Mössbauer studies of trimethyl and triphenyl tin chloride adsorbed on grafoil

Trimethyl tin chloride [(CH3)3SnCl] and triphenyl tin chloride [(C6H5)3SnCl] adsorbed on grafoil were studied by the Mössbauer resonance in 119Sn. The temperature dependence of the Mössbauer fraction and the anisotropy ratio of the quadrupole transitions in (CH3)3SnCl measured at two different angles supplied information on the structure of the substrate and on the anisotropy of the recoilless fraction. The relative orientation of (C6H5)3SnCl adsorbed on grafoil was found to be with the Sn–Cl axis perpendicular to the exposed basal planes of grafoil, contrary to (CH3)3SnCl, where the molecules have their symmetry axes parallel to the grafoil plane.