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- W2080201591 abstract "Formation of radicals in tin-organic compounds of the type R 4 Sn (R : CH 3 , C 2 H 5 , C 2 H 6 , Cl, Br) as well as (CH 3 ) 3 SnCl and (CH 3 ) 3 Sn—Sn(CH 3 ) 3 irradiated with X-rays at 77°K has been investigated by ESR. The change of spectra after stepwise annealing of the sample shows that a least two types of radicals are present. In some cases trivalent tin radicals R′ (CH 3 ) 2 Sn (R': CH 3 or Sn (CH 3 ) 3 ) with an unpaired electron localized at the Sn atom with g=2.02 have been detected. A further radical of the type ≡Sn —CH 2 with a tin hyperfine structure of 132 and 160 Gauß resp. has been identified by the hyperfine structure of the magnetic 117 Sn- and 119 Sn-nuclei. A mesomeric stabilized radical in (C 6 H 5 ) 4 Sn is unusually stable, as the ESR spectrum did not change from 77°K till 423°K. The yield of radicals in (C 6 H 5 ) 4 Sn is smaller by two orders of magnitude than in aliphatic tin-organic compounds." @default.
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- W2080201591 date "1968-11-01" @default.
- W2080201591 modified "2023-10-12" @default.
- W2080201591 title "ESR-Untersuchungen zur Radikalbildung in röntgenbestrahlten zinnorganischen Verbindungen" @default.
- W2080201591 doi "https://doi.org/10.1515/zna-1968-1109" @default.
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