Synthesis, characterization and magnetochemical studies of some copper(II) complexes derived from n -salicylidene- n -alkanoylhydrazins: X-ray crystal and molecular structure of bis [monochloro-(μ- n -salicylidenemyristoylhydrazine)ono(−1)] dicopper(II)

摘要: Abstract Three types of copper(II) complexes, [Cu(HL)Cl · H2O] · xH2O, [{Cu(HL)Cl}2] and [{Cu(L)}2], derived from N-Salicylidene-n-alkanoylhydrazines (H2L) have been synthesized characterized by elemental analyses, infrared spectra field desorption mass as well variable temperature magnetic susceptibility measurements. The X-ray molecular structure bis[monochloro(μ-N-salicylidene myristoylhydrazine)ONO′(−1)]dicopper(II) showed that this complex is a centrosymmetric dimer in which each distorted square pyramidal environment coordinated the equatorial plane to ONO mononegative tridentate acylhydrazone ligand. fourth coordination site occupied symmetry related phenoxy oxygen other monomeric unit. chloride ion occupies fifth axial site. Magnetic measurements at different temperatures (5–298 K) hydrated chloro complexes [Cu(HL)Cl · H2O] · xH2O are no spin–spin interaction was detected, while anhydrous dimeric exhibit strong antiferromagnetic coupling with −2J values range 466–477 cm−1. neutral [{Cu(L)}2] also show antiferromagetic behaviour varying 170 243