Tuesday, May 20, 2008 - 4:20 PM
Medical Arts Building, Rm M-134 (Queensborough Community College)
474

Reactions of Inorganic Tin (IV) and Lead (II) Compounds with Mono- and Bi-Dentate Ligands Having Nitrogen and Oxygen Donors

Burl C. Yearwood, Emily Bouret, and Ronke Alo. LaGuardia Community College (CUNY), Long Island City, NY

It is proposed that Tin(IV) Chloride pentahydrate and Lead(II) Chloride will react with ortho and para aminophenol, p-toluidine (4-aminotoluene), and 2-tert-butyl-4-methylphenol either via an elimination reaction or by adduct formation. The inorganic tin and lead compounds were reacted with the ligands in an alcoholic medium under aerobic conditions. The effect of temperature, differing mole ratios of metal to ligand, and reaction times were examined. The products of the metal-ligand reactions were characterized by melting points and Fourier Transform Infra-Red (FT-IR) spectroscopy. Solubility tests were also carried out. Melting point tests confirmed that the final products were different from the starting materials. Melting point tests, at various times after the reaction, showed that the products were relatively air-stable. Infra-red spectroscopy revealed that there was oxygen bonding to the Tin(IV) or Lead(II) moiety after replacement of the phenolic hydrogen, and that there was nitrogen bonding to the Tin(IV) or Lead(II) moiety after replacement of the aromatic amino hydrogen. The FT-IR spectra showed the disappearance of absorption bands corresponding to the phenolic OH group and/or aromatic amino group in the starting material. The FT-IR spectra also showed the appearance of tin-oxygen and tin-nitrogen absorptions. These results demonstrate that Tin(IV) Chloride pentahydrate and Lead(II) Chloride react with the mono and bi-dentate ligands used in this study to produce complexes via an elimination reaction, rather than adduct formation.