| Popis: |
A Schiff base ligand (2-{(E)-[2-bromoethyl)imino]methyl}-6-methoxy phenol ( LH ) has been synthesized and characterized by NMR, IR spectroscopy and elemental analysis. The reaction of LH with nickel acetate tetrahydrate results in the formation of a nickel(II) complex ( 1 ). The ligand ( LH ) has been converted into a heterocyclic moiety, 9-methoxy-2,3-dihydro-1,4-benzoxyzepine ( L ) in 1 and coordinated to nickel(II) ion. Ligand substitution reaction of 1 with 3-aminopyridine leads to the formation of 3-aminopyridine derivative of complex 1 , [{3-(NH 2 -Py)} 4 Ni(H 2 O) 2 ]Br 2 ⋅2(CH 2 Cl 2 ) ( 2 ). Complexes 1 and 2 were characterized by using standard analytical techniques and their solid-state structures were confirmed by single crystal X-ray diffraction studies. Complex 1 crystallizes in orthorhombic space group P ccn with cell dimensions of a = 7.8483(10) A, b = 30.662(3) A, c = 9.3872(11) A, Z = 4 and complex 2 crystallizes in orthorhombic space group F ddd with cell dimensions of a = 8.8108(4) A, b = 21.0583(11) A, c = 34.1913(17) A, Z = 8. The optical properties and thermogravimetric analyses of complexes 1 and 2 are also reported. |
Full Text from ScienceDirect