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1 INTRODUCTION During the last decade the manganese che- mistry has aroused great interest due to its diverse redox functions of enzymes in photosystem Ⅱ and its specially structural, magnetic and spectroscopic properties[1, 2]. A lot of manganese complexes involving carboxylate ligands have been reported, and their properties been fully explored[3, 4]. The coordination environment of the manganese site in biosystem often consists of oxygen and nitrogen atoms from the carboxylate groups… 相似文献
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在 (NH4) 2 MoS4,FeCl2 ,NaSC6 H1 1 (C6 H1 1 为环己基 )的甲醇反应体系中得到一种新型的 [Me3PhCH2 N] 2 [MoFe4S4(SC6 H1 1 ) 7]的钼铁硫立方烷原子簇 ,并进行了结构表征 .它的晶体属三斜晶系 ,空间群P 1,a =1.5 2 3 1( 3 )nm ,b =1.610 5 ( 3 )nm ,c=1.83 83 ( 4 )nm ,α =77.18( 3 )° ,β =75 .17( 3 )° ,γ =64 .60 ( 3 )° ,Z =2 .讨论了由于环烷巯基参与而引起的反应产物及其结构变化 相似文献
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Cu(sahm)_2·4H_2O的合成及晶体结构 总被引:4,自引:1,他引:4
标题化合物Cu(sahm)_2·4H_2O,C_(22)H_(30)N_8O_(10),M_r=629.5(sahm=4-(邻羟基苯基亚甲基)-亚胺-3.5-二羟甲基-1,2,4-三唑)被合成并得到单晶。X-衍射结构分析表明,晶体属单斜晶系,空间群P2_1/c,晶体学数据:a=8.3189(8)A,b=9.827(1)A,c=16.126(2)A,β=102.585(9)°,V=1286.6(3)A~3,Z=2,D_x=1.48g/cm~3,μ=0.907mm(-1),F(000)=598。最终偏离因子R=0.042,R_w=0.057。结构分析表明,分子中两个偶氮甲碱的N原子及两个酚氧原子与中心Cu原子配位,形成规则的菱形平面结构。 相似文献
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C6H11Na, Et4NBF4, FeCl2, (NH4)2WS4在20mL CH3OH溶剂的反应中, 标题簇合物(Et4N)3[W2Fe6S8(SC6H11)6(OCH3)3]被分离得到, 对其进行X-ray 单晶衍射和结构解析。 该化合物属正交晶系,空间群 Pmmn, 晶胞参数 a = 17.370(5), b = 15.986(4), c = 17.858(3), V = 4958.6(6)3, Z = 2,C63H135N3O3S14Fe6W2, Mr = 2134.47, Dc = 1.43g/cm3, F(000) = 2172.0, m(MoKa) = 3.49 mm-1, T = 293(2)K。 采用2966个I > 2.0s (I) 的衍射点对所有非氢原子参数进行结构修正。 得到最后的偏离因子为R = 0.072, Rw = 0.091。 这是一个双类立方烷的结构, 2个单类立方烷的端基金属钨原子通过3个甲氧基桥联。 [WFe3S4] 与 [MoFe3S4]簇核结构比较说明, 两者存在一定的相似性。 相似文献
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标题化合物(Et_4N)_2[Fe_2S_2Br_4](1)在VS_4~(3-)/FeBr_2/imnt~(2-)/Et_4NCI的反应体系中获得,它属于单斜晶系,空间群P2_1/n,主要晶胞参数为:α=0.91193(2)nm,b=1.03874(3)nm,c=1.54360(1)nm,β=105.090(1)°,V=1.41177(5)nm~3,Z=2, ρ=1.778g/cm~3,μ=6.841cm~(-1),F(000)=748,结构精修结果为:R_1=0.0287,wR_2=0.0640.簇阴离子[Fe_2S_2Br_4]~(2-)含有一个菱形Fe_2S_2单元,铁的配位几何构型明显偏离了理想的T_d对称性,导致整个阴离子的对称性降低为D_(2h).同时观察到它的Fe-Br键呈现反常加长倾向. 相似文献
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A trinuclear linear Mo-Fe-Mo dialkyldithiocarbamate complex [Et4N] { [ Me2dtcMoO (μ-S)2 ]2Fe} has been obtained and structurally characterized, which contains two Me2dtcMoO-(μ-S)2 units coordinated to a central tetrahedral Fe atom. A comparison of the structural parameters indicates the metal oxidation states of 2Mo(v) Fe(III). The 1H NMR shows chemical shifts of Me2dtc ligands at 5 10.14 and 8 9.40 with the intensity ratio of 1:1. The cyclic voltammogram displays a reversible couple at - 1.41 V/ - 1.36 V responsible for 1-/2-anions of the complex and an irreversible oxidation at 0.5 V, which seems to show the apparent lack of stability for its neutral species (Me2dtcMoOS2)2Fe. 相似文献
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在水杨醛与二元胺形成的Schiff碱与Mn盐的反应体系中分离出两个单核Mn化合 物,(salen)Mn(H_2O)Cl(1)和[(salpr)Mn(H_2O)_2]Cl(2),并测定了结构。应用对 苯二甲酸在碱性条件下拉接两个单核Mn的Schiff碱配位单元,生成(salen)_2Mn_2 [μ-p-C_6H_4(COO)_2](H_2O)(CH_3OH)(3)并进行了结构表征。讨论了这些化合物 的红外及~1HNMR谱,揭示了Mn中心对配体信号的影响。 相似文献
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1 INTRODUCTION Polymeric manganese complexes with fascinating topological chemistry have received considerable interest[1, 2]. The complexation of phen with man- ganese ion gives rise to a wide variety of coordi- nation complexes; however, (phen)Mn coordina- tion polymers are rare since the chelation of phen results in 1 to 3 5-membered chelating rings, ob- structing the way towards the coordination poly- mer. Similar situation has also been observed for 2,2?-bipyridine (bpy) which has si… 相似文献
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