Structure of five-co-ordinate SnIV isomers from Mössbauer quadrupole splittings

Abstract

The three isomers of trigonal bipyramidal R₃SnL₂ have been distinguished by linear regression analysis of new ¹¹⁹Sn quadrupole splitting data for five-co-ordinate R₃SnL₂ and six-co-ordinate R₂SnL₄ species, showing that the five-co-ordinate systems have splittings ranging from ca. 1.7–2.3 mm s^–1 for cis-R₃SnL₂, ca. 3.0–3.9 mm s^–1 for equatorial-R₃SnL₂, and ca. 3.5–4.1 mm s^–1 for mer-R₃SnL₂.