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- Author or Editor: C. Obayashi x
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Abstract
Unusually broad119Sn-Mössbauer absorption was observed in pure Sn(CH3)4 or Sn(CH3)4/argon condensed at low temperatures by pulsed deposition. Such broadening of the Mössbauer linewidth suggested the presence of large quadrupole splitting due to possible distortion of molecular structure as deposited in the argon matrix.
Abstract
The structure of chlorotrimethylstannane was studied by Mössbauer spectroscopy in solids, frozen solution, and argon matrices at low temperatures. In frozen solutions, quadrupole splitting was very similar to the value in solid phase, and strong intermolecular interaction may exist between Sn/CH3/3Cl and solvent molecules. In argon matrices, the quadrupole splitting of Sn/CH3/3Cl was much smaller. Comparison of the observed quadrupole splitting with the predicted value based on the point charge model suggests that the Sn/CH3/3Cl molecule may have a tetrahedral structure and be isolated well from each other in the argon matrix.
Abstract
Mössbauer parameters of tin compounds, Sn(CH3)nCl4–n (n=0, 1, 2, 3, 4), isolated in low temperature matrices are correlated with electronic properties at the tin nuclei obtained by molecular orbital calculations. The Mössbauer isomer shift and quadrupole splitting show good correlation with electron density and electric field gradient estimated by molecular orbital calculations, respectively. Structures of novel species (Sn(CH3)2CH2 and [Sn(CH3)2CH2]2) produced via photodissociation of Sn(CH3)4 in low temperature matrices were estimated by means of molecular orbital calculations as compared with Mössbauer parameters.
