摘要
文合成了两个新型双核配合物,[Cu(Samen)Co(L)_2]和[Cu(Sampn)Co(L)_2],Samen^(4-)表示N,N′-双水杨酰代乙二胺根阴离子,Sampn^(4-)表示N,N＇-1,2-双水杨酰代丙二胺根阴离子,L表示5-硝基-1,10-菲咯啉(NO_2-Phen).经元素分析,IR和电子光谱等推定配合物具有酚氧桥结构,Cu(Ⅱ)及Co(Ⅱ)的配位环境分别为平面四方及畸变八面体构型.测定了配合物(4—300K)的变温磁化率,并用最小二乘法和从自旋Hamiltonian算符,H=2JS_1·S_2-DS_(?)1导出的磁方程拟合,求得交换参数为J=-4.39(samen)和-3.59cm^(-1)(Sampn),表明两个Cu(Ⅱ)-Co(Ⅱ)双核配合物中有弱的反铁磁性超交换相互作用.
New binuclear complexes, [Cu (Samen)Co(NO_2-Phen)_2] and [Cu(Sampn) Co(NO_2-Phen)_2]were synthesized,where Samen^(4-),Sampn^(4-) and NO_2-Phen denote N,N'ethylenedisalicylamidate anion N,N'-1, 2-propylenedisalicylamidate anion and 5-nitrol,10-phenanthroline respectively.Based on IR, elemental analyses and electronic spectra the complexes are proposed to have phenoxy-bridiged structure and to consist of a Cu(Ⅱ) in a planar environment and Co(Ⅱ) in a distorted octahedron.The complexes have been characterized with variable-temparature magnetic susceptibility (4—300K)and the data were least-squares fit to a susceptibility equation derived from spin Hamiltonian, H=2JS_1S_2-DS_(z1)~2.The exchange integral, J, was found to be - 4.39 em^(-1) for [Cu (Samen) Co (NO_2-Phen)_2] and-3.59cm^(-1) for [Cu (Sampn) Co (NO_2-Phen)_2], indicating that a weak antiferromagnetic superexchange interaction operates between the metal ions.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第4期360-364,共5页
Acta Chimica Sinica
基金
国家自然科学基金
