Chiral organotin (IV) carboxylates complexes: Syntheses, characterization, and crystal structures with chiral (S)-(+)-6-methoxy-α-methyl-2-naphthaleneaceto acid ligand

Eight new organotin (IV) carboxylates, (R3Sn)4(nap)4 (R = Me 1, n-Bu 2), [(R3Sn) (nap)]n (R = Ph 3, PhCH24), (R2Sn) (nap)2 (R = n-Bu 5, Ph 6, PhCH27) and {[R2Sn(nap)]2O}2 (R = Me 8) (nap = (S)-(+)-6-methoxy-α-methyl-2-naphthaleneaceto anion) have been synthesized. All of the complexes have been characterized by elemental analysis, FT–IR, NMR (1H, 13C and 119Sn) spectra. Among these complexes, complexes 1, 3, 5 and 8 were also characterized by X-ray crystallography diffraction analysis, and the data of X-ray crystallography diffraction indicated that complexes 1, 3 and 5 are new chiral organotin (IV) carboxylates complexes. The structural analyses show that complex 1 has a tetranuclear Sn4O8 macrocycle structure, complex 3 has a 1D spring-like chiral helical chain with a columnar channel, complex 5 possesses a dimer structure, and complex 8 has a supramolecular chainlike ladder structure through weak intermolecular non-covalent O…O interactions.

Graphical abstractEight new organotin (IV) carboxylates, (R3Sn)4(nap)4 (R = Me 1, n-Bu 2), [(R3Sn) (nap)]n (R = Ph 3, PhCH24), (R2Sn) (nap)2 (R = n-Bu 5, Ph 6, PhCH27) and {[R2Sn(nap)]2O}2 (R = Me 8) (nap = (S)-(+)-6-methoxy-a-methyl-2-naphthaleneaceto anion) have been synthesized. All of the complexes have been characterized by elemental analysis, FT–IR, NMR (1H, 13C and 119Sn) spectra. Among these complexes, complexes 1, 3, 5 and 8 were also characterized by X-ray crystallography diffraction analysis. Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Eight organotin(IV) carboxylates complexes have been synthesized with chiral ligand. ► The chiral ligand is (S)-(+)-6-methoxy-α-methyl-2-naphthaleneacetic acid. ► Complexes 1, 3, 5 and 8 were characterized by X-ray crystallography diffraction. ► However, Complexes 1, 3 and 5 are new chiral organotin(IV) carboxylates complexes. ► They have potential value in biomedical aspects of medicine.