Synthesis, crystal structure, and characterization of dimeric tetraorganodistannoxane and two tricyclohexyltin carboxylates

摘要

Three diorganotin(IV) series and triorganotin(IV) complexes, [(C_6H_(11))_2Sn]_4(L_1)_2O_2(OH)_2 (1), (C_6H_(11))3Sn(HL_2) (2), and (C_6H_(11_)_3SnL_3 (3) (where HL_1 is 2-(4-isopropyl benzoyl) benzoic acid, H_2L_2 is phthalic acid and HL_3 is 2-benzoyl benzoic acid), were synthesized and their crystal structures were determined. There are four crystallographically unique Sn centers in the structure of 1, which consists of a Sn_4O_2(OH)_2 ladder unit, and the ladder consists of four tins held together by two μ_3-oxygens and two μ_2-oxygens. The supermolecular motif of 1 is a 2-D structure linked by O–H···O hydrogen bonds. The asymmetric unit of 2 contains two crystallographically independent monomers. The supramolecular architecture of 2 is a 2-D layer structure linked by face-to-face π–π interactions between phenyl rings of adjacent L_2 anions. The structure of 3 contains one tricyclohexyltin cation and one L_3 anion. The Sn···O interactions lead the whole structure to a supramolecular chain. Elemental analysis, infrared,and ~1H NMR of 1–3 were investigated and discussed.