International Science Community Association Research Journal of Chemical Sciences 2231-606X 7 10 2017 10 18 Synthesis, characterization and thermal studies of mixed ligand mercury(II) complexes of N-hydroxymethylsaccharin (Sac-CH2OH) and phosphine or heterocyclic amine co-ligands 1 9 EN Subhi A. Al-Jibori 1 Chemistry Dept., College of Science, TikritUniversity, Tikrit, Iraq Mahmood M. Barbooti 2 Dept. Applied Science, University of Technology, P.O. Box 35045, Baghdad, Iraq Ahmed S.M. Al-Janabi 3 Dept Biochemistry, College of Veterinary Medicine, Tikrit University, Tikrit, Iraq A.H. Ali 4 Dept. Chemistry, College of Education, Ibnul-Haytham, University of Baghdad, Baghdad, Iraq N. Sami 5 Chemistry Dept., College of Science, TikritUniversity, Tikrit, Iraq Bakhtyar K. Aziz 6 Chemistry Department, University of Sulaimani, Sulaimani, Iraq S. Basak-Modi 7 Chemistry Dept., University College London, London WC1H 0AJ, UK > Research Paper 2017 5 1 2017 10 18 Reaction of mercury(II) acetate Hg(Ac)2 with two equivalents of N-hydroxymethylsaccharin (Sac-CH2OH) in the presence of NEt3 afforded the presumably tetrahedral complex [Hg(K2-Sac-CH2O)2] (1). Reaction of (1) with one equivalent of the bidentate ligands (L-L); Ph2P(CH2)nPPh2, (n=1 dppm; 2 dppe; 3 dppp; 4 dppb), Ph2P(S)(CH2)P(S)Ph2 (dppmS2) Ph2P(O)CH2CH2P (O)Ph2 (dppeO2), bipyridine (bipy) and phenanthroline (phen) afforded tetrahedral complexes of the type [Hg(K1-Sac-CH2O)2(L-L)]. The reaction with two equivalents of the monodentate ligands (L); Ph3P, Ph3PO, Ph3PS or pyridine (py) gave [Hg(K1-Sac-CH2O)2L2]. The N-hydroxymethylsaccharinate anion acts as a monodentate ligand to the mercury center through the hydroxymethyl oxygen atom. The complexes were characterized by physico-chemical and spectroscopic methods. The thermal decomposition of six of the prepared complexes were studied using thermogravimetry (TG) and differential thermal analysis (DTA). [Hg(K1-Sac-CH2O)2(bipy)] showed a higher thermal stability. Copyright@ International Science Community Association