Chlorine-35 nuclear quadrupole resonance studies on some tin(IV) chloride adducts
Abstract
The 35Cl n.q.r. spectra of a series of tin(IV) chloride adducts SnCl4·2L [L = MeCN, CH2CHCN, ButCN, PhCN′ CH2(CN)2, 1,2-C6H4(CN)2, SMe2O, or tht (tetrahydrothiophen)] have been recorded at various temperatures and used to deduce whether these complexes are cis or trans. A trans structure is indicated for SnCl4·2tht, cis structures for the remainder. When compared with other published n.q.r. and structural data, our results indicate that the 35Cl n.q.r. frequencies are related to the Sn–Cl bond lengths in such systems. The higher 35Cl n.q.r. frequencies tend to be associated with the shorter bonds, though the frequencies also vary markedly with temperature.