Synthesis, crystal structure and biological activities of four novel tetranuclear di-organotin(IV) carboxylates
摘要:
Four complexes: [Bu-2(L-1)SnOSn(L-1)Bu-2](2) (1), [Bu-2(L-2)SnOSn(L-2)Bu-2](2) (2), [Bu-2(L-3)SnOSn(L-3)Bu-2](2) (3), and [Bu-2(L-4)SnOSn(L-4)Bu-2](2) (4), (HL1 = 2-(4-methylbenzoyl)benzoic acid, HL2 = 2-(2,4-diethylbenzoyl)benzoic acid, HL3 = 2-(4-chlorobenzoyl)benzoic acid, HL4 = 2-(4-isopropylbenzoyl)benzoic acid) have been prepared and structurally characterized by means of elemental analysis and vibrational, H-1 NMR and FT-IR spectroscopies. The crystal structures of all complexes have been determined by X-ray crystallography. Three distannoxane rings are present to the dimeric tetraorganodistannoxane of planar ladder arrangement. Each structure is centro-symmetric and features a central rhombus Sn2O2 unit with two additional tin atoms linked at the O atoms. Complex 1 exhibited good antibacterial and antitumor activities and have a potential to be used as drugs. (C) 2009 Elsevier B.V. All rights reserved.