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1.
Molecular Oxygen Modulated Luminescence of an Octahedro‐hexamolybdenum Iodide Cluster having Six Apical Thiocyanate Ligands
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Lara Riehl Markus Ströbele David Enseling Thomas Jüstel H.‐Jürgen Meyer 《无机化学与普通化学杂志》2016,642(5):403-408
The synthesis, characterization, and luminescence properties of (Bu4N)2[Mo6I8(NCS)6] are reported. Orange crystals of (Bu4N)2[Mo6I8(NCS)6] were crystallized from acetone solution and used for X‐ray single‐crystal structure determination and refinement, yielding a structure with a centrosymmetric [Mo6I8(NCS)6]2– ion. Photoluminescence studies on the crystalline solid revealed a broad excitation in the UV/Vis region and an emission around 690 nm. The red emission intensity decreases with increasing partial pressure of atmospheric molecular O2. 相似文献
2.
Aixiang Tian Xiaojing Liu Guiying Liu Jun Ying Prof. Dr. Xiuli Wang 《无机化学与普通化学杂志》2012,638(1):141-145
Through utilizing the flexible bis(triazole) ligand 1, 6‐bis(1, 2, 4‐triazol‐1‐yl)hexane (btx), a new octamolybdate‐based compound, [Cu2(btx)4(β‐Mo8O26)] · H2O ( 1 ), was synthesized under hydrothermal conditions. It was characterized by single‐crystal X‐ray diffraction, elemental analyses, IR spectroscopy, thermogravimetric analysis, and cyclic voltammetry. In compound 1 , the [β‐Mo8O26]4– anion acts as a bi‐connected inorganic linkage to connect the Cu‐btx moieties. The Cu1‐btx moiety linked by the [β‐Mo8O26]4– anions exhibits a 2D layer, while the Cu2‐btx moiety also shows a similar 2D layer. Furthermore, these two 2D moieties construct a 3D framework through sharing the same N7‐containing btx ligands. 相似文献
3.
Alina D. Mironova Maxim A. Mikhajlov Taisiya S. Sukhikh Konstantin A. Brylev Artem L. Gushchin Ilia V. Eltsov Dmitri V. Stass Evgeny I. Goryunov Valery K. Brel Maxim N. Sokolov 《无机化学与普通化学杂志》2019,645(18-19):1135-1140
Reaction of [Mo6I8(CH3COO)6]2– with bis(pentafluorophenyl)phosphinic acid HO(O)P(C6F5)2 yielded a new bright‐red luminescent complex [{Mo6I8}(O2P(C6F5)2)6]2–, isolated as (Bu4N)(H5O2)[{Mo6I8}(O2P(C6F5)2)6] · 3(Et2O) · 1.5(acetone). It was characterized by X‐ray analysis, CV, ESI‐mass spectrometry, and NMR spectroscopy. 相似文献
4.
Reinhard Felsberg Steffen Blaurock Peter C. Junk Reinhard Kirmse Andreas Voigt Evamarie Hey‐Hawkins 《无机化学与普通化学杂志》2004,630(6):806-816
[Cp°MoCl4] (Cp° = C5EtMe4) reacts with primary phosphines PH2R to give the paramagnetic phosphine complexes [Cp°MoCl4(PH2R)] [Cp° = C5EtMe4, R = But ( 1 ), 1‐Ad (1‐Ad = 1‐adamantyl; 2 ), Cy ( 3 ), Ph ( 4 ), Mes (Mes = 2, 4, 6‐Me3C6H2; 5 ), Tipp (Tipp = 2, 4, 6‐Pri3C6H2; 6 )]. 1 — 6 were characterized spectroscopically (IR, MS), and X‐ray crystal structures were determined for 1 — 4 and 6 . EPR investigations in liquid and frozen solution confirmed the presence of MoV species, and the data were used to analyze the spin‐density distribution in the first coordination sphere. Complexes 3 and 4 react with two equivalents of NEt3 with formation of [Cp°MoCl2(η3‐P4Cy4H)] ( 7 ) and [Cp°2Mo2(μ‐Cl)2(μ‐P4Ph4)] ( 8 ), respectively, in low yield. Complexes 7 and 8 were characterized by X‐ray crystallography. 相似文献
5.
Guo‐Cheng Liu Yu‐Fei Wang Ai‐Xiang Tian Xiu‐Li Wang Jing‐Jing Cao Song Yang Hong‐Yan Lin 《无机化学与普通化学杂志》2013,639(1):148-157
Three new 2D/3D supramolecular architectures derived from Cu‐organic subunits and Keggin anions, [CuII2(biz)8(HPMoVI10MoV2O40)(H2O)2] · 2H2O ( 1 ), [CuI4(biz)8(SiW12O40)] · 2H2O ( 2 ) and [CuI2(dmbiz)4(Hdmbiz)2(SiW12O40)] ( 3 ) (biz = benzimidazole, dmbiz = 5, 6‐dimethyl benzimidazole), were obtained under hydrothermal conditions. Single crystal X‐ray diffraction analysis reveals that compound 1 has two kinds of [CuII(biz)2]2+ cations, which are further extended by Keggin anions into a 2D (4, 8)‐connected supramolecular network by hydrogen bonding interactions. In compound 2 , four types of [CuI(biz)2]+ subunits link the [SiW12O40]4– anions to form a 3D (2, 6)‐connected supramolecular structure. Compound 3 shows a 3D supramolecular network with a NaCl‐type topology constructed by [CuI(dmbiz)2]+ subunits, anions, and discrete [Hdmbiz]+ cations. Moreover, the electrochemical and photocatalytic properties of compounds 1 and 2 were investigated. 相似文献
6.
A novel antimony substituted polyoxomolybdate has been synthesized and characterized by X‐ray structure analysis, energy dispersive X‐ray fluorescence analysis, Raman and IR spectroscopy. The [Sb4Mo12(OH)6O48]10‐ anion exhibits a central Sb4(OH)6O14 core where all SbV atoms are coordinated octahedrally by six oxygen atoms. It represents a novel type of heteropolyanion with no known analogous structure in literature. 相似文献
7.
[Mo2(O2C–CH3)4 · 1/2 {(CH2)6N4} · 1/2 CH2Cl2] – a Donor‐Acceptor Complex with Supramolecular Structure Yellow single crystals of [Mo2(O2C–CH3)4 · 1/2 {(CH2)6N4} · 1/2 CH2Cl2] ( 1 ) have been obtained by the reaction of the silylated phosphaneimine Me3SiNPEt3 with [Mo2(O2C–CH3)4] in dichloromethane solution. 1 forms a three‐dimensional network with linear N–Mo:Mo–N and tetrahedral (CH2)6N4Mo4 moieties, which is topologically related with the PtS type. Space group P42/nnm, Z = 4, lattice dimensions at –70 °C: a = b = 1121.7(1), c = 1395.0(3) pm, R1 = 0.0413. 相似文献
8.
A Rare Tetranuclear Thorium(IV) μ4‐Oxo Cluster and Dinuclear Thorium(IV) Complex Assembled by Carbon–Oxygen Bond Activation of 1,2‐Dimethoxyethane (DME)
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Dr. Nicholas E. Travia Dr. Brian L. Scott Dr. Jaqueline L. Kiplinger 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(51):16846-16852
The synthesis and X‐ray crystal structure of two new multinuclear thorium complexes are reported. The tetranuclear μ4‐oxo cluster complex Th4(μ4‐O)(μ‐Cl)2I6[κ2(O,O’)‐μ‐O(CH2)2OCH3]6 and the dinuclear complex Th2I5[κ2(O,O’)‐μ‐O(CH2)2OCH3]3(DME) (DME=dimethoxyethane) are formed by C?O bond activation of 1,2‐dimethoxyethane (DME) mediated by thorium iodide complexes. 相似文献
9.
A novel mixed‐tribridged dimolybdenum(I) compound [Bn4N][Mo2(μ‐SPh)2(μ‐Cl)(CO)6] (1) has been synthesized from the reaction of Mo2(CO)3(SPh)2 with BU4NCl. Compound 1 was characterized by IR, UV‐Vis and 1H, 13C, 95Mo NMR spectroscopic analyses. The electrochemical behavior was measured by cyclic voltammetry, indicating a quasi‐reversible two‐electron transfer in one step. The crystal structure determined by X‐ray crystallography shows that 1 contains a [Mo2(μ‐S)2(μ‐Cl)]? core with a planar Mo2S2unit and a Cl bridge. The Mo? Mo distance is 0.28709(7) nm, and the Mo‐Cl‐Mo angle is 66.44(4)°. A newface‐sharing bioctahedral structure is discussed. 相似文献
10.
[Fe2(μsb‐CO)(CO)3(NO)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)]: Synthesis, X‐ray Crystal Structure and Isomerization Na[Fe2(μ‐CO)(CO)6(μ‐PtBu2)] ( 1 ) reacts with [NO][BF4] at —60 °C in THF to the nitrosyl complex [Fe2(CO)6(NO)(μ‐PtBu2)] ( 2 ). The subsequent reaction of 2 with phosphanes (L) under mild conditions affords the complexes [Fe2(CO)5(NO)L(μ‐PtBu2)], L = PPh3, ( 3a ); η‐dppm (dppm = Ph2PCH2PPh2), ( 3b ). In this case the phosphane substitutes one carbonyl ligand at the iron tetracarbonyl fragment in 2 , which was confirmed by the X‐ray crystal structure analysis of 3a . In solution 3b loses one CO ligand very easily to give dppm as bridging ligand on the Fe‐Fe bond. The thus formed compound [Fe2(CO)4(NO)(μ‐PtBu2)(μ‐dppm)] ( 4 ) occurs in solution in different solvents and over a wide temperature range as a mixture of the two isomers [Fe2(μsb‐CO)(CO)3(NO)(μ‐PtBu2)(μ‐dppm)] ( 4a ) and [Fe2(CO)4(μ‐NO)(μ‐PtBu2)(μ‐dppm)] ( 4b ). 4a was unambiguously characterized by single‐crystal X‐ray structure analysis while 4b was confirmed both by NMR investigations in solution as well as by means of DFT calculations. Furthermore, the spontaneous reaction of [Fe2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 5 ) with NO at —60 °C in toluene yields a complicated mixture of products containing [Fe2(μ‐CO)(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 6 ) as main product beside the isomers 4a and 4b occuring in very low yields. 相似文献
11.
Arin-Daniel Fuhrmann Florian Pachel Markus Ströbele David Enseling Thomas Jüstel Hans-Jürgen Meyer 《无机化学与普通化学杂志》2020,646(19):1650-1654
Molybdenum and tungsten iodide clusters with the [M6I8] cluster core show versatile photophysical properties that strongly depend on the nature of six apical ligands (L) in [M6I8L6]2–. In course of our syntheses we report a new efficient preparation of Cs2[Mo6I14] as precursor. Target compounds (nBu4N)2[M6I8(NCO)6] with M = Mo, W with cyanate ligands were synthesized and structurally characterized to study their photophysical properties. (nBu4N)2[M6I8(NCO)6] compounds appear as deep red (Mo) and light yellow (W) crystal powders showing strong phosphorescence. Compared to other cluster compounds of this type there is no significant concentration quenching obtained by the presence of molecular oxygen. 相似文献
12.
A diiron hexacarbonyl complex containing bridging phenanthrene‐4,5‐dithiolate ligand is prepared by oxidative addition of Phenanthro[4,5‐cde][1,2]dithiin to Fe2(CO)9. The complex is investigated as a model for the active site of the [Fe–Fe] hydrogenase enzyme. The compound, [(μ‐PNT)Fe2(CO)6]; (PNT = phenanthrene‐4,5‐dithiolate), was characterized by spectroscopic methods (IR, UV/Vis and NMR) and X‐ray crystallography. The IR and proton NMR spectra of [(μ‐PNT)Fe2(CO)6] ( 4 ) are in agreement with a PNT ligand attached to a Fe2(CO)6 core. The infrared spectrum of 4 recorded in dichloromethane contains three peaks at 2001, 2040, and 2075 cm–1 corresponding to the stretching frequency of terminal metal carbonyls. X‐ray crystallographic study unequivocally confirms the structure of the complex having a butterfly shape with an Fe–Fe bond length of 2.5365 Å close to that of the enzyme (2.6 Å). Electrochemical properties of [(μ‐PNT)Fe2(CO)6] have been investigated by cyclic voltammetry. The cyclic voltammogram of [(μ‐PNT)Fe2(CO)6] recorded in acetonitrile contains one quasi‐irreversible reduction (E1/2 = –0.84 V vs. Ag/AgCl, Ipc/Ipa = 0.6, ΔEp = 131 V at 0.1 V · s–1) and one irreversible oxidation (Epa = 0.86 V vs. Ag/AgCl). The redox of [(μ‐PNT)Fe2(CO)6] at E1/2 = –0.84 V can be assigned to the one‐electron transfer processes; [FeI–FeI] → [FeI–Fe0] and [FeI–Fe0] → [FeI–FeI]. 相似文献
13.
Organic‐Inorganic Hybrid Supramolecular Assemblies Based on Isomers [HxAs2Mo6O26](6–x)– Clusters
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The arsenomolybdates [H2As2Mo6O26(H2O)] · (H2biyb)2 · 2H2O ( 1 ) and [H3As2Mo6O26] · (H3pt)2 ( 2 ) [biyb = 1,4‐bis(imidazol‐1‐ylmethyl)benzene, pt = 4′‐(3′′‐pyridyl)‐2,3′:6′3′′‐terpyridine] were synthesized via hydrothermal method. The structures of the compounds were characterized by single‐crystal X‐ray diffraction analyses, elemental analyses, IR spectroscopy, and TG analysis. Compounds 1 and 2 exhibit two isomeric forms of [HxAs2Mo6O26](6–x)–. The structure of 1 is constructed from the B‐type [H2As2Mo6O26(H2O)]4– polyanions and free biyb ligands via weak interactions to form 3D supramolecular framework with a {3 · 4 · 53 · 6}{3 · 43 · 52}{3 · 5 · 6}2{3 · 52}2 topology structure. In compound 2 , the A‐type [H3As2Mo6O26]3– clusters are surrounded by pt ligands through hydrogen bond interactions forming 3D supramolecular framework with a {43 · 63}2{46 · 66 · 83} topology structure. The electrochemical behaviors, electrocatalytic and photocatalytic activities of 1 and 2 are detected. 相似文献
14.
Dudekula Sharmila Bijan Mondal Rongala Ramalakshmi Sangita Kundu Dr. Babu Varghese Prof. Sundargopal Ghosh 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(13):5074-5083
A combined experimental and quantum chemical study of Group 7 borane, trimetallic triply bridged borylene and boride complexes has been undertaken. Treatment of [{Cp*CoCl}2] (Cp*=1,2,3,4,5‐pentamethylcyclopentadienyl) with LiBH4 ? thf at ?78 °C, followed by room‐temperature reaction with three equivalents of [Mn2(CO)10] yielded a manganese hexahydridodiborate compound [{(OC)4Mn}(η6‐B2H6){Mn(CO)3}2(μ‐H)] ( 1 ) and a triply bridged borylene complex [(μ3‐BH)(Cp*Co)2(μ‐CO)(μ‐H)2MnH(CO)3] ( 2 ). In a similar fashion, [Re2(CO)10] generated [(μ3‐BH)(Cp*Co)2(μ‐CO)(μ‐H)2ReH(CO)3] ( 3 ) and [(μ3‐BH)(Cp*Co)2(μ‐CO)2(μ‐H)Co(CO)3] ( 4 ) in modest yields. In contrast, [Ru3(CO)12] under similar reaction conditions yielded a heterometallic semi‐interstitial boride cluster [(Cp*Co)(μ‐H)3Ru3(CO)9B] ( 5 ). The solid‐state X‐ray structure of compound 1 shows a significantly shorter boron–boron bond length. The detailed spectroscopic data of 1 and the unusual structural and bonding features have been described. All the complexes have been characterized by using 1H, 11B, 13C NMR spectroscopy, mass spectrometry, and X‐ray diffraction analysis. The DFT computations were used to shed light on the bonding and electronic structures of these new compounds. The study reveals a dominant B?H?Mn, a weak B?B?Mn interaction, and an enhanced B?B bonding in 1 . 相似文献
15.
In the presence of N, N′‐dicyclohexylcarbodiimide (DCC), (Bu4N)2[Mo6O18(NAr)] ( 1 ) and (Bu4N)2[Mo6O17(NAr)2] ( 2 ), Ar = o‐CH3C6H4, have been synthesized via the reaction of [α‐Mo8O26]4— with o‐toluidine. If the hydrochloride salt of o‐toluidine was added into the reactive mixture, only the monofunctionalized imido derivative of [Mo6O19]2— was obtained; the bifunctionalized derivative of [Mo6O19]2— was exclusively synthesized in the presence of non‐protonated o‐toluidine. The molecular and crystal structures of the hybrid compounds 1 and 2 were determined by X‐ray single crystal diffraction, and their UV, IR and NMR spectra were compared. Additionally, a possible reaction mechanism was proposed. 相似文献
16.
Investigations of Sb–Sb Bond Formation Reactions in the Coordination Sphere of Transition Metals The reaction of SbCl3 with various transition metal metalates of the type K[MLn] [MLn = Ni(CO)Cp*, Fe(CO)Cp′, Co(CO)4; Cp* = η5‐C5Me5, Cp′ = η5‐C5H4Me] in the presence of [Cr(CO)5thf] have been studied. With K[Ni(CO)Cp*] and K[Fe(CO)2Cp′] the trigonal‐pyramidal complexes [(μ3‐Sb){Ni(CO)Cp*}3] ( 1 ) and [(μ3‐Sb){Fe · (CO)2Cp′}3] ( 2 ), respectively, are obtained. The reaction with K[Co(CO)4] leads to the tetrahedral cluster [Co3(CO)9(μ3‐Sb{Cr(CO)5})] ( 3 ) and the butterfly cluster [Co2(CO)6(μ‐SbCl)(μ‐SbCl{Cr(CO)5})] ( 4 ). All products are characterised by X‐ray crystal structure determination. In contrast to the corresponding [(CO)5CrPCl3] system forming P–P bonds, starting from SbCl3/[Cr(CO)5thf] does not cause a Sb–Sb bond formation. 相似文献
17.
Haijun Hao Herbert W. Roesky Chunming Cui Hans‐Georg Schmidt Mathias Noltemeyer Peihua Yu Guangcai Bai 《无机化学与普通化学杂志》2000,626(2):368-373
Treating [Cp*V(μ‐Cl)2]3 (Cp* = C5Me5) and [(2,6‐i‐Pr2C6H3N)2MoMe2], respectively, with Me3SnF afforded the title compounds [Cp*V(μ‐F)2]4 ( 1 ) and [(2,6‐i‐Pr2C6H3N)2MoF2] · THF ( 2 ). 1 has a tetrameric structure, in which four V atoms can be regarded as being arranged at the vertices of a distorted tetrahedron, with four long edges bridged by one F atom and each of the other two short edges bridged by two F atoms with a mean V–F bond length of 2.00 Å. A hydrolyzed product of 2 , [(2,6‐i‐Pr2C6H3N)6Mo4(μ3‐F)2Me2(μ‐O)4] ( 3 ) was characterized by elemental analyses and X‐ray single crystal study. The X‐ray diffraction analysis reveals that 3 has a unique tetranuclear structure, containing two five and two six coordinated Mo atoms connecting each other by four μ‐O and two μ3‐F atoms. The geometries around the two Mo atoms can be described having distorted trigonal bipyramidal and distorted octahedral coordination spheres, respectively. The Mo–(μ‐O) bond lengths are 1.813 Å (average) for five coordinated Mo atoms and 2.030 Å (average) for those of six coordinated, respectively, indicating an additional π bonding between five coordinated Mo atoms and the μ‐O atoms. The Mo–(μ3‐F) distances range from 2.291 to 2.352 Å. 相似文献
18.
Synthesis, Crystal Structures, and Vibrational Spectra of [Pt(N3)6]2– and [Pt(N3)Cl5]2–, 195Pt and 15N NMR Spectra of [Pt(N3)nCl6–n]2– and [Pt(15NN2)n(N215N)6–n]2–, n = 0–6 By ligand exchange of [PtCl6]2– with sodium azide mixed complexes of the series [Pt(N3)nCl6–n]2– and with 15N‐labelled sodium azide (Na15NN2) mixtures of the isotopomeres [Pt(15NN2)n(N215N)6–n]2–, n = 0–6 and the pair [Pt(15NN2)Cl5]2–/[Pt(N215N)Cl5]2– are formed. X‐ray structure determinations on single crystals of (Ph4P)2[Pt(N3)6] ( 1 ) (triclinic, space group P1, a = 10.175(1), b = 10.516(1), c = 12.380(2) Å, α = 87.822(9), β = 73.822(9), γ = 67.987(8)°, Z = 1) and (Ph4As)2[Pt(N3)Cl5] · HCON(CH3)2 ( 2 ) (triclinic, space group P1, a = 10.068(2), b = 11.001(2), c = 23.658(5) Å, α = 101.196(14), β = 93.977(15), γ = 101.484(13)°, Z = 2) have been performed. The bond lengths are Pt–N = 2.088 ( 1 ), 2.105 ( 2 ) and Pt–Cl = 2.318 Å ( 2 ). The approximate linear azido ligands with Nα–Nβ–Nγ‐angles = 173.5–174.6° are bonded with Pt–Nα–Nβ‐angles = 116.4–121.0°. In the vibrational spectra the PtCl stretching vibrations of (n‐Bu4N)2[Pt(N3)Cl5] are observed at 318–345, the PtN stretching modes of (n‐Bu4N)2[Pt(N3)6] at 401–428 and of (n‐Bu4N)2[Pt(N3)Cl5] at 408–413 cm–1. The mixtures (n‐Bu4N)2[Pt(15NN2)n(N215N)6–n], n = 0–6 and (n‐Bu4N)2[Pt(15NN2)Cl5]/(n‐Bu4N)2[Pt(N215N)Cl5] exhibit 15N‐isotopic shifts up to 20 cm–1. Based on the molecular parameters of the X‐ray determinations the vibrational spectra are assigned by normal coordinate analysis. The average valence force constants are fd(PtCl) = 1.93, fd(PtNα) = 2.38 and fd(NαNβ, NβNγ) = 12.39 mdyn/Å. In the 195Pt NMR spectrum of [Pt(N3)nCl6–n]2–, n = 0–6 downfield shifts with the increasing number of azido ligands are observed in the range 4766–5067 ppm. The 15N NMR spectrum of (n‐Bu4N)2[Pt(15NN2)n(N215N)6–n], n = 0–6 exhibits by 15N–195Pt coupling a pseudotriplett at –307.5 ppm. Due to the isotopomeres n = 0–5 for terminal 15N six well‐resolved signals with distances of 0.03 ppm are observed in the low field region at –201 to –199 ppm. 相似文献
19.
《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(40):12270-12274
We report the rational design of metal–organic layers (MOLs) that are built from [Hf6O4(OH)4(HCO2)6] secondary building units (SBUs) and Ir[bpy(ppy)2]+‐ or [Ru(bpy)3]2+‐derived tricarboxylate ligands (Hf‐BPY‐Ir or Hf‐BPY‐Ru; bpy=2,2′‐bipyridine, ppy=2‐phenylpyridine) and their applications in X‐ray‐induced photodynamic therapy (X‐PDT) of colon cancer. Heavy Hf atoms in the SBUs efficiently absorb X‐rays and transfer energy to Ir[bpy(ppy)2]+ or [Ru(bpy)3]2+ moieties to induce PDT by generating reactive oxygen species (ROS). The ability of X‐rays to penetrate deeply into tissue and efficient ROS diffusion through ultrathin 2D MOLs (ca. 1.2 nm) enable highly effective X‐PDT to afford superb anticancer efficacy. 相似文献
20.
A polyoxometalate‐based inorganic–organic hybrid compound [CoII(2, 2′‐bpy)2]2[Mo8O26] ( 1 ) was synthesized by hydrothermal methods and structurally characterized by IR spectrum, TG analysis and X‐ray diffraction. The compound crystallizes in the monoclinic system, space group P21/n, a = 10.0681(2), b = 16.4467(2), c = 15.7838(3) Å, β = 100.046(1)°, V = 2573.52(8) Å3, Z = 2. The structure of 1 is built up from β‐[Mo8O26]4? subunits covalently linked via [CoII(2, 2′‐bpy)2]2+ fragments into a infinite 1D {[CoII(2, 2′‐bpy)2]2[Mo8O26]}∞ polymer. 相似文献