Studies in Mössbauer spectroscopy. Part VII. Tin-119 and iron-57 spectra of compounds involving tin bonded to chromium, molybdenum, tungsten, manganese, iron, or cobalt

Abstract

New ¹¹⁹Sn and ⁵⁷Fe Mössbauer data for the compounds [SnX₃{M(CO)₃(cp)}], [SnX₂{M(CO)₃(cp)}₂], and [SnX₂{M(CO)₃(cp)}{Fe(CO)₂(cp)}](M = Cr, Mo, or W; X = Cl, Br, or I) are presented. The quadrupole splitting (q.s.) data for these and other tin–transition metal compounds are analysed by the point-charge method to obtain partial quadrupole splitting values for the halide and metal groups in tetrahedral co-ordination to tin, and the causes of the, sometimes large, discrepancies between calculated and observed q.s.s for the dihalides are examined. It is concluded that further refinement of the model is not justified.