Structural diversity of di and triorganotin complexes with 4-sulfanylbenzoic acid: Supramolecular structures involving intermolecular Sn⋯O, O–H⋯O or C–H⋯X (X = O or S) interactions

Abstract

Twelve new organotin complexes with 4-sulfanylbenzoic acid of two types: R n Sn[S(C 6H 4COOH)] 4− n ( I) ( n = 3: R = Me 1, n-Bu 2, Ph 3; PhCH 2 4; n = 2: R = Me 5; n-Bu 6, Ph 7, PhCH 2 8) and R 3Sn(SC 6H 4COO)SnR 3 · mEtOH ( II) ( m = 0: R = Me 9, n-Bu 10, PhCH 2 12; m = 2: R = Ph 11), along with the 4,4′-bipy adduct of 9, [Me 3Sn(SC 6H 4COO)SnMe 3] 2(4,4-bipy) 13, have been synthesized. The coordination behavior of 4-sulfanylbenzoic acid is monodentate in 1– 8 by thiol S atom but not carboxylic oxygen atom. While, in 9– 13 it behaves as multidenate by both thiol S atom and carboxylic oxygen atoms. The supramolecular structures of 6, 11 and 13 have been found to consist of 1D molecular chains built up by intermolecular O–H⋯O, C–H⋯O or C–H⋯S hydrogen bonds. The supramolecular aggregation of 7 is 2D network determined by two C–H⋯O hydrogen bonds. Extended intermolecular C–H⋯O interactions in the crystal lattice of 9 link the molecules into a 2D network.