The novel example of organotin(IV) metallacrowns: Syntheses, characterizations and crystal structures of [12-MC_([RSn(IV)]N(shi)4] complexes (R = Et, Bu, Ph; Shi = salicylhydroxamic acid)

摘要

Three 12-metallacrown-4(12-MC-4) organotin(IV) complexes [12-MC_([RSn(IV)]N(shi))-4] (R = Et(1), Bu(2),Ph (3); Shi = salicylhydroxamic acid) have been synthesized and characterized by elemental analyses, IR, TGA and X-ray diffraction. Single-crystal X-ray analyses reveal that all the complexes 1-3 contain a neutral 12-membered metallacrown ring which is formed by the succession of four repeating units of -[Sn-N-O]-. The metallacrown molecules of complexes 1 and 2 are further linked by intermolecular C-H-O interactions to form a 2D supramolecular networks, while the molecules of complex 3 are linked by intermolecular C-H-O and C-H-n interactions to form a 3D framework.