名称:
Syntheses, structures, and magnetic properties of two new μ-alkoxo-μ-pyrazolato bridged dicopper(II) complexes
摘要:
The syntheses, structures, and magnetic properties of two new mu-alkoxo-mu-pyrazolato heterobridged compounds, [Cu-2(II)(L-1-F)(mu-prz)] (1) and [Cu-2(II)(L-1-2OMe) (mu-prz)](.)0.5 CH3CN (2) (prz = pyrazolato; H2L1-F = 1,3-bis(3-fluorosalicylideneamino)-2-propanol; H2L1-2OMe = 1,3-bis(4,6-dimethoxy salicylideneamino)-2-propanol) have been reported. Compound 1 crystallizes in trichnic P (1) over bar space group with a = 8.6392(10) Angstrom, b = 10.6431(9) Angstrom, c = 11.6809(13) Angstrom, alpha = 85.972(8)degrees, beta = 71.492(9)degrees, and gamma = 72.221(9)degrees, while the unit cell parameters of 2 are as follows: space group: monoclinic C2/c, a = 28.2948(5) Angstrom, b = 7.3033(2) Angstrom, c = 26.3933(5) Angstrom, and beta = 96.243(1)degrees. The variable-temperature magnetic Susceptibility measurements reveal that the metal centers in both the compounds are antiferromagnetically coupled with J = -200 cm(-1) for 1 and J = - 175 cm(-1) for 2. The magnetic behaviors have been explained on the basis of two opposing factors, complementarity and countercomplementarity of magnetic orbitals. (C) 2003 Elsevier B.V. All rights reserved.