Bis(ethylenedithio)tetrathiafulvalene bromide-ethylkne glycol: (BEDT-TTF)2Br·C2H4(OH)2. A new organic metal

A synthesis is reported for a new radical-cation salt (BEDT- TTF)₂Br·C₂H₄(OH)₂ having metallic electric conductance up to – 200 K. X-ray diffraction structural analysis was used to establish the existence of weak hydrogen bonds connecting the bromide ions with ethylene glycol molecules into infinite chains.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1438–1440, June, 1990.The authors thank R. B. Lyubovskii for measuring the electric conductance of a monocrystal of (I).     

Crystal structure of the organic conductor (BEDT-TTF)3Cl2·2H2O

Institute of Chemical Physics, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 5, pp. 3–7, September–October, 1990.     

配合物(n-Bu)2Sn(C10H8N2O4)(C2H5OH)的合成和晶体结构

以2-羰基丙酸水杨酰腙作为配体与二正丁基氧化锡(Ⅳ)在苯/乙醇混合溶剂中反应, 合成了新型配合物(n-Bu)2Sn(C10H8N2O4)(C2H5OH)(C10H8N2O42为2-羰基丙酸水杨酰腙负二价离子)。用单晶X-射线衍射分析法测定了该配合物的晶体结构。晶体属四方晶系, I41/a空间群, 晶胞参数a = 2.5113(7), b = 2.5113(7), c = 1.5062(6) nm, V = 9.499(5) nm3, Z = 16, Dc = 1.396 g/cm3, m(MoKa) = 1.105 mm1, F (000) = 4096。对于2499 (I >2s(I))个可观测点, 最终可靠因子R = 0.0349, wR = 0.0793。在该配合物的分子结构中, 中心锡原子与3个O原子、1个N原子和2个C原子形成扭曲的八面体几何构型, 其中3个O原子和1个N原子为赤道配位原子, 而CSnC为配合物的轴。相邻配合物分子间因Sn…O的弱相互作用和分子间氢键的作用而以二聚体的结构形式存在。     

α′-(BEDT-TTF)2C6H4(SO3)2的合成、结构与导电性

用恒电流电化学结晶法合成了一种新的基于BEDT-TTF的电荷转移盐α′-(BEDT-TTF)2C6H4(SO3)2[BEDT-TTF=双亚乙基二硫四硫富瓦烯,C6H4(SO3)2 2 -=对苯二磺酸根].通过四圆X射线衍射方法测定了α′@(BEDT-TTF)2C6H4-(SO3)2的结构.晶体属于单斜晶系,P2/n空间群;晶胞参数:α=0.77937(17)nm,b=0.66989(11)nm,c=3.4422(7)nm,β＝91.135(12)°,V=1.7968(6)nm3.该晶体中BEDT-TTF+自由基沿α轴方向形成具有二聚体结构的交错排列型柱状堆积,沿b轴方向由肩并肩强分子间相互作用形成一维分子链.电荷补偿阴离子C6H4(SO3)2 2 -则在α方向存在较强的作用.沿c轴方向,BEDT-TTF+自由基层和阴离子层交替排列形成夹心式结构.α′-(BEDT-TTF)2C6H4-(SO3)2在ab面的某方向的室温电导率为0.5913 Q-1@m-1,电阻率-温度测定曲线表明它具有半导体导电行为.在150K附近,晶体发生了某种相变.     

(BEDT-TTF)3Cu2(C2O4)3(CH3OH)2: an organic-inorganic hybrid antiferromagnetic semiconductor

An organic-inorganic hybrid combining a semiconducting BEDT-TTF layer and a Jahn-Teller distorted oxalato-bridged honeycomb antiferromagnetic layer [Cu(2)(C(2)O(4))(3)(2-)](n) was obtained and characterized.     

On the Crystal Structure of [Cu(OH)_2(H_2O)_2(4-C_5H_4NCOOH)_2]

In their report of the crystal structure of the compound claimed to be [Cu(OH)2(H2O)2(4- C5H4NCOOH)2], the authors did not give any experimental details on the location and refinement of the water and hydroxyl hydrogen atoms[1]; they had assumed the presence of the carboxylic -CO2H unit on the basis of the infrared stretching frequency at 1700 cm-1 that is only of medium intensity. The cell constants for the compound are, in fact, identical, with those documented for tetraaquabis(isonicot…     

The dimeric unit [La(H2O)4(m-PO3C6H4COOH)(m-PO2(OH)C6H4COOH)(m-PO(OH)2C6H4COOH)]2 as building block of layered hybrid material

A new hybrid organic–inorganic material with the structural formula unit [La(H₂O)₄(m-PO₃C₆H₄COOH)(m-PO₂(OH)C₆H₄COOH)(m-PO(OH)₂C₆H₄COOH)]₂ (or [La(H₂O)₄C₂₁H₁₈O₁₅P₃]₂) has been synthesized under hydrothermal condition from La(NO₃)₃·6H₂O and 3-phosphonobenzoic acid (m-PO(OH)₂–C₆H₄–COOH) which is a rigid organic precursor possessing two types of functional groups: phosphonic acid and carboxylic acid. The two units of the produced hybrid are linked together by hydrogen bonds leading to a layered framework composing of by a repetition of inorganic and organic slices. The organic layers consist of dimeric units made of two meta-phosphono-benzoic acid linked together by hydrogen bonds involving their COOH groups. Two kinds of dimeric units are observed: PO₃C₆H₄COOH?HOOCC₆H₄PO(OH)₂, present 2 times in the structure, and PO₂(OH)C6H4COOH?HOOCC₆H₄PO₂(OH). The material crystallises in a monoclinic cell (C2/c (15) space group) with the following parameters: a = 42.515(4) Å, b = 7.4378(6) Å, c = 20.307(2) Å, β = 118.031(6)°, V = 5668.2(9) Å³, Z = 4, density = 1.908 g/cm³.     

[CdCl2(C2H4(OH)2)]3 · C2H4(OH)2 — ein neuer Typ von Ethandiol-1,2-Koordinationsverbindungen

[CdCl₂(C₂H₄(OH)₂)]₃ · C₂H₄(OH)₂ — a New Type of Ethanediol-1,2 Coordination Compounds The coordination compound crystallizes with triclinic symmetry in space group P1 ; a = 10.418(2), b = 10.739(2), c = 11.053(2) Å, α = 86.04(2), β = 67.68(1), γ = 88.23(2)°; Z = 2, d_calc. = 2.32 g/cm³, R(F) = 0.031. The structure consists of Cd(C₂H₆O₂)Cl_4/2 octahedra with two edges (Cl double bridges) in common which form endless chains along [11 1]. A new orientational sequence of the unique ligand C₂H₆O₂ in the chain is found. The C₂H₆O₂ solvent molecule is located between the chains. Hydroxyl groups are involved in different H bridging systems which cause for all C₂H₆O₂ molecules a different conformation. This is confirmed by the results of IR and Raman spectra.     

一维链状高价锰配合物[Mn_2(C_7H_4O_3)_4(CH_3OH)_2]·4H_2O_2CH_3OH的合成与结构

合成了一维链状高价锰配合物[Mn2(C7H4O3)4(CH3OH)2]4H2O2CH3OH,并对其进行了IR、X-射线衍射、UV-Vis和TG-DSC等表征。单晶衍射结果表明,该配合物晶体属三斜晶型,空间群P?晶胞参数a=7.653(5),b=10.486(7),c=12.943(8),=103.24(1),?=104.55(1),?=110.11(1),V=885.4(9)3,Z=1。UV-Vis光谱在547nm有一个吸收峰,相应于Mn(Ⅳ)的d-d电子跃迁光谱。     

[C5H4C(CH3)2CH2CH=CH2]Sm(OH)Cl·2MgCl2·4THF的晶体结构分析

用Ｘ－射线晶体结构衍射法测定了［Ｃ５Ｈ４Ｃ（ＣＨ３）２ＣＨ２ＣＨ＝ＣＨ２］Ｓｍ（ＯＨ）Ｃｌ·２ＭｇＣｌ２·４ＴＨＦ的晶体结构。它属三斜晶系,空间群为Ｐ＾－１,ａ＝１０．７７３（２）,ｂ＝１２．８３６（３）,ｃ＝１５．４７８（３）Ａ,ａ＝１１１．４６（３）,β＝１０７．７１（３）,γ＝９２．５４（３）°,Ｖ＝１８６８（１）Ａ＾３,Ｍｒ＝８２７．９１,Ｄｘ＝１．４７２ｇ／ｃｍ＾３,μ＝２．０００６ｍｍ     

Semiconducting perovskites (2-XC6H4C2H4NH3)2SnI4 (X = F,Cl, Br): steric interaction between the organic and inorganic layers

Two new semiconducting hybrid perovskites based on 2-substituted phenethylammonium cations, (2-XC(6)H(4)C(2)H(4)NH(3))(2)SnI(4) (X = Br, Cl), are characterized and compared with the previously reported X = F compound, with a focus on the steric interaction between the organic and inorganic components. The crystal structure of (2-ClC(6)H(4)C(2)H(4)NH(3))(2)SnI(4) is solved in a disordered subcell [C2/m, a = 33.781(7) A, b = 6.178(1) A, c = 6.190(1) A, beta = 90.42(3)(o), and Z = 2]. The structure is similar to the known (2-FC(6)H(4)C(2)H(4)NH(3))(2)SnI(4) structure with regard to both the conformation of the organic cations and the bonding features of the inorganic sheet. The (2-BrC(6)H(4)C(2)H(4)NH(3))(2)SnI(4) system adopts a fully ordered monoclinic cell [P2(1)/c, a = 18.540(2) A, b = 8.3443(7) A, c = 8.7795(7) A, beta = 93.039(1)(o), and Z = 2]. The organic cation adopts the anti conformation, instead of the gauche conformation observed in the X = F and Cl compounds, apparently because of the need to accommodate the additional volume of the bromo group. The steric effect of the bromo group also impacts the perovskite sheet, causing notable distortions, such as a compressed Sn-I-Sn bond angle (148.7(o), as compared with the average values of 153.3 and 154.8(o) for the fluoro and chloro compounds, respectively). The optical absorption features a substantial blue shift (lowest exciton peak: 557 nm, 2.23 eV) relative to the spectra of the fluoro and chloro compounds (588 and 586 nm, respectively). Also presented are transport properties for thin-film field-effect transistors (TFTs) based on spin-coated films of the two hybrid semiconductors.     

Raman spectroscopic study of the uranyl minerals vanmeersscheite U(OH)4[(UO2)3(PO4)2(OH)2].4H2O and arsenouranylite Ca(UO2)[(UO2)3(AsO4)2(OH)2].(OH)2.6H2O

Raman and infrared spectra of secondary uranyl phosphate vanmeersscheite and Raman spectrum of secondary uranyl arsenate arsenuranylite were recorded and interpreted, and the spectra related to the structure of the minerals. Observed bands were attributed to the stretching and bending vibrations of uranyl, phosphate and/or arsenate units and OH (H(2)O and OH(-)) units. Phosphuranylite sheet topology is characteristic for both minerals. U-O bond lengths in uranyl were calculated from the spectra and compared with those inferred for vanmeersscheite from the X-ray single crystal structure analysis. O-H...O hydrogen bonds in both minerals were also inferred using the Libowitzky empirical relation.