BOND LENGTHS OF BUCKY-BALLS C_(60), C_(240), C_(540), AND C_(960)

ＢＯＮＤＬＥＮＧＴＨＳＯＦＢＵＣＫＹ－ＢＡＬＬＳＣ_（６０），Ｃ_（２４０），Ｃ_（５４０），ＡＮＤＣ_（９６０）￥ＬｅｉＬＩＵ；ＫａｉＴａｉＣＨＥＮ；ａｎｄＹｕＦｅｎＬＩ（ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ，ＦｕｄａｎＵｎｉｖｅｒｓｉｔｙ，Ｓｈａｎ...     

Synthesis and Crystal Structure of Complex of Zinc（Ⅱ） with Schiff Base—{Zn［CH_3O（O）－C_6H_3CH_3＝NN＝C（S）NH_2］（DMF）}_2

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＣｏｍｐｌｅｘｏｆＺｉｎｃ（Ⅱ）ｗｉｔｈＳｃｈｉｆｆＢａｓｅ—{Ｚｎ［ＣＨ_３Ｏ（Ｏ）－Ｃ_６Ｈ_３ＣＨ_３＝ＮＮ＝Ｃ（Ｓ）ＮＨ_２］（ＤＭＦ）}_２ＣｕｉＸｕｅ－Ｇｕｉ；ＨｕＱｉｎｇ－Ｐｉｎｇ（Ｄ...     

Crystal Structure of[Ru(taab)(DMF)_2]·[(CIO_4)_2]

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ［Ｒｕ（ｔａａｂ）（ＤＭＦ）_２］·［（ＣＩＯ_４）_２］￥ＤｕａｎＣｈｕｎ－Ｙｉｎｇ；ＬｕＺｈｏｎｇ－Ｌｉｎ；ＴｉａｎＹｕ－Ｐｅｎｇ；ＹｏｕＸｉａｏ－Ｚｅｎｇ；ＣｈｅｎＹａｏ（ＣｏｏｒｄｉｎａｔｉｏｎＣｈｅｍｉｓｔ?..     

SiO_2-SUPPORTED HRh(DPPE)_2 GATALYST

ＳｉＯ_２－ＳＵＰＰＯＲＴＥＤ ＨＲｈ（ＤＰＰＥ）_２ ＧＡＴＡＬＹＳＴ￥ＣｈａｎｇＰｉｎｇＳＨＡＯ；ＪｉｅＹｕＷＡＮＧａｎｄＨｅＦｕＧＵＯ（ＤａｌｉａｎＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｃａｌＰｈｙｓｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃ...     

Structure of Palisadin B,C_(15)H_(24)Br_2O

ＳｔｒｕｃｔｕｒｅｏｆＰａｌｉｓａｄｉｎＢ，Ｃ_（１５）Ｈ_（２４）Ｂｒ_２Ｏ￥ＨｕａｎｇＹｏｕ－Ｑｉｎｇ；ＨｕＳｈｅｎｇ－Ｚｈｉ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＸｉａｍｅｎＵｎｉｖｅｒｓｉｔｙ，Ｘｉａｍｅｎ，３６１００５）ＺｈｏｎｇＹｏ?..     

Synthesis and X－ray Structure of Solvated Mono－cyclopentadienyl Samarium Dichloride（C_5H_5）SmCl_2（THF）_3

ＳｙｎｔｈｅｓｉｓａｎｄＸ－ｒａｙＳｔｒｕｃｔｕｒｅｏｆＳｏｌｖａｔｅｄＭｏｎｏ－ｃｙｃｌｏｐｅｎｔａｄｉｅｎｙｌＳａｍａｒｉｕｍＤｉｃｈｌｏｒｉｄｅ（Ｃ_５Ｈ_５）ＳｍＣｌ_２（ＴＨＦ）_３￥ＱｉａｎＣｈａｎｇ－Ｔａｏ；ＺｈｕＤｕｎ－Ｍｉｎｇ；ＳｕｎＪ...     

Crystal Structure of [La(NCS)_3(18-crown-6)(DMF)]

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ[Ｌａ（ＮＣＳ）_３（１８－ｃｒｏｗｎ－６）（ＤＭＦ）]ＭａｏＪｉａｎｇ－Ｇａｏ（ＦｕｊｉａｎＩｎｓｔｉｔｕｔｅｏｆＲｅｓｅａｒｃｈｏｎｔｈｅＳｔｒｕｃｔｕｒｅｏｆＭａｔｔｅｒ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｆｕｚｈ?..     

EPR Study of a New Crystal of the Binuclear Copper（Ⅱ） Cluster Compound－〔Cu_2（α－C_（10）H_7CH_2CO_2）_4－（DMF）_2〕·（DMF）_2·H_2O

ＥＰＲＳｔｕｄｙｏｆａＮｅｗＣｒｙｓｔａｌｏｆｔｈｅＢｉｎｕｃｌｅａｒＣｏｐｐｅｒ（Ⅱ）ＣｌｕｓｔｅｒＣｏｍｐｏｕｎｄ－〔Ｃｕ_２（α－Ｃ_（１０）Ｈ_７ＣＨ_２ＣＯ_２）_４－（ＤＭＦ）_２〕·（ＤＭＦ）_２·Ｈ_２Ｏ￥ＳｕｎＱｉｏｎｇ－Ｌｉ；ＨｕａｎｇＸ?..     

Syntheses， Structuresand Reactivity of Incomplete Cubane－like Compound［｛W_3S_4｝｛S_2P（OEt）_2｝_4（H_2O）］and Its Derivates

Ｓｙｎｔｈｅｓｅｓ,ＳｔｒｕｃｔｕｒｅｓａｎｄＲｅａｃｔｉｖｉｔｙｏｆＩｎｃｏｍｐｌｅｔｅＣｕｂａｎｅ－ｌｉｋｅＣｏｍｐｏｕｎｄ［｛Ｗ_３Ｓ_４｝｛Ｓ_２Ｐ（ＯＥｔ）_２｝_４（Ｈ_２Ｏ）］ａｎｄＩｔｓＤｅｒｉｖａｔｅｓ￥ＷｕＸｉｎ－Ｔａｏ;ＷａｎｇＱｕａ...     

Crystal Structure of Organometallic Complex [Zn（pom）2I2]

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆＯｒｇａｎｏｍｅｔａｌｌｉｃＣｏｍｐｌｅｘＺｎ（ｐｏｍ）_２Ｉ_２］ＤｏｎｇＭｅｉ－Ｂｉｎ；ＬｉＳｏｎｇ－Ｘｉａｎ；ＺｈａｎｇＨａｎ－Ｈｕｉ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＦｕｚｈｏｕＵｎｉｖｅｒｓｄｙ...     

Large heteropolymetalate complexes formed from lanthanide (Y, Ce, Pr, Nd, Sm, Eu, Gd), nickel cations and cryptate [As4W40O140]: synthesis and structure characterization

A new family of heteropolytungstate complexes (NH₄)₂₁[Ln(H₂O)₅{Ni(H₂O)}₂As₄W₄₀O₁₄₀]·xH₂O(Ln=Y, Ce, Pr, Nd, Sm, Eu, Gd) were prepared by the reaction of Na₂₇[NaAs₄W₄₀O₁₄₀]·60H₂O with NiCl₂·6H₂O and Ln(NO₃)₃·xH₂O at pH≈4.5. The crystal structures of (NH₄)₂₁[Gd(H₂O)₅{Ni(H₂O)}₂As₄W₄₀O₁₄₀]·51H₂O was determined by X-ray diffraction analysis and element analysis. The compound crystallizes in the monoclinic space group P2₁/n with a=19.754(3), b=24.298(4), c=39.350(6) Å, β=100.612(3)°, V=18564(5) ų, Z=2, R1(wR₂)=0.0544(0.0691). The central site S1 and two opposite sites S2 of the big cyclic ligand [As₄W₄₀O₁₄₀]²⁸⁻ are occupied by one Ln³⁺and two Ni²⁺, respectively, each site supply four O_d coordinating to metal ion, another one water molecule and other five water molecules coordinate, respectively, to Ni²⁺and Ln³⁺. Polyanion [Ln(H₂O)₅{Ni(H₂O)}₂As₄W₄₀O₁₄₀]²¹⁻ has C_2v symmetry. IR and UV–vis spectra of [NaAs₄W₄₀O₁₄₀]²⁷⁻ of the title compounds are discussed.     

一个钼钒二聚体簇合物的合成及其性能

以NH₄VO₃, H₃PMo₁₂O₄₀·xH₂O, Cu(NO₃)₂和哌嗪为主要原料,采用水热方法,合成了一个新的钼钒二聚体簇合物--(H₂NC₄H₈NH₂)₆［Mo^VI₁₆V^V₁₂P₂O₈₄］·5H₂O(1),其结构和性能经UV-Vis, IR, X-射线衍射、光电子能谱及热重分析表征。1属单斜晶系,P2(1)/c空间群, 晶胞参数a=20.450(4) , b=24.989(5) , c=20.450(4) , β=93.89 °, V=10 427(4) ³, Fw=4 159.18, Dc=2.650 g·cm^-3, μ=3.018 mm^-1, F(000)=7 952, Gof=1.029。晶体结构解析表明：1由两个单元Keggin型簇核［PMo₈V₆O₄₂］^7-聚合而成一个二聚体簇［P₂Mo_l6V₁₂O₈₄］^14-,该二聚体簇核和有机配体哌嗪之间通过复杂的氢键相互作用,展示三维超分子网络结构。     

Catalysis by hetropoly compounds. Part XXVI. Gas phase synthesis of methyl tert-butyl ether over heteropolyacids

Gas phase synthesis of methyl tert-butyl ether (MTBE) from methanol and isobutylene has been studied with several heteropolyacids at 303–383 K. It was found that a Dawson-type heteropolyacid, H₆P₂W₁₈O₆₂, was much active than Keggin-type heteropolyacids, H_nXW₁₂O₄₀ (X = P, Si, Ge, B, and Co), and other solid acids such as SO²⁻₄/ZrO₂, SiO---Al₂O₃ and H-ZSM-5 at 323 K. Since the acid strength of H₆P₂W₁₈O₆₂ was weaker than H₃PW₁₂O₄₀ and H₄SiW₁₂O₄₀, factors other than the acid strength are important for the catalytic activity. Pseudoliquid phase behavior was demonstrated for H₆P₂W₁₈O₆₂ and H₃PW₁₂O₄₀ by the measurements of the absorption of methanol during the reaction and by the unique pressure dependencies of the rate of synthesis. From the absorption data (the amount and rate), it is concluded that the high catalytic activity of H₆P₂W₁₈O₆₂ is brought about by a high-activity state of the pseudoliquid phase in which controlled amounts of molecule are absorbed and the absorption-desorption is rapid. On the other hand, the pseudoliquid phase of H₃PW₁₂O₄₀ is in a low-activity state absorbing excessive amounts of molecule.     

One Dimensional Iron Molybdophosphate Anionic Chains with Different Structural Arrangements Reflecting a Flexibility Character

Structural comparison of a new compound[(bpp)₃H₆]Fe₂^IIIFe₂^IIMo₂₄^V(H₂PO₄)₈(HPO₄)₄(PO₄)₄O₄₈(OH)₁₂· (H₂O)₄·2H₂O(1)[bpp=1,3-di(4-pyridyl)propane] with our previously reported two compounds[(bpy)₃Fe^II]₃· Fe₂^IIIFe₂^IIMo₂₄^V(H₂PO₄)₈(HPO₄)₄(PO₄)₄O₄₈(OH)₁₂(H₂O)₄·12H₂O(2) and[(bpy)₃Fe^II]₂Fe^IIFe^IIIMo₁₂^V(H₂PO₄)₂(H_2-xPO₄)·(H_1+xPO₄)(HPO₄)₂(PO₄)₂O₂₄(OH)₆(H₂O)₂·9H₂O(x=0―1)(3)(bpy=2,2'-bipyridine), which all exhibit one-dimensional mixed-valence iron molybdophosphate anionic chains constructed by alternating connection of Fe^III ions and magic[Fe^II(Mo₆P₄O₃₁)₂] units, reveals that the non-hydrogen atomic ratios of Mo:Fe:P:O within the polymeric anionic chains are the same for all the three compounds, while the polymeric anionic chains of the different compounds bear different numbers of negative charges. And therefore there exist different numbers of counter cations per {Fe₂^III[Fe₂^II(P₁₆Mo₂₄^VO₁₂₄)]} unit found in the titled compounds. It discloses that not only are the spatial assembling of counter cations and polymeric inorganic chains of three compounds quite different, but also the O―Fe^III―O bond angles and Fe^III―O bond lengths of the three different inorganic chains exhibit small differences. What is more important is that such small changes in bond length and bond angle in the assemblage of Fe^III―O bonds lead to the considerable fluctuations of inorganic chains in their structural conformation within the three compounds, reflecting an interesting phenomenon of “flexibility" in the pure inorganic one dimensional mixed-valence iron molybdophosphate chains.     

Esterification of phthalic anhydride with 1-butanol and 2-ethylhexanol catalyzed by heteropolyacids

Esterification of phthalic anhydride with 2-ethylhexanol and 1-butanol and ester decomposition of dioctyl phthalate (DOP) in presence of Keggin; H₃PW₁₂O₄₀, H₄SiW₁₂O₄₀, H₄SiMo₁₂O₄₀, Wells–Dawson; H₆P₂W₁₈O₆₂, H₆P₂W₁₇MoO₆₂ and Preyssler; H₁₄[NaP₅W₂₉MoO₁₁₀], H₁₄[NaP₅W₃₀O₁₁₀], type heteropolyacids have been investigated. The heteropolyacids with Preyssler and Wells–Dawson structures and their molybdenum substituted derivatives show higher activity in esterification and ester decomposition reactions than Keggin type heteropolyacids. A complete conversion of phthalic anhydride to dioctyl phthalate and dibutyl phthalate are achieved in 2 h in presence of molybdenum substituted Preyssler heteropolyacid. In the decomposition of dioctyl phthalate in the presence of Preyssler heteropolyacid, 2-ethylhexene is formed in quantitative yield.     

New Supramolecular Networks Based on Paratungstate with N-Donor Bridging Ligands

Three new supramolecular networks based on paratungstate and N-donor bridging ligands, [H₂bpmp]_2.5H[H₂W₁₂O₄₀]2H₂O(1), [H₂(bpp)]₂[H(py―CH₃)]_0.25[H(py―C₂H₅)]_0.25H_1.5[H₂W₁₂O₄₀]·4H₂O(2) and [H₂pip]₃[H₂W₁₂O₄₀](3)[bpmp=N,N'-bis(4-pyridylmethyl)piperazine; bpp=1,3-bis(4-pyridyl)propane; py=pyridine; pip=piperazine] were prepared by the hydrothermal synthesis and characterized by elemental analysis, infrared(IR), thermogravimetric(TG) analysis and single-crystal X-ray diffraction(XRD). All the compounds show high-dimen- sional supramolecular networks based on [H₂W₁₂O₄₀]^6- and the protonated N-donor ligands via the N―H···O―W hydrogen bonds and/or π···π stacking interactions. Their luminescent properties were investigated.     

镧系元素Dawson结构钨钒磷四元杂多配合物的合成、表征以及对H2O2分解的催化活性

合成了通式为K₁₅H₃[Ce(P₂W₁₆VO₆₁)₂]·61H₂O、K₁₅H₄[Ln(P₂W₁₆VO₆₁)₂]·xH₂O(Ln=La³⁺,Pr³⁺,Nd³⁺,Sm³⁺,Eu³⁺,Gd³⁺,Dy³⁺,Yb³⁺)的9种镧系元素Dawson结构的钨钒磷四元杂多配合物,并用IR、UV、NMR、ESR、XRD、TG-DTA等对其结构和性质进行了研究。该类配合物具有与K₁₆[Ce(P₂W₁₇VO₆₁)₂]·50H₂O类似的结构,对H₂O₂分解有较高的催化活性。     

A Novel Ferroferric Polyoxotungstate:Synthesis,Structure and Magnetic Properties of Na5[Fe2.5(H2O)10W12O42]·ca.32 H2O

Due to the variety of their components, structures and properties, significant attention continues to be focused on the polyoxometalatic anions in many research fields such as catalysis, biology, medicine and materials science¹. When the aqueous solution of Na₂WO₄·2H₂O was reduced by iron powder in CH₃COOH (30%), crystals of Na₅[Fe_2.5(H₂O)₁₀W₁₂O₄₂]·ca.32 H₂O 1, which crystallizes in the triclinic space group P 1 with a=12.121(2), b=12.426(3), c=l3.247(3) Å, α=68.33(3), β=71.33(3), γ=71.44(3)° and Z=l, precipitated after several weeks.     

稀土冠醚类络合物的研究(Ⅲ)——硝酸钪与邻苯二酮-17-冠-5及邻苯二酮-14-冠-4固态络合物的合成与性质

制得硝酸钪与两种冠醚的固态络合物,确定其组成为Sc(NO₃)₃·C₁₆H₂₀O₇·H₂O及Sc(NO₃)₃·C₁₄H₁₆O₆·H₂O。研究了冠醚本身及其钪的相应络合物的合成及有关性质。     

Extended structural materials constructed from sulfate-centered Preyssler-type polyoxometalate with excellent electrocatalytic property

The sulfate-centered Preyssler-type polyoxometalate was firstly used to construct inorganic-organic hybrid materials, which exhibits excellent electrocatalytic activity toward reduction of H₂O₂ and NO₂^-.