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0IntroductionInthepastfewyears,themolecular-basedmag-neticpropertiesofheteronuclearcomplexessimultane-ouslycomprisinglanthanideandtransitionmetalionshaveattractedincreasinginterest犤1~6犦.Inourlaborato-ry,wehavesynthesizedsuchtypeofcomplexeswithdifferentcarboxylicbridgingligands犤7~10犦.Asanex-tensionofthisresearcharea,ourpresentworkaimstosynthesizenovelcomplexesofrareearthandtransi-tionmetalbyusingoroticacidasabridgingligand.Inthecourseofourinvestigationtwonewcomp-lexesof犤Cu(C5H2N2O4)(H… 相似文献
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A new lanthanumⅢ-ironⅢ complex [La(DMSO)5(H2O)](μ-CN)2[Fe(CN)4]·H2O 1 (DMSO=dimethylsulfoxide) has been prepared by a facile approach,ball-milling method,and characterized by X-ray diffraction. The crystal belongs to monoclinic,space group P21/n with a= 9.7125(3),b=21.5336(7),c=14.3804(5),β=93.242(3)o,C16H34FeLaN6O7S5,Mr=777.55,V =3002.8(2)3,Z=4,Dc=1.720 g/cm3,S=1.053,μ(MoKα)=2.278 mm–1,F(000)=1564,R= 0.0490 and wR=0.1270. The crystal structure analysis of 1 reveals a slightly distorted square-antiprism eightfold-coordinated La(Ⅲ) ion and a 1-D zigzag chain structure extending through the Fe-CN-La-NC-Fe linkages. The [La(DMSO)5(H2O)](μ-CN)2[Fe(CN)4] species are held together via hydrogen bonds to form a three-dimensional framework. 相似文献
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钼铁混合金属原子簇Mo_2Fe_2Te_2(CO)_7(η~5-C_5H_5)_2是Fe_3Te_2(CO)_9与Mo_2(CO)_6(η~5~C_5H_5)_2反应所得的产物之一。它的晶体属正交晶系,空间群为Pbn2_1。晶胞参数:a=12.172(5);b=13.595(2);c=12.924(4)A,V=2138.5(2)A~3。晶体结构由直接法及差值Fourier合成解出,经最小二乘法修正,最终R因子为0.030(3233个Ⅰ>26(Ⅰ)的反射)。在簇分子中,四个金属原子呈四面体构型,两个μ_8-Te原子和一个不对称的μ_8-CO分别桥连到四面体的三个三角面的金属原子上,从而构成了缺顶点的类立方烷结构。 相似文献
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A dinuclear complex [DyFe(CN)6(DMF)4(H2O)3]·1.25H2O(DMF=N, N-dimethylformamide) 1 based on the cyanide as linkage was prepared and structurally characterized by X-ray single-crystal structure analysis. The Dy(Ⅲ) ion is eight coordinations in a square-antiprism arrangement and the Fe(Ⅲ) ion is six coordinations oriented octahedrally. The neutral units [DyFe(CN)6(DMF)4(H2O)3] are held together by hydrogen bonds formed by lattice water molecules, coordinated water molecules and nitrogen atoms of cyanide coming from other distinct complex units to afford a three-dimensional framework. CCDC: 192314. 相似文献
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比较了含有配位不饱和过渡金属原子簇合物Mo_2S_4(dtp)_2,(Ⅰ)和Mo_3S_4(dtp)_4·Py,(Ⅱ)的紫外—可见电子吸收光谱实验数据和半经验的量子化学方法INDO计算得到的电子跃迁能,讨论了(d-p)π型共轭作用对其电子吸收光谱位移的影响。结果表明,过渡金属簇合物中电子吸收光谱位移,与有机共轭体系有着类似的变化规律,即随着共轭π键数目增加,π-π电子跃迁的吸收光谱红移。 相似文献
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Under hydrothermal conditions the reaction of cis-aconitic acid with Cu2(OH)2CO3 and bipy (bipy = 2,2'-bipy) in H2O/DMF (3:2) afforded a neutral mononuclear compound [Cu- (bipy)((2-CO3)(H2O)](2H2O, which has been structurally characterized by single-crystal X-ray diffraction analysis. The crystal belongs to triclinic, space group Pī with a = 8.3950(5), b = 8.7974(5), c = 9.4496(3)(A。), α = 98.270(3), β = 93.014(3), γ = 100.068(3)°, V = 677.83(6) (A。)3, Dc = 1.635 g/cm3, Z = 2, C11H14CuN2O6, Mr = 333.78, μ = 1.637 mm-1, λ(MoKα) = 0.71073 (A。), F(000) = 342, the final R = 0.0616 and wR = 0.1273 for 1621 observed reflections with I > 2σ(I). The structure of the complex contains a distorted square pyramidal core with a bipy, a carbonate anion and a water molecule coordinating to a CuⅡ atom. The dihedral angle between the two planes composed of N(1)N(2)Cu(1) and O(1)O(3)Cu(1) is 21.73(8)°. The intermolecular hydrogen bonds (O…O) are observed in the crystal structure. 相似文献
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1 INTRODUCTIONInthepastfew years ,anincreasinginteresthasbeen giventothemagnetic propertiesofmolecularcomplexescomprisingsimultaneouslylanthanideandtransitionmetalionswiththeaimofclarifyingtheroleoftheexchangeinteractionsbetween 3dand 4fmetalionsmodifying… 相似文献