Room temperature tin-119 Mössbauer spectra of unassociated tin compounds
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 14,p. 1483-1486
- https://doi.org/10.1039/dt9750001483
Abstract
Room-temperature 119Sn Mössbauer spectra have been obtained for Ph3SnCl, Me2SnCl2, [Ph3SnMn(CO)5], Ph3Sn(bzbz), Ph4Sn, [Me4N][Ph3SnCl2], Me2Sn(acac)2, [{Fe(CO)2(cp)}2SnCl2], and [{Me2Sn(OH)NO3}2](acac and bzbz are the anions of acetylacetone and dibenzoylmethane). X-Ray crystal structures for all compounds except [Me4N][Ph3SnCl2] show no evidence for strongly associated polymeric structures. Because the magnitude of the Mössbauer effect is surprisingly large (ca, 1% absorption) in some cases, the observation of a room-temperature 119Sn spectrum can no longer be taken by itself as strong evidence for a polymeric structure. The quadrupole splittings indicate that Ph3SnCl remains four-co-ordinate from 80 to 295 K, while Me2SnCl2 becomes more weakly associated over the same temperature range. From the Goldanskii-Karyagin asymmetry in the room temperature spectrum of trans-Me2Sn(acac)2, the difference in mean square amplitudes parallel and perendicular to the Me–Sn–Me axis, < X∥ 2 > – < X⊥ 2 > = 2.8 ± 0.6 × 10–18 cm2, is in good agreement with the crystallographic value of 2.92 × 10–18 cm2.Keywords
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