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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 |
Inorganic chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SHIMOI Mamoru The University of Tokyo, College of Arts and Sciences, Professor, 教養学部, 教授 (30092240)
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| Co-Investigator(Kenkyū-buntansha) |
KAWANO Yasuro The University of Tokyo, College of Arts and Sciences, Assistant, 教養学部, 助手 (10262099)
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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: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1994: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | borylene / borane / boryl / metal complex / metal clusters / ボリレン錯体 / ボリル錯体 / ボラン錯体 |
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| Research Abstract |
[Co_2 (CO)_8] reacted with B_2H_4・2PMe_3 to form a borylene complex [Co_7 (CO)_7 (BHPMe_3)] where borylene is stabilized by the phosphine. This is the first example of a borylene bridged dinuclear complex. B-H and B-B bond fission accompanied the reaction. This is in contrast to hitherto known coordination compounds of electron precise boranes such as BH_3・PMe_3 and B_2H_4・2PMe_3 in which B-H or B-P bonding are kept intact. Ultraviolet irradiation of methyl complexes, [CpWMe (CO)_3] and [CpFeMe (CO)_2] which are electron-rich with cylopentadienyl group in the presence of BH_3・PMe_3 liberated methane to form boryl complexes [CpW (BH_2PMe_3) (Co)_3] and [CpFe (BH_2PMe_2)], respectively. These reactions were accompanied by the B-H bond cleavage. Phtochemical reaction of [Cr (CO)_6] in the presence of BH_3・PMe_2CH_2PMe_2・BH_3 gave a five-membered diborane derivative by the dehydrogenation and B-B bond formation, which coordinated two chromium moieties through four Cr-H-B bonds to form [{Cr (CO)_4}_2 (BH_2BH_2PMe_2CH_2PMe_2)]. The structure was analyzed by the X-ray crystallography. This cluster can be regarded as a dimetalatetraborane derivatives. Reaction of [Cp^*RuCl]_4 with BH_3・PMe cleaved a strong B-P bond followed by the Cl atom transfer to give a chlorotrihidroborato complex. This complex is expected to be a versatile starting material for the formation of borylene complex because it has a reactive B-Cl bond.
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