Synthesis and Reaction of [MnRe（CO）6（μ—SH）（μ—SC（H）PPr^i3）（PPh3）]

The synthesis,the crystal structure and the reaction of the hetero-binuclear complex[MnRe(CO)6(μ-SH）（μ-SC(H)PPr^i3)(PPh3)] are reported.The results of single crystal X-ray structure analysis showed that the fragments Mn(CO)3 and Re(CO)3 were bridged by SH and SC(H)PPr^i3.The title complexes can react with Bu^nLi and RX forming complexes MnRe(CO)6(μ-SR）（μ-SC(H)PPr^i3)(PPh3)](R=Me,CH2CH=CH2,SnBu3^n).     

Introduction of Constrained Cyclic Skeleton into β-Enaminoketonato Vanadium Complexes: A Strategy for Stabilization of Active Centre of Vanadium Catalyst for Ethylene Polymerization

Several novel mono( ?-enaminoketonato) vanadium complexes bearing constrained cyclic skeleton, including[(C6H5)C6H3C(O) = C(CH2)nCH = N ― Ar]VCl2(THF)2(V3a: n = 1, Ar = C6H5; V4a: n = 2, Ar = C6H5; V4b: n = 2, Ar =C6F5; V4c: n = 2, Ar =(C3H7)2C6H3; V5a: n = 3, Ar = C6H5), were synthesized and their structure and properties were characterized. The structures of V4 c and V5 a in solid-state were further confirmed by X-ray crystallographic analysis.Density functional theory(DFT) results indicated that these complexes showed enhanced steric hindrance around the metal center as compared with the acyclic analogues. Upon activation with Et2 Al Cl and in the presence of ethyl trichloroacetate as a reactivator, all of the complexes exhibited high catalytic activities(107 g PE/(mol V·h)) toward ethylene polymerization, and the obtained polymers exhibited unimodal distributions(Mw/Mn = 2.0-2.3) even produced at elevated temperatures(70-100 °C) and prolonged reaction time. When MAO was employed as a cocatalyst, they only showed moderate catalytic activities(105 g PE/(mol V·h)), but the resulting polymers had higher molecular weights(168-241 kg/mol). These vanadium complexes with cyclic skeleton also showed high catalytic activities toward ethylene/norbornene copolymerization. The produced copolymers displayed approximate alternating structure at high in-feed concentration of norbornene. The catalytic capabilities of these complexes could be tuned conveniently by varying ligand structure. Furthermore, the cyclic voltammetry results also proved that these complexes exhibited better redox stabilities than the complexes bearing linear skeleton.     

[Co_3(1,2-S2C6H4)_3(PPh_3)_3]+, A basic triangle unit of some polynuclear molecules

[Co3(1,2-S2C6H4)3(PPh3)3][CoBr3(DMF)].sol (1, sol=CHCl3,O(C2H5)2,H2O) was obtained from the reaction of CoBr(PPh3)3 with Na2(S2C6H4) in chloroform. The Co3 core in the cation of 1 exhibits a metal-metal bonded isosceles triangle, in which the two longer Co-Co bonds are both bridged by S2C6H4 ligands on two sides of the triangle plane respectively, while the bottom short Co-Co bond is bridged by the third bidentate S2C6H4 ligand. A series of polynu-clear cobalt cluster compounds with phosphine, thiolate and/or sulphur ligands were prepared by low oxidation state Co+ with thiolates in organic solvents. These tri-, tetra-, hexa-, heptanuclear cluster compounds 1-8 with various types of crystal structures can be viewed as the condensed polynuclear cobalt complexes that the cobalt atom frameworks with sulphur bridged were built through the small triangular units of [Co3S3nL3] (n=1,2) with or without [CoL] (L=PR3, Br, Cl, 5-C5H5) fragments.     

STUDIES ON ORGANO-MOLYBDENUM AND TUNGSTEN COMPOUNDS(Ⅲ)——CATALYTIC POLYMERIZATION OF ACETYLENE BY M-O-C BOND-CONTAINING COMPLEXES OF Mo AND W

Catalytic polymerization of acetylene in the presence of n5-C5H5-M-(CO)3 R (M=Mo,W;R=CH3-,C2H5-) has been studied.The results show that these complexes possess catalytic activities for the polymerization and copolymerization of monosubstituted acetylene.The catalytic mechanism has been preliminarily discussed.It is suggested that the active species be metal-car-bene.In our previous publications we reported the synthesis of some new Fischer's molybdenum and tungsten-carbene complexes and catalytic activity for alkyne polymerization.The results show that the activity of Fischer's molybdenum-carbene is higher than that of tungsten.The catalytic polymerization of alkyne by M-σ-c bond-containing complexes of molybdenum and tungsten has not been reported yet in literature.Therefore,four M-σ-C bondontaining complexes of molybdenum and tungsten were synthesized by using the method reported in the literature,and catalyst polymerization of alkyne by these complexes was examined.     

Synthesis and Thermal Rearrangement of Tetramethyldisilane-bridged Bis(cyclopentadienyl) Diiron Complexes with Bis(phosphine)Substitution

Photolysis of [Me2SiSiMe2)[C5H4Fe(CO2)]2with a series of bis(phosphine)ligands Ph2P(CH2)n PPh2(n=1-4) leads to the formation of the corresponding diiron complexes with intramolecular and intermolecular bis(phosphine) substitution.When these complexes were heated in refluxing xylene.only in the complexes with intermolecular bis(phosphine )substitution the thermal rearrangement reaction occurred.     

Cleavage of the Fe—Fe Bond of （Me2SiSiMe2） [η^5－C5H4Fe（CO）2]2 with Na／Hg and Molecular Structure of the Ring－Opened Complex

The reaction of the rifle cyclic complex (1) with sodium amalgam in THF resulted in the expected cleavage of the Fe-Fe bond to afford his-sodium salt ( Me2SiSiMe2 ) [η^5-C5H4Fe(CO)2]2 (4). The latter was not isolated and was used directly to react with MeI, PhCH2Cl, CH3C(O)Cl, PhC(O)Cl,Cy3SnCl (Cy= cyclohexyl) or Ph3SnCl to afford corresponding ring-opened derivatives (Me2SiSiMe2) [η^5-C5H4Fe(CO)2]2 [5, R=Me; 6, R=PhCH2; 7, R=CH3C(O); 8, R=PhC(O); 9, R = Cy3Sn or 10, R = Ph3Sn ]. The crystal and molecular structures of 10 were determined by X-ray diffraction analysis. The molecule took the desired ant/ conformation around the Si-Si bond. The length of the Si--Si bond is 0.2343(3)nm, which is essentially identical to that in the cyclic structure of 1[0.2346(4) tun]. This result unambiguously demonstrates that the Si--Si bond in the cyclic structure of 1 is not subject to obvious strain.     

Syntheses and Crystal Structures of Benzyl-and Cyclopentyl-Cyclopentadienyl Sodium Tetrahydrofuranate Complexes

The present paper covers syntheses and crystal structures of benzyl- and cy-clopentyl-cyclopentadienyl sodium tetrahydrofuranate complexes C6H5CH2C5H4Na·THF (1) and C5H9C5H4Na°THF (2). X-ray diffraction data of the title compounds were collected at a low temperature (about 210K). Structures of both the crystals belong to monoclinic space group P21/n with α=0. 9316(3) nm, b=1. 5161(4) nm, c= 0.9791(3) nm, β=91. 06(3)°Z=4 for (1) and α=1. 6120(7) nm, b=0. 9370(3) nm, c=1. 8475(7) nm, β=109.52(3)°Z = 8 for (2). Both structures were solved by using direct methods and refined by block-matrix least-squares to final values of R = 0. 044 for 520 observed reflections (1) and R = 0. 067 for 921 observed reflections (2). In the crystals the tetrahydrofuranate complexes C6H5CH2C5H4Na·THF and C5H9C5H4Na·THF adopt a puckered chain structure with η5-(C6H5CH2)C5H4 and η5-(C5H9)C5H4 rings connected by a bridge Na (THF) unit.     

烃基取代茚基钌羰基化合物的合成及晶体结构(英文)

配体C9H7R(R=CH2CH2CH3(1),CH(CH3)2(2),C5H9(3),CH2C6H5(4),CH2CH=CH2(5))分别与Ru3(CO)12在二甲苯或庚烷中加热回流,得到了6个双核配合物[(η5-C9H6R)Ru(CO)(μ-CO)]2(R=CH2CH2CH3(6),CH(CH3)2(7),C5H9(8),CH2C6H5(9),CH2CH=CH2(10))和[(η5-C9H6)(H3CH2C)CHCH(CH2CH3)(η5-C9H6)][Ru(CO)(μ-CO)]2(11)。通过元素分析、红外光谱、核磁共振氢谱对配合物的结构进行了表征,并用X-射线单晶衍射法测定了配合物6,9,10和11的结构。     

Synthesis and characterization of MH···HOR dihydrogen bonded ruthenium and osmium complexes(η~5-C_5H_4CH_2OH)MH(PPh_3)_2(M = Ru,Os)

Treatment of RuCl2(PPh3)3 with 6-dimethylaminopentafulvene in THF in the presence of water produced(η5-C5H4CHO) RuCl(PPh3)2, which was reduced by NaBH4 to give the Ru–H···HO dihydrogen bonded complex(η5-C5H4CH2OH) RuH(PPh3)2. The dihydrogen bonded complex(η5-C5H4CH2OH)RuH(PPh3)2 could also be synthesized by the reduction of complex(η5-C5H4CHO)RuH(PPh3)2, which was obtained by the reaction of RuHCl(PPh3)3 with 6-dimethylaminopentafulvene in the presence of water. The analogous dihydrogen bonded osmium complex(η5-C5H4CH2OH)OsH(PPh3)2 was similarly prepared. Single crystal structures and DFT calculations support the presence of intra-molecular H···H interaction, with separations of around 1.9 to 2.0 .     

Syntheses and Structures of Two Ruthenium(Ⅲ) Complexes [Ru(PPh_3)_2(S_2CNR_2)Cl_2]·CH_2Cl_2(R=Et and ~iPr)

Oxidation reaction of [Ru(PPh3)3Cl2] with tetraethylthiuram disulfide [Et2NCS2]2 or tetra-iso-propylthiuram disulfide [iPr2NCS2]2 afforded ruthenium(Ⅲ) complexes [Ru(PPh3)2(S2CNR2) Cl2]·CH2Cl2(R=Et 1,iPr 2) which were characterized by single-crystal X-ray diffraction.Complex 1 crystallizes in triclinic,space group P with a = 11.5065(6),b = 12.1458(7),c = 18.0034(9) ,α = 109.380(4),β = 95.279(4),γ = 97.969(4)°,V = 2324.8(2) 3 and Z = 2.Complex 2 belongs to the monoclinic system,space group P21/n with a = 12.5752(3),b = 20.7562(5),c = 17.6821(3) ,β = 105.934(1)°,V = 4437.94(17) 3 and Z = 4.Both mononuclear complexes 1 and 2 have an octahedral configuration around the central ruthenium atom which is bonded to one chelated dithiocarbamate ligand,two PPh3 ligands in mutually trans and two chlorides in mutually cis positions.The average Ru-S,Ru-P and Ru-Cl bond lengths are 2.377(2),2.412(2) and 2.369(2)  for 1,and 2.376(2),2.414(1) and 2.383(2)  for 2,respectively.The electrochemical properties of these two complexes were studied in CH2Cl2 solution by cyclic voltammetry.     

MASS SPECTRA OF BIS (CYCLOPENTADIENYL)-BIS (ORTHO-PHENYLAMINOBENZOATO) TITANIUM AND ITS DERIVATIVES

<正> Four complexes of the types of Cp2Ti (OOCC6H4NHPh-o)2 and Cp2TiCl2(Cp=Cp, MeCp= (CH3C5H4-)) have been investigated under the electron impact condition. The experimental results of Cp2Ti(OOCC6H4NHPh-o)2 complexes suggest that the Ti -L (L =OOCC6H4NHPh-o) bond is weaker than Ti -Cp bond and their molecular ions are characterized by the ready loss of L ligands. On the other hand, the molecular ions of Cp2TiCl2 are characterized by the loss of Cp ligands. The characteristic ions [M-HCl]+ and [M - 2HCl]+ are observed in the spectra of (MeCp)2TiCl2.     

Rational synthesis, structural characterization and the third-order nonlinear optical properties of two new M-Cu-S (M = Mo or W) clusters

By the additional reaction of binuclear compounds (Me4N)2M2S4 (TDT)2 (M = Mo, W; H2TDT= H2CH3C6H3S2) with mononuclear cuprous complex, two new M-Cu-S clusters Mo2Cu2S4(TDT)2-(PPh3 )2·CH3CH2OH (1) and W2Cu2S4(TDT)2(PPh3)2·0.5CH3CH2OH-0.5H2O (2) have been prepared and characterized by IR, UV-Vis, 31P NMR spectroscopy, cyclic voltammetry and single crystal X-ray structure analysis . Both compounds crystallize in space group P 21 / n with lattice parameters a = 1.0956(3), b = 2.2072(3), c = 2.4340(3) nm, β= 100.36(2)°, V= 5.790(3) nm3 and Z = 4 for 1 and a = 1.0965(9),b= 2.2135(3), c = 2.4317(4) nm, β = 99.63(8)°, V= 5.819(8) nm3 and Z = 4 for 2. Both molecular structures contain a cubane-like cluster core [M2Cu2S4] (M = Mo, W) and their skeletons are almost the same except for M atoms. The syntheses, structures and spectrum characterizations of these two clusters are discussed. The third-order nonlinear optical (NLO) property of the two clusters was studied by the technique of forward degenerate four     

Synthesis and Crystal Structure of {(PPh3)2ClRu(μ-Cl)-Ru(PPh3)B10H7[OCH(CH3)2]3}·0.4(H2O)

The title compound has been synthesized by the reaction of [RuCl2(PPh3)3] and closo-[B10H10]2- in (CH3)2CHOH solution. Crystals suitable for a single crystal X-ray diffraction analysis were obtained from n-pentane diffused to CH2Cl2 solution. The crystal {(PPh3)2ClRu(μ-Cl)Ru(PPh3)B10H7[OCH(CH3)2]3}·0.4(H2O) is monoclinic , space group P21/n , Mr=1359.47, with a=19.434(4), b =14.340(4), c=25.865(9)(A), β= 95.48(3)°, V=7175(4)(A)3, Dc=1.258 g/cm3, Z=4, λ(MoKα)=0.71073(A),μ=6.03 cm-1, F(000)=2784, R=0.0631, wR2= 0.1425, S=1.001. The title compound is a bimetallic species in which the second ruthenium center is bound to the cluster {(PPh3)RuB10H7[OCH(CH3)2]3} via an Ru-Cl-Ru and two Ru-H-B-Ru bridges. The third isoproxy group replaces a hydrogen atom on B(10) of the cage, which indicates the activity of the cage.     

配合物[Fe(CO)3(PPh2R)2(HgCl2)] (R=pym,fur, py,thi)的Fe-Hg相互作用及31P化学位移

In order to study the effects of R group on Fe-Hg interactions and 31P chemical shifts, the structures of mononuclear complexes Fe(CO)3(PPh2R)2 (R=pym: 1, fur: 2, py: 3, thi: 4; pym=pyrimidine, fur=furyl, py=pyridine, thi=thiazole) and binuclear complexes [Fe(CO)3(PPh2R)2(HgCl2)] (R=pym: 5, fur: 6, py: 7, thi: 8) were studied by using the density functional theory (DFT) PBE0 method. The 31P chemical shifts were calculated by PBE0-GIAO method. Nature bond orbital (NBO) analyseswere also performed to explain the nature of the Fe-Hg interactions. The conclusions can be drawn as follows: (1) The complexes with nitrogen donor atoms are more stable than those with O or S atoms. The more N atom there are, the higher is the stabilitity of the complex. (2) The Fe-Hg interactions play a dominant role in the stabilities of the complexes. In 5 or 6, there is a σ-bond between Fe and Hg atoms, However, in 7 and 8, the Fe-Hg interations act as σP-Fe→nHg and σC-Fe→nHg delocalization. (3) Through Fe邛Hg interactions, there is charge transfer from R groups towards the P, Fe, and Hg atoms, which increases the electron density on P nucleus in binuclear complexes. As a result, compared with their mononuclear complexes, the 31P chemical shifts in binuclear complexes show some reduction.     

Synthesis and Crystal Structure of Cluster [C6H4-1,2-(CO2CH2C2H-μ)2][Co2(CO)6]2

The reaction of dipropargyl phthalate C6H4-1,2-(CO2CH2C2H-μ)2 1 with octacarbonyldicobalt 2 resulted in the formation of red complex [C6H4-1,2-(CO2CH2C2H-μ)2][Co2(CO)6]2 3, in which each Co2(CO)6 group coordinates to one of the two C≡C bonds of 1. Molecular structure of complex 3 was determined by single crystal X-ray analyses. The crystal belongs to the monoclinic system, space group P21/a with the following crystallographic parameters: a=8.521(2), b=29.143(6), c=12.918(7)(A), β= 100.12(3)°, V=3158(2)(A)3, Z=4, Mr=814.09, Dc=1.712 g.cm-3, F(000)=1608, μ(Mo-Kα)=21.37 cm-1 and final R=0.044 for 3151 observations.     

Reactivity study of a hydroxyl coordinated osmium vinyl complex OsCl2(PPh3)2[CH=C(PPh3)CHPh(OH)]

We studied the reactivity of an osmium vinyl complex containing a coordinated hydroxyl group OsCl2(PPh3)2[CH=C(PPh3)CHPh(OH)] (1) toward bidentate ligand 1,4-bis(diphenylphosphino)butane (DPPB),acid ligand (CO),base (Cs2CO3) and heat.Two osmium vinyl complexes OsCl2(dppb)[CH=C(PPh3)CHPh(OH)](2) and OsCl2(CO)2(PPh3)[CH=C(PPh 3)CHPh(OH)] (3),as well as two relatively rare phosphonium-containing osmafuran complexes Os(2-OCOO)(PPh3)2[CHC(PPh3)CPhO](4) and OsCl2 (PPh3)2[CHC(PPh3)CPhO](5),were obtained in high yields from these reactions.All products were characterized by NMR spectroscopy,elemental analysis,and their structures were further confirmed by single crystal X-ray diffraction.     

Synthesis and Structure of a Ruthenium（Ⅱ）-dithiocarbamate Complex [RuH（CO）（PPh_3）_2（4-ClPhNHCS_2）]·C_6H_（14）

The title complex [RuH(CO)(PPh3)2(4-ClPhNHCS2)]·C6H14 has been prepared and characterized by X-ray diffraction analysis.It crystallizes in the triclinic system,space group P1 with a = 11.0817(2),b = 14.3889(2),c = 15.2136(2) ,α = 71.018(1),β = 74.911(1),γ = 85.146(1)°,V = 2214.86(6) 3,Z = 2,Mr = 900.4,Dc = 1.350 g/cm3,Mr = 900.40,μ(MoKα) = 0.616 mm-1,F(000) = 926,S = 1.016,the final R = 0.0478 and wR = 0.0947 for 6828 observed reflections with I > 2σ(I) and 505 variables.The molecular structure of 1 consists of one neutral complex [RuH(CO)(PPh3)2(4-ClPhNHCS2)] and one hexane solvent molecule.The geometry around ruthenium is pseudo-octahedral with two trans-binding PPh3 ligands and one chelating bidentate 4-ClPhNHCS2- ligand via two sulfur atoms.The average Ru-S,Ru-P and Ru-H bond lengths are 2.4824(8),2.3495(8) and 1.71(2),respectively.The electrochemical properties of 1 have been studied in CH2Cl2 solution by cyclic voltammetry.     

A DFT Investigation on Hydrogen Adsorption Based on Alkali-metal Organic Complexes

Using density functional theory calculation based on the B3LYP method,we have studied the interactions of H2 molecules with alkali-metal organic complexes C6H6-nLin(n = 1～3),C6H5Na and C6H5K.A significant part of the electronic charge of M s orbital(Li 2s,Na 3s,K 4s) is donated to phenyl and is accommodated by H2 bonding orbital.For all the complexes considered,each bonded alkali-metal atom can adsorb up to five H2 in molecular form with the mean binding energy of 0.59,0.55 and 0.56 eV/H2 molecule for C6H6-nLin(n = 1～3),C6H5Na and C6H5K,respectively.The kinetic stability of these hydrogen-covered organometallic complexes is discussed in terms of energy gap between HOMO and LUMO.It is remarkable that these alkali-metal organic complexes can store up to 23.80 wt% hydrogen.Therefore,the complexes studied may be used as hydrogen storage materials.     

Synthesis and Structure of a Novel Cobalt(Ⅱ)Complex with the Tertiary Carbinol Derivative of Di-4-pyridinylmethanone

The title complex [Co[(4-C5H4N)2C(OH)(NHC3H7)]2(NO3)2]∞ was obtained and characterized through elemental analysis, FT-IR and X-ray crystallography. The complex crystallizes in space group P3(2)21 with a=10.2480(11), b=10.2480(11), c=26.943(6), β=120.00°, [Co[(4-C5H4N)2C(OH)(NHC3H7)]2(NO3)2]∞, C28H34CoN8O8 , Mr=669.56, Z=3, V=2450.5(7)3 , Dc=1.361 g·cm-3 , μ=0.584 mm-1 , F(000)=1047, R=0.0498 and wR=0.1301. The Co(Ⅱ) center exhibits a N4O2-octahedral coordination geometry surrounded by a pair of nitrates at the axial positions and four pyridyl N atoms at the equatorial sites. An infinite double-bridged chain structure with μ2-bridging (4-C5H4N)2C(OH)(NHC3H7) ligands is formed, which is the in situ product of metal-promoted nucleophilic addition reaction of propan-1-amine with di-4-pyridinylmethanone ((4-C5H4N)2CO) in the presence of Co(NO3)2·6H2O. It is the first tertiary carbinol metal complex derived from di-4-pyridinylmethanone so far, and also the rare example of tertiary carbinol derivative of dipyridylmethanone family. The nucleophilic reaction at the carbonyl of dipyridylmethanone in the presence of metal salt will be discussed.     

Synthesis,Crystal Structure and Photophysical Properties of Cu（Ⅰ） Complexes Containing 2,5-Bis（pyridyl）-1,3,4-oxadiazole

Four novel Cu(Ⅰ) complexes,[Cu(o-PYO)(PPh3)2]BF4(1),[Cu(o-PYO)(DPEphos)]BF4(2),[Cu2 (o-PYO)(PPh3)3(CH3CN)](BF4)2(3) and [Cu2(o-PYO)(DPEphos)2 ](BF4)2(4) (o-PYO=2,5bis(pyridyl)-1,3,4-oxadiazole,PPh 3=triphenylphosphine,DPEphos=bis(2-(diphenylphosphanyl)phenyl)ether),have been synthesized and characterized by 1 H NMR,elemental analysis and single-crystal X-ray diffraction.The central cuprous ions in all complexes are surrounded by N and P atoms to form a distorted tetrahedral geometry,although one of the cuprous ions in complex 3 is coordinated by a PPh3 and an acetonitrile molecule due to the steric hindrance and weak coordination ability from monodentate PPh3 ligand.The UV-vis absorption spectra in CH2Cl2 show the characteristic metal-to-ligand charge transfer (MLCT) absorption bands in the region of 360-480nm.Four Cu(I) complexes exhibit yellow to orange-red phosphorescence with the emission maximum at 572,577,562 and 597nm,respectively in the solid state.