SYNTHESIS, STRUCTURE AND MAGNETISM OF μ-OXAMIDO BINUCLEAR COPPER(Ⅱ) COMPLEXES

Two new binuclear copper(Ⅱ) complexes, [Cu(oxpn)CuL](ClO_4)_2, have been synthesizedand characterized, where oxpn is N,N' bis(3-aminopropyl)oxamido and L is 1,10-phenan-throline (phen) or 5-nitro-1,10-phenanthroline (NO_2-phen). The crystal structure and vari-able-temperature magnetic susceptibility (4- 300 K) of the Complex (L=phen) have beendetermined. Crystal data: orthorhombic system, space group Pnma, with a = 10.433(1), b11.458(2), c = 21.999(2)A, z = 4. Every copper(Ⅱ) ion is in a square pyramidal environment.The two copper(Ⅱ) ions are linked by μ-oxamido bridge and the separation of them is 5.208A. The singlet-triplet energy gap J was found equal to -452.92cm~(-1), indicating that astrongantiferromagnetic spin-exchange interaction operates between the copper(Ⅱ) ions.     

草酰胺桥联异三核配合物Cu(NiL)2(ClO4)2的合成、光谱表征和晶体结构(英)

A novel oxamido-bridged trinuclear complex Cu(NiL)₂(ClO₄)₂(where H₂L=2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,3-dien) has been synthesized and characterized by elemental analysis, IR spectrum, UV-Visible spectrum and single crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P2₁/n. The lattice parameters are: a=1.052 4(6) nm, b=1.182 1(6) nm, c=1.586 2(9) nm, β=91.657(9)°, and V=1.972 6(19) nm³, Z=2. The results show that the coordination geometry around copper(Ⅱ) in the title complex is hexa-coordinated octahedron. CCDC: 232608.     

无机类分子性铁磁体的设计

分子性铁磁体的设计及合成是当今化学界的热点课题之一，无机类分子性铁磁体是一类重要的分子性铁磁体。本文论述这类分子性磁体的设计途径以及最新研究进展。     

N,N'-1,2-丙二水杨酰胺合铜(II)酸根的双核Cu(II)-Ni(II)配合物的合成和磁性

本文合成了两个新的双核配合物, [Cu(sampu)Ni(L)2], sampn^4^-表示N,N'-1,2-丙二水杨酰胺阴离子, L表示2,2-联吡啶(bpy)或1,10-菲咯啉(phen),经元素分析, IR和电子光谱等方法已推定配合物具有酚氧桥结构和Cu(II)及Ni(II)的配位环境分别为平面四方及八面体构型, 配合物的变温磁化率已测(4-300K), 其数值用最小二乘法和从自旋哈密顿算符H=-2JS1S2导出的磁方程拟合, 求得交换参数为J=-1.90cm^-^1(pby)和J=1.68cm^-^1(phen), 表明两个Cu(II)-Ni(II)双核配合物中有弱的反铁磁自旋交换相互作用。     

μ－邻苯二甲酸希土与5－硝基－1，10－菲咯啉双核配合物的合成、光谱、磁性

本文合成了四个以邻苯二甲酸阴离子为桥联配体的新型希土双核配合物［Ｌｎ２（Ｐｈｔｈ）（ＮＯ２－ｐｈｅｎ）４］（ＣｌＯ４）４·ｘＨ２Ｏ［Ｌｎ＝Ｇｄ、Ｔｂ、Ｈｏ、Ｅｒ，ＮＯ２－Ｐｈｅｎ＝５－硝基－１，１０－菲咯啉，Ｐｈｔｈ＝邻苯二甲酸阴离子）．经元素分析，ＩＲ、电导、电子吸收光谱，表征了配合物，测定了［Ｇｄ２（Ｐｈｔｈ）（ＮＯ２－ｐｈｅｎ）４］（ＣｌＯ４）４·４Ｈ２Ｏ的变温磁化率（４～３００Ｋ），其数值用最小二乘法与理论方程拟合，求得交换参数Ｊ＝－２．１８ｃｍ－１，表明Ｇｄ（Ⅲ）－Ｇｄ（Ⅲ）离子间存在较弱的反铁磁交换相互作用．     

N,N'-双(2-吡啶乙基)二硫代草酰胺根桥联的三核铜(Ⅱ)配合物的合成及性质

0引言多原子桥联配体的多核配合物中,顺磁离子间磁偶合作用的研究对阐明磁性和结构的关系以及设计新型分子基磁性材料具有重要的理论意义。草酸根及草酰胺根桥联的多核配合物得到了较为广泛和深入的研究[1~5]。硫原子取代两个氧原子后,形成二硫代草酸根及二硫代草酰胺根,由于硫     

From Dinuclear to Mononuclear：Co（Ⅱ） Complexes with Pyridine-2,6-Dicarboxylic Acid（H_2PDA）

Reactions of pyridine-2,6-dicarboxylic acid(H2PDA) with cobalt(Ⅱ) acetate resul-ted in two cobalt(Ⅱ) complexes,[Co(HPDA)2].2H2O.0.5CH3OH(1) and [Co2(PDA)2(H2O)5].2H2O(2),which were characterized by single-crystal X-ray diffraction,IR and electronic absorption spectra.For both complexes,every cobalt atom lies in peudo-octahedral coordination geometry,and the whole structures present 3D frameworks linked by π-π stacking interactions and extensive hydrogen bonds.Magnetic studies showed λ =-83.38 cm-1 for(1) and g = 2.50 and J =-1.38 cm-1 for(2).     

Synthesis, characterization and magnetism of μ-chloranilato bi-nuclear chromium (III) complexes

Five new chloranilato-bridged binuclear chromium (III) complexes have been synthesized and identified as [Cr2(CA)L4]-(ClO4)4[L denotes 5-methyl-1,10-phenanthroline (Me-phen); 2,9-dimethyl-1, 10-phenanthroline ( Me2-phen); 5-chloro-1,10-phenanthroline(Cl-phen); diaminoethane (en) or 1,3-diaminopropane (pn)], where CA represents the dianion of chloranilic acid. Based on elemental analyses, molar conductivity and magnetic moment of room-temperature measurements, and IR and electronic spectral studies, it is proposed that these complexes have CA-bridged structures and consist of two chromium (III) ions, each in an octahedral environment. The complexes [Cr2(CA)(Me-phen)4](ClO4)4(1) and [Cr2(CA)(Me2-phen)4](ClO4)4(2) were further characterized by variable temperature (4.2-300 K) magnetic susceptibility measurements and the observed data were successfully simulated by the equation based on the spin Hamiltonian operator, , giving the exchange parameter J = -7.8 cm-1 for (1) and J= -6.5 cm*1 for (2). This result     

具有非正规自旋态结构的新型Mn(Ⅱ)-Cu(Ⅱ)-Mn(Ⅱ)三核配合物的合成和磁性

合成和表征了四种新的异三核配合物,{[Mn(L)_2]_2[Cu(Pba)]}(ClO_4)_2,其中Pba表示为亚丙基-1,3-双(草胺酸根);L表示1,10-菲咯啉(phen)、5-硝基-1,10-菲咯琳(NO_2-phen)、2,2’-联吡啶(bpy)、4,4′-二甲基-2,2’-联吡啶(Me_2bpy).基于{[Mn(phen)_2]_2[Cu(pba)]}(ClO_4)_2·H_2O的变温磁化率测量(4.2～300K),求出交换积分J=-41.5cm(-1),表明Mn(Ⅱ)和Cu(Ⅱ)离子间为反铁磁耦合.在 X_MT-T图上,X_MT在175K附近呈现出一极小值,这是具有非正规自旋态结构的多金属耦合体系的典型特征.