Some Pb(II) complexes of 2, 6-bis (Hydroxymethyl) Pyridine with different Pb(II) Salts involving the anions chloride, Perchlorate and Nitrate. A Photoelectron spectroscopic study

Abstract

Some Pb(II) complexes of 2, 6-bis(hydroxymethyl)pyridine (dhmp) with different Pb(II) salts [PbCl2.6H2O, Pb(ClO4)2.6H2O, Pb(NO3)2.3H2O] are synthesized and characterized and studied by IR, NMR and mass spectroscopy. The distortion of the coordination polyhedron, dependent on the anion kind influence on the distribution of donor sites and the formation of mononuclear complexes. There is no case the contortions of Pb(II) salt or water of hydration were found in the coordination sphere. Spectroscopy data shows that complexes are mononuclear 2: 1 (L: M) complexes. The ligand dhmp components is mono-deprotonated and act as anionic ligand. The complex number 4 show same behavior. But in 1, 2 and 4 complexes it behave as neutral ligand. The basal planes are occupied by O donors and N atoms are in the axial positions of Octahedral in 3 and 4 the basis are formed by two O and two N donor atoms, and O atoms are in the axes. Complex 3 shows the N atoms in trans position but 4 shows N atoms in cis position. Complexes (1–4) shows packing and cationic complex unit is strong and weak hydrogen bond interactions involving the contortions and hydroxyl hydrogen atoms or aromatic hydrogen atoms to stabilize the complexes.