Hypercoordinated eka-tin materials with dangling aryl-methoxy and -methylthio ligands exhibiting intramolecular secondary bonding and aryl bond stabilization in reactions with organotin chlorides

Abstract

The syntheses of [2-(CH₃ECH₂)C₆H₄]PbPh_3−nCl_n, (n = 0, E = O (4), E = S (5); n = 1, E = O (6), E = S (7); n = 2, E = O (8), are described. NMR and single crystal data illustrate significant Pb⋯E interactions increasing as n progresses from 0 to 2. The Pb⋯E interactions stabilize the Pb–aryl bonding to the extent that the reactions of 4 and 5 with Me₂SnCl₂ result in interchange of a Ph group and Cl to produce 6 and 7, respectively, together with Me₂PhSnCl.