Self-assembled diorganotin(IV) moieties with 2,3,4,5-tetrafluorobenzoic acid: Syntheses, characterizations and crystal structures

摘要

A series of new organotin(IV) derivatives with 2,3,4,5-tetrafluorobenzoic acid: {[(2,3,4,5-F4C6HCO2)R2Sn](2)O}(2) (R = Et 1, n-Bu 2, Ph 3), [R2Sn(O2CC6F4H)(2)](n) (R = n-Bu 4, Et 5, Ph 6), and Sn2R4(O2CC6F4H)(3)(OH) (R = Et 7, n-Bu 8, Ph 9), were synthesized by the reaction of diorganotin oxide and 2,3,4,5-tetrafluorobenzoic acid. All the complexes 1-9 have been characterized by elemental analysis, IR, H-1, C-13, Sn-119 NMR spectra. Among them complexes 2, 4, 8 were also characterized by X-ray crystallography diffraction analyses. The crystal structure of complex 2 exhibited a tetra-nuclear geometry with the Sn2O2 symmetry core. Complex 4 formed a 1D helical double-chain structure through intermolecular O -> Sn coordinating and completed a DNA-like assembly. Complex 8 revealed that the both Sri atoms were held together by hydroxide and acetate bridges, forming a chair-like six-membered ring. Moreover, the supramolecular structures of dimer, 1D chain or 2D network have been found in complexes 4 and 8 by intermolecular C-(HF)-F-... weak hydrogen bond and non-bonded (FF)-F-... or (FSn)-Sn-... interaction, which were highly effective in the assembly of supramolecular structures and could lead to the formation of complexes with fascinating topologies properties. (c) 2006 Elsevier B.V. All rights reserved.