Synthesis, structural characterization and thermal stabilities of two triphenyltin (IV) carboxylates based on naphthalimide derivatives

The reaction of triphenyltin (IV) hydroxide with the naphthalimide derivatives, 5-(1,3-dioxo-1H,3H-benzo[de]isoquinolin-2-yl)-isophthalic acid (H2L1) and 4-(1,3-dioxo-1H,3H-benzo[de]isoquinolin-2-yl)-benzoic acid (HL2) yielded the complexes [(SnPh3)2L1·2C7H8] (1), and [(SnPh3)L2] (2), respectively. All complexes were characterized by elemental analysis, FT-IR, NMR (1H, 13C) spectroscopy and X-ray crystallography diffraction analysis to elucidate their structures both in solution and in solid state. The structural analysis showed that complexes 1 and 2 were monomeric structures and further interlinked by intermolecular CH⋯O hydrogen bonds. The molecule of 1 was linked by CH⋯O hydrogen bonds into a 1D chain, which was also interconnected by CH⋯O interactions to aggregate in 2D framework. In complex 2, two molecules of 2 linked by CH⋯O hydrogen bonds formed a 12-membered ring. Additionally, these rings were connected via other intermolecular hydrogen bonds into a 1D chain. Their thermal stabilities were also investigated.