含μ3-O三核混合铁铬醋酸配合物的骨架振动和简正坐标分析

在4000—100cm~(-1)波段范围内测定了含μ_3-O 三核混合铁铬醋酸配合物[FeCr_2(μ_3-O)(μ-O_2CCH_3)_6(H_2O)_3]·NO_3·xH_2O 和[Fe_2Cr(μ_3-O)-(μ-O_2CCH_3)_6(H_2O)_3·NO_3·xH_2O 的红外光谱.采用简化的普遍价力场对它们简化的骨架模型 FeCr_2O_(16)和 Fe_2CrO_(16)进行了简正坐标分析.振动基频的计算值与观测值符合良好,两者平均偏差均小于1.50%.计算结果支持了振动谱带的归属和精修的力常数的合理性.     

Study on the Reaction Behavior of Some Trinuclear Complexes of Transition Metals: [Fe_2M(μ_3-O) (μ-O_2CCH_3)_6(H_2O)_3]·xH_2O by the Method of Probe Reaction of Acetic Acid

INTRoDUCTIoNRecentlywehaveproposedamethodofchemicalprobereaction(l3forstudyingthereactionbehaviorsoftransitionmetalcomplexes.BythismethodtheserlalresultswereobtainedusingtheC,H, H,OandC2H2 H2astheprobereactions[1~53.Here-inisfurtherpresentedanotherkindoftheprobereaction--theacetoniaztionofaceticacidbydecarboxylationoverfourcomp1exeswithgeneralformula[Fe2M(p3-O)(p-O,CCH,),(H,O),j.xH,O,whereM=Fe(m),Mn(n),Co(I)andNi(n)'whichafterwardswillbedenotedas[Fe2M0AHjforsimplicity(N0te:inthe…     

[Mn3O(O2CC6H5)6(C3H4N2)3]·C6H5CO2·0.5H2O的 合成、晶体结构及磁性质

Mn(O2CMe)2·4H2O、咪唑、苯甲酸和N(n-Bu)4MnO4在无水乙醇溶剂中反应,制备得到锰的三核μ3-O桥联配位化合物[Mn3O(O2CC6H5)6(C3H4N2)3]·C6H5CO2·0.5H2O.该配位化合物的X射线单晶衍射表明,其属于单斜晶系,空间群P21/C,晶胞参数：a=1.52832(19)nm,b=1.9722(2)nm,c=2.1023(3)nm,β=92.597(3)°,Z=4.变温磁化率(5～280K)研究表明,该配位化合物中3个锰离子在低温下存在弱的反铁磁性耦合,交换积分J=-2.34cm^-1。     

若干镧系络合物的空间群

摘要 藉助模拟强度精修将九个镧系络合物晶体结构的空间群作了修正 .（ 1） NaN[Nd(DMSO)5(H2O)3]Cl3· 3H2O从 P1修正为 P;（ 2） Er(ClO4)3· 6(CH3)2NC(O)N(CH3)2从 P修正为 R;（ 3） Nd(O3SCF3)3· DMF· 6H2O从 P1修正为 R3m;(4)[NaNCCH3][Nd{S2CN(CH2CH3)2}4]从 P修正为 C 2/c;(5)[(CH3)2NCS2]3La· 2DMSO从 Cc修正为 C 2/c;（ 6） Yb(C9H7)2· 2THF从 Cc修正为 C 2/c;（ 7） [(C6H5)3Ge]2Yb· 4THF从 P21修正为 P 2;(8)TlPr(C36H44N4)2从 Pna2,修正为 Pnma;(9)[CuLaSm(C4O4)4(H2O)16]· 2H2O从 P2修正为 P2.（ 8）、（ 9）两个络合物结构从非心修正到有心时,不仅改进了键长与键角值,而且影响到分子结构特征的描述 .     

一类六核三价铁簇化合物的合成及结构表征（英文）

选择3种不同尺寸含氮配体(哌嗪、咪唑和三氮唑)与三羟甲基丙烷(H3tmp)和Fe Cl3采用溶剂热反应合成3例六核Fe髥合物:(C5H14N2)[Fe6(μ6-O)Cl6(tmp)4]·2H2O·CH3OH(1)、(C3H5N2)2[Fe6(μ6-O)Cl6(tmp)4](2)和(C4H8N3)3(C2H4N3)[Fe12(μ6-O)2Cl12(tmp)8]·3CH3OH(3),并对它们的结构进行表征。发现三元醇配体有利于合成高核金属簇。3个化合物具有相同的阴离子簇[Fe6(μ6-O)Cl6(tmp)4]2-。通过晶体学参数,元素分析,红外等手段证实,在化合物1和3的体系中,氮杂环配体经历了N-和C-烷基化反应。     

三重桥氧三核铁脂肪酸配合物FAB和EI质谱研究

本文报道三重桥氧三核铁脂肪酸配合物[Fe_3(μ_3～O)(μ-O_2CR)_6(H_2O)]_3~+(R=CH_3,C_2H_5,C_3H_7,C_4H_9,C_(15)H_(31)和C_(17)H_(35))的快原子轰击(FAB)和电子轰击(EI)质谱。在FAB—MS谱中观察到四种系列离子:Ⅰ.[Fe_3O(O_2CR)_n]~+n=2-6;Ⅱ.[Fe_3O(O_2CR)_nO]~+n=1-4;Ⅲ.[Fe_2O(O_2CR)_n]~+n=1-3;Ⅳ.[Fe_2(O_2CR)_n]~+n=2-4;以及与底物所形成的加合离子[Fe_3O(O_2CR)_n·NBA-1]~+n=3-5(NBA是间-硝基苄醇)。在EI—MS谱中,除上述Ⅰ—Ⅳ离子(其中n的数目略有差异)外,还观察到含三个配位水的完整阳离子[Fe_3(O_2CR)_6(H_2O)_3]~+及其与配体羧酸的加合离子[Fe_3O(0_2CR)_n(H_20)_3·RCOOH+H]~+n=4-6,(Fe_3O(O_2CR)_nO(H_2O)3·RCOOH+H]~+n=2—4和Fe(O_2CR)_n]~+n=1—3。分析了它们的断裂规律,探讨了从中所获得的有益启示。     

SYNTHESIS AND CRYSTAL STRUCTURE OF COMPLEX [CrMo_3 (μ_3-O)_3(μ-O)(μ-O_2CCH_3)_5(O_2CCH_3)_3]Na2 · H_2O

<正> The title complex C CrMo3 (μ3-O )3 (μ-O) (μ-O2CCH3 )5 (O2CCH3)3]2Na2 · H2O (Mr=1814. 32) crystallizes in monoclinic, space group P21/ n with a=11.209(5), b=18. 05(1), c=14. 44(1) A , β= 98. 30(5)°. V=2890 (3) A3, Z=2, A = 2. 08 g/cm3, F(000) -1780, Final R = 0. 049, Rw = 0. 058 for 2622 independent reflectons with I>3σ(I). The complex anion contains two Mo3O4 cores which connect two chromium atoms through four μ3-O atoms and eight bridging CH3COO- groups. Each of the Cr atoms and the Mo atoms is coordinated by six oxygen atoms. The anions are linked by Na cations to form one-dimensional infinite chain structure.     

STUDY ON OXO-CENTERED HETEROTRINULEAR TRANSITION METAL CARBOXYLATE COMPLEXES: Ⅱ. CRYSTAL STRUC TURES OF COMPOUNDS [Fe_2MnO(O_2CCH_3)_6Py]·Py AND [Fe_2CoO (O_2CCH_3)_6Py3]·Py

<正> The title compounds are isomorphous, they belong to trigonal space group R32, with crystallographic parameters: [Fe2MnO(O2CCH3)6Py3] ·Py: Mr = 853. 31, a = 17. 609(3), c=11. 056(3)(?), V = 2968. 9(?)3, Z = 3, Dc=1. 43 gcm-3, μ(MoKα) = 10. 9 cm-1, F (000) = 1317; [Fe2CoO(O2CCH3)6Py3]·Py: Mr = 857. 30, a = 17. 542(3), c=11. 049(2)(?), V = 2944. 8(?)3, Z = 3, Dc=1. 45 gem-3, μ (MoKα) = 12. 07 cm-1, F (000) = 1323. The structure of [Fe2MnO (O2CCH3)6Py3]·Py has been determined with the final R = 0. 042 for 663 reflections. The three crystallographically equivalent metal atoms form an equilateal triangle with side of 3. 324(?). The central oxygen aotm is on the three - fold axis with M - O distance 1. 919(?). The planar M3O core is normal to the three -fold axis and also to the solvate pyridine, which is dynamically disordered round this axis and is sandwiched by two Fe2MnO(O2CCH3)6Py3 molecules.     

Synthesis, Structure and Properties of a Copper Complex Cu2（μ-PhCOO）2（μ-CH3COO）2（CH3OH）2

1 INTRODUCTION Binuclear copper(II) carboxylate complexes have been studied extensively, and most of them are fami- liar binuclear molecule Cu2(RCOO)4L2 with four same bridges[1～5]. However, only a few copper(II) car- boxylate complexes with mixed bridges have been reported, i.e., they have common formulaCu2(R1C- OO)2(R2COO)2L2, such as Cu2(μ- C9H11O4)2(μ-CH3C- OO)2(H2O)2[6],Cu2(μ-PTMMC)2(μ-CH3COO)2(H2O)2[7, 8] and[Cu2(μ-O2CCH3)2(μ-O2CCF3)2(H2O)2]?2CH3CO2H[9…     

四吡唑取代的[Mn_8Ce]簇合物的合成、晶体结构与磁构关系研究

向Mn(O2CCH3)2·4H2O、吡唑和醋酸的乙腈/甲醇溶液中加入(NH4)2Ce(NO3)6得到1个四吡唑取代的[Mn8Ce]混金属簇合物[Mn8O8Ce(O2CCH3)12(pyr)4]·2CH3OH(2·2CH3OH,pyr为吡唑配体),并对其进行单晶结构分析、红外、元素分析和磁性研究。单晶结构研究表明,该化合物属于单斜晶系,P21/c空间群,8个Mn原子形成1个不在同一平面的八元环,然后通过8个μ3-O2-与位于环中心的1个CeⅣ连接起来。磁性研究表明,化合物中Mn3+离子之间是弱的铁磁性作用,基态自旋值S=6,交流磁化率虚部仅显示较微弱的频率依赖现象。通过研究系列[Mn8Ce]簇合物的磁构关系发现,配合物中随着含孤立μ3-O2-的∠MnOMn键角的增大和随着含桥连羧基O的∠MnOMn键角的减小,Mn3+间的铁磁性耦合增强,并进而导致化合物基态自旋值S的增大。     

多钒硼酸盐H3{[Cu（en）215[（VO）12O6B18O42]}[B（OH）3]2·16H2O的水热合成、晶体结构和性质

用H3BO3, NH4VO3, Cu(CH3COO)2·H2O和乙二胺在水热条件下合成了新颖结构的多钒硼酸盐H3{[Cu(en)2]5-[(VO)12O6B18O42]}[B(OH)3]2·16H2O,对其进行了单晶X射线衍射、红外光谱、拉曼光谱、紫外-可见漫反射光谱、荧光光谱、顺磁共振谱和热重分析表征.在该化合物的结构中,环状的B18O42通过18个B-(μ3-O)-V键被两个V6O18簇夹在中间,簇阴离子[(VO)12O6B18O42]13-分别通过4个[Cu(en)2]2+与邻近的簇阴离子靠静电相互作用连接成无限二维网状结构,其空洞尺寸为0.619～1.817 nm.     

两个典型氧桥三核铁髥配合物[Fe_3O(O_2CCH_2OC_6H_5)_6(3H_2O)]和[Fe_3O(TIEO)_2(O_2CPh)_2Cl_3]的局域自旋和磁性质的理论探讨(英文)

用从头算波函数(UHF或UDFT波函数)代替ZILSH方法中的半经验波函数得到了ABLSH方法,接着用该方法研究了两个典型氧桥三核铁髥配合物[Fe3O(O2CCH2OC6H5)6(3H2O)]和[Fe3O(TIEO)2(O2CPh)2Cl3]的局域自旋和磁性质。通过计算得到的局域自旋结果和前人的具有可比性,同时所得的磁交换耦合常数和实验值很吻合。该方法可作为研究海森堡型磁性系统(HM)的新工具。     

双帽羧桥三核钨(Ⅳ)原子簇化合物的结构研究

用新的合成途径,以Na_2WO_4·2H_2O为原料,Zn粉为还原剂,合成了三个簇合物(1)[W_3O_2(CH_3CO_2)_6(H_2O)_3]ZnBr_4·8H_2O,(2)H(W_3O_2(CH_3CO_2)_9]·5H_2O,(3)H_2Na_3[W_3O(CCH)_3(CH_3CO_2)_6(H_2)O][H_2W_(12)O_(40)]·13.5H_2O。在测定晶体结构和综合有关文献基础上,说明了反应过程,并进行了EHMO量化计算,探讨了该类型化合物的簇骼成键性质和相关的物理,化学性质。     

硝酸镝与丙氨酸配位反应的热化学研究

采用新型的具有恒温环境的反应热量计 ,以 2mol L的HCl作溶剂 ,分别测定了 [Dy(NO3) 3·6H2 O +4Ala]和Dy(Ala) 4(NO3) 3·H2 O在 2 5℃时的溶解焓。通过设计的热化学循环得到六水硝酸镝与丙氨酸配位反应的反应焓ΔrHmθ=30 .638kJ mol,并计算出配合物Dy(Ala) 4(NO3) 3·H2 O在 2 98.1 5K时的标准生成焓ΔfHmθ=-3833.8kJ mo     

Synthesis and Crystal Structure of an Ionic Compound [Fe(CN)_6(phCH_2NC_5H_5)3]·(H_2O)_4

A novel ionic compound [Fe(CN)6(phCH2NC5H5)3]·(H2O)4(Mr = 794.71) has been synthesized and its structure was characterized by IR, elemental analysis and X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 10.837(2), b = 16.551(3), c = 23.402(5) , β = 97.531(4)o, V = 4161.0(15) A3, Z = 4, Dc = 1.269 g/cm3, F(000) = 1668, μ = 0.414 mm-1, R = 0.0479 and wR = 0.1232. The building unit of the title compound consists of three (phCH2N+C5H5) ions, one [Fe(CN)6]3- anion and four water molecules. According to the structural analysis, [Fe(CN)6]3- are linked together by O–H···N and O–H···O hydrogen bonds, but [Fe(CN)6]3- and [(phCH2N+C5H5)3] ions are bound by electrostatic force to form an ionic compound.     

[NEt~4][Mn(salophen)(H~2O)~2]~2[Fe(CN)~6]·H~2O· CH~3OH超分子化合物的 合成和结构

室温下将[NEt~4]~3[Fe(CN)~6]和[Mn(salophen)(H~2O)(CH~3OH)]ClO~4反应,得到了超分子化合物[NEt~4][Mn(salophen)(H~2O)~2]~2[Fe(CN)~6]·H~2O·CH~3OH(salophenH~2=双水杨醛缩邻苯二胺),并对其进行了晶体结构测定。结果表明,该晶体属三斜晶系,空间群P1,晶胞参数a=1.2150(4)nm,b=1.4834(6)nm,c=1.6625(6)nm,α=81.896(7)°,β=76.980(8)°,γ=81.120(6)°,V=2.872(2)nm^3,Z=2,D~c=1.388g·cm^-^3。晶体的各部分间以氢键连接成网状超分子体系。     

三氯醋酸钕与8-羟基喹啉配合物的热化学研究

用溶解量热法 ,在自行研制的具有恒定温度环境的新型反应量热计中 ,测定了NdCl3·6H2 O(s)、CCl3COOH(s)和Nd(TCA) 3·3H2 O(s)在1mol/LHCl中的溶解焓。再根据盖斯定律设计了一个热化学循环 ,计算得到了六水合氯化钕与三氯醋酸反应的反应焓ΔrHmθ(2 98.15K) =2 0 1.688kJ/mol,并求出了Nd(TCA) 3·3H2 O(s)的标准生成焓ΔfHmθ[Nd(TCA) 3·3H2 O ,s ,2 98.15K ] =-3 0 5 3 .3kJ/mol。同时测定了Nd(TCA) 3·3H2 O(s) ,C9H7NO(s) ,Nd(TCA) (C9H6 NO) 2 (s)和CCl3COOH(s)在 4mol/LHCl、二甲亚砜和无水乙醇混合溶剂中的溶解焓 ,再根据盖斯定律设计了一个热化学循环 ,计算得到了三氯醋酸钕与 8 羟基喹啉反应的反应焓ΔrHmθ(2 98.15K) =-3 .2 2 6kJ/mol,并求出了Nd(TCA) (C9H6 NO) 2 (s)的标准生成焓ΔfHmθ[Nd(TCA) (C9H6 NO) 2 ,s ,2 98.15K] =-13 5 5 .6kJ/mol。     

Hydrothermal Synthesis and Structure of [CH_3NH_3]_2[(V~ⅣO)_2(V~ⅤO_4)_2]: A New Layered Mixed-valence Vanadium Oxide Incorporated with Organic Cations

IntroductionLayered intercalation compounds haveattracted increasing research attention due to theirapplications in diverse areas,for instance,some ofthem are used as rechargeable batteries,heterogeneous catalysts,and an exchange[1— 12 ] . Inprevious literatures,several layered mixed- valencevanadium oxides were reported,such as VO2 · 1 /2 H2 O[13 ] ,[H2 N( CH2 ) 4 NH2 ]V4O9[14 ] ,NH4V3 O8[15] ,( C6H14 · N2 ) V6O14 · 1 / 2 H2 O[16] ,[HN( C2 H4) 3 NH]V6O14 [17] ,NMe4V6O14 [18]…     

含铁杂多酸盐Mossbauer谱研究 IV: 钼磷铁杂多酸盐的合成和Mossbauer谱

合成了钼磷铁杂多黄(NH4)4[PFeMo11O40H2]·9H2O和杂多蓝(NH4)4[PFeMo11O40H3]·11H2O的铵盐晶体, 用^5^7Fe同位素增丰Mossbauer谱法, 结合磁化率测定, 研究其结构与性质, 并讨论了四极分裂值Q2和Keggin结构杂多阴离子中MO6(M=Mo, Fe)八面体畸变大小的关系, 进一步证实Keggin结构杂多蓝阴离子中Mo(V)-O-Fe(III)间存在反磁交换作用。     

含铁杂多酸盐Mossbauer谱研究 IV: 钼磷铁杂多酸盐的合成和Mossbauer谱

合成了钼磷铁杂多黄(NH4)4[PFeMo11O40H2]·9H2O和杂多蓝(NH4)4[PFeMo11O40H3]·11H2O的铵盐晶体, 用^5^7Fe同位素增丰Mossbauer谱法, 结合磁化率测定, 研究其结构与性质, 并讨论了四极分裂值Q2和Keggin结构杂多阴离子中MO6(M=Mo, Fe)八面体畸变大小的关系, 进一步证实Keggin结构杂多蓝阴离子中Mo(V)-O-Fe(III)间存在反磁交换作用。