Self-assembly syntheses and crystal structures of triorganotin(IV) pyridinecarboxylate: 1D polymers and a 42-membered macrocycle

A series of new triorganotin(IV) pyridinecarboxylates with 6-hydroxynicotinic acid (6-OH-3-nicH), 5-hydroxynicotinic acid (5-OH-3-nicH) and 2-hydroxyisonicotinic acid (2-OH-4-isonicH) of the types: [R3Sn (6-OH-3-nic)center dot L](n) (I) (R = Ph, L = Ph center dot EtOH, 1; R = Bn, L = H2O center dot EtOH, 2; R = Me, L = 0, 3; R = n-Bu, L = 0, 4), [R3Sn (5-OH-3-nic)](n) (II) (R = Ph, 5; R = Bn, 6; R = Me, 7; R = n-Bu, 8), [R3Sn (2-OH-4-isonic center dot L)](n) (III) (R = Bn, 9, L = MeOH; R = Me, L = 0, 10; R = Ph, 11, L = 0.5EtOH) have been synthesized. All the complexes were characterized by elemental analysis, TGA, IR and NMR (H-1, C-13, Sn-119) spectroscopy analyses. Among them, except for complexes 5 and 6, all complexes were also characterized by X-ray crystallography diffraction analysis. Crystal structures show that complexes 1-10 adopt 1D infinite chain structures which are generated by the bidentate O, O or N, O and the five-coordinated tin centers. Significant O-H center dot center dot center dot O, and N-H center dot center dot center dot O intermolecular hydrogen bonds stabilize these structures. Complex 11 is a 42-membered macrocycle containing six tin atoms, and forms a 2D network by intermolecular N-H center dot center dot center dot O hydrogen. (C) 2009 Elsevier B.V. All rights reserved.