Hydrothermal synthesis, structures, luminescence and magnetic properties of Zn(II) and Cu(II) complexes with new hydrazone ligand
摘要:
Two new complexes [Zn(HL)(2)(PY)(2)] (1) and [Cu(HL)](2) (2) have been synthesised from a bidentate Schiff base ligand HL (benzylidene acetophenone benzoyl hydrazone). The crystal structures of complex 1 and complex 2 were determined by single-crystal X-ray diffraction. The data indicate that: the complex 1 crystallizes in the monoclinic space group P2(1)/n, with a (nm) = 1.35816(8), b (nm) = 2.39486(13), c (nm) = 1.41368(8), alpha (degrees) = 90, beta (degrees) = 96.0840(10), gamma (degrees) = 90, Z = 4. The complex 2 crystallizes in the triclinic space group P-1, with a (nm) = 1.02483(8), b (nm) = 1.35797(11), c (nm) = 1.38271(11), alpha (degrees) = 71.5020(10), beta (degrees) = 78.5850(10), gamma (degrees) = 74.3110(10), Z = 1. Moreover, the unsaturated coordination site of metal ion is occupied by secondary ligand of pyridine. The mononuclear units in 1 and 2 are packed through weak C-H center dot center dot center dot pi and pi-pi interactions respectively. The results of analytical, IR and TG analysis studies are presented in this paper. Both the ligand and complex 1 show fluorescence in DMF solutions at room temperature. The complex 2 variable-temperature (300-1.8 K) magnetic test show that there is ferromagnetic intramolecular interaction and weak antiferromagnetic intermolecular interaction. (C) 2011 Elsevier B.V. All rights reserved.
A highly efficient P‐stereogenic diphosphine–rhodium complex was applied to the chemo‐ and enantioselectivehydrogenation of allylic hydrazones for the synthesis of chiral allylic hydrazines in 89–96 % yields and with 82–99 % ee values. This methodology was successfully applied to the preparation of versatilechiral allylic amine derivatives.