IJSR - International Journal of Scientific Research

Dinesh Kumar; Anju Gupta

Volume : II, Issue : V, May - 2013

Physico–Chemical Studies on the Coordination Compounds of N–(2–Carbamoyl–Furanyl) –C–(3‘–Carboxy–2‘–Hydroxyphenyl) Thiazolidin–4–One

Dinesh Kumar, Anju Gupta

Abstract :

An equimolar mixture of 3–formylsalicylic acid and furoic acid hydrazide upon refluxing in MeOH forms the Schiff base (1). The latter upon reacting with mercaptoacetic acid in dry benzene, undergoes cyclization and forms N–(2–carbamoylfuranyl)–C–(3‘–carboxy–2‘–hydroxyphenyl)thiazolidin–4–one, LH3 (2). A MeOH solution of 2 reacts with Mn(II), Cu(II), Cd(II), Zr(OH)2(IV) and UO2(VI) ions and forms the coordination compounds, [Mn(LH)(MeOH)2] (3), [Cu(LH)]2 (4), [Cd(LH)] (5), [Zr(OH)2(OAc)2(LH3)] (6) and [UO2(NO3)(LH2)(MeOH)] (7) respectively. The coordination compounds have been characterized on the basis of elemental analyses, molar conductance, molecular weight, spectral (IR, reflectance and ESR) studies and magnetic susceptibility measurements. 2 behaves as a neutral tridentate ONO donor ligand in 6, monobasic tridentate ONO donor ligand in 7, dibasic tridentate OOS donor ligand in 4 and dibasic tetradentate OONO donor ligand in 3 and 5. The coordination compound 4 is a dimer, while all other coordination compounds are monomers in diphenyl. The absolute coordination number each of Cu(II) and Cd(II) ions is 4 in 4 and 5 respectively and that of Mn(II) is 6 in 3. The Zr(OH)2(IV) and UO2(VI) ions have the coordination numbers 7 and 8 in 6 and 7 respectively. A square–planar structure for 4, a tetrahedral structure for 5, an octahedral structure for 3, a pentagonalbipyramidal structure for 6 and a square–antiprism structure for 7 are proposed.