CHEMISTRY OF ORGANOSILICON COMPOUNDS .281. PHOTOINDUCED ELECTRON-TRANSFER REACTION OF POLYSILANES - INTRAMOLECULAR TRAPPING OF A TRANSIENT SILYL RADICAL CATION WITH A NUCLEOPHILE
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作者:
NAKADAIRA, Y
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机构:TOHOKU UNIV, FAC SCI, DEPT CHEM, SENDAI, MIYAGI 980, JAPAN
NAKADAIRA, Y
SEKIGUCHI, A
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机构:TOHOKU UNIV, FAC SCI, DEPT CHEM, SENDAI, MIYAGI 980, JAPAN
SEKIGUCHI, A
FUNADA, Y
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机构:TOHOKU UNIV, FAC SCI, DEPT CHEM, SENDAI, MIYAGI 980, JAPAN
FUNADA, Y
SAKURAI, H
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机构:TOHOKU UNIV, FAC SCI, DEPT CHEM, SENDAI, MIYAGI 980, JAPAN
SAKURAI, H
机构:
[1] TOHOKU UNIV, FAC SCI, DEPT CHEM, SENDAI, MIYAGI 980, JAPAN
[2] TOHOKU UNIV, FAC SCI, ORGANOSILICON RES LAB, SENDAI, MIYAGI 980, JAPAN
The radical cation, produced in photo-induced electron transfer of polysilanyl alkanols, can be trapped efficiently intramolecularly with the hydroxyl group. The silyl radical generated in the process is trapped by the solvent employed. A good Hammett relationship is observed in aryldisilanylalkanols between the relative reactivities of the Si-Si bond and sigma+ constants of the substituent on the aryl group.