Drum-shaped mono-organooxotin assembly through solvothermal synthesis with 2,3,4,5-tetrafluorobenzoic acid: crystal structure, hydrogen bonding and π–π stacking interactions

Abstract

A drum-shaped organooxotin (IV) complex with 2,3,4,5-tetrafluorobenzoic acid of the type {[SnR2(2,3,4,5-F4C6HCO2)]O}6 (R = m-Cl-PhCH2) has been solvothermally synthesized and structurally characterized by elemental, IR, 1H, 13C, 119Sn NMR spectra and X-ray crystallography diffraction analysis. This complex exhibits a new structural environment appearing as a “drum” arrangement with hexa-coordinated tin atoms in a four-membered stannoxane ring, (–Sn–O–)2, as a common structural feature. Each tin(IV) displays a distorted octahedral geometry. Weak, but significant, intramolecular C–H ··· F hydrogen bonds and π–π stacking interactions are shown. These contacts lead to aggregation and supramolecular self-assembly. Cleavage of Sn–C bond occurred in complexes under the influence of strong acid.