The preparation and crystal structure of (η-C5H5)(OC)3Mo(CH2)3C6H5

The reaction of with p-CH₃C₆H₄S(O)₂O(CH₂)₃C₆H₅ produces (η⁵-C₅H₅)(OC)₃Mo(CH₂)₃C₆H₅. This is only the second structurally characterized organometallic species in which an aromatic moiety is separated by three or more methylene groups. The alkyl chain adopts a staggered conformation, the Mo-C(1)-C(2)-C(3)-C(4) unit is nearly coplanar, and the alkyl chain eclipses the trans-carbonyl group on Mo. NMR evidence indicates that this conformation is preserved in solution.     

X-ray and conformation analysis of the new trinuclear cluster of osmium Os3(μ,η2-OCC6H5)(η3-C3H5)(CO)9

The crystal structure of the Os₃(μ,η²-O=CC₆H₅)(η³-C₃H₅)(CO)₉ cluster synthesized by the reaction of the (μ-H)Os₃(μ-O=CC₆H₅)(CO)₁₀ complex with allylamine in chloroform was determined by X-ray analysis. Prolonged storage of the reaction mixture led to N-C bond cleavage in allylamine and η³-addition of the allyl fragment at one of the Os atoms (Os-C 2.246 ?, 2.248 ?, and 2.273 ?). The unit cell parameters of the complex are a = 9.494(1) ?, b = 10.479(1) ?, c = 12.474(2) ?, α = 84.55(1)°, β = 70.08(1)°, γ = 70.72(1)°, V = 1255.8(4), ?³, space group P , Z = 2; C₁₉H₁₀O₁₀Os₃; d _calc = 2.922 g/cm³, 3085 I _hkl > 2σ _I of 3611 collected reflections; R = 0.0252. The structure of Os₃(μ,η²-O=CC₆H₅)(η³-C₃H₅)(CO)₉ is molecular. The plane of the Os₃ triangle and the OsCOOs plane are connected according to the “butterfly” principle with an angle of 103.4° between them. The Os-Os distances in the cluster core vary from 2.836(1) ? to 2.844(1) ?; the Os-C_carb distances are 1.88(1)–1.97(1) ?; the distances to the atoms of the bridging ligands are Os-C 2.11(1) ?, Os-O 2.14(1) ?; the O-C bridging bond is 1.24(1) ?. of the Os₃(μ,η²-O=CC₆H₅)(η³-C₃H₅)(CO)₉ triosmium cluster were studied theoretically. The potential curve of the internal rotation of the allyl ligand relative to the Os(1)-C(9) bond was determined. The rotation barrier of the allyl ligand in crystal relative to the Os(1)-C(9) bond is 8.38 kJ/mol, and the rotation of the ligand is not hindered. The effects of the intra-and intermolecular interactions on the conformation state of the cluster complex are considered. Original Russian Text Copyright ? 2008 by V. A. Maksakov, N. V. Pervukhina, N. V. Podberezskaya, M. Yu. Afonin, V. A. Potemkin, and V. P. Kirin __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 49, No. 5, pp. 926–932, September–October, 2008.     

The structurally characterised silyl complexes, Os(κ-S2CNMe2)(SiMeCl2)(CO)(PPh3)2 and Os(κ-S2CNMe2)(SiCl3)(CO)(PPh3)2, which have remarkably unreactive Si-Cl bonds

Treatment of Os(κ²-S₂CNMe₂)H(CO)(PPh₃)₂ with HSiMeCl₂ or HSiCl₃ gives in high yield Os(κ²-S₂CNMe₂)(SiMeCl₂)(CO)(PPh₃)₂ (1) or Os(κ²-S₂CNMe₂)(SiCl₃)(CO)(PPh₃)₂ (2), respectively. The crystal structures of both compounds have been determined and the Os-Si distances are 2.3672(10) Å for 1 and 2.3449(12) Å for 2. In solution, and under forcing conditions, both compounds are extraordinarily unreactive towards hydroxide ions.     

配合物Cu(C15H12N2O3)(C5H5N)的合成和晶体结构

The title coordination compound with N-substituted-salicyl Schiff ligand, Cu(C₁₅H₁₂N₂O₃)(C₅H₅N), has been synthesized. The coordination compound crystallizes in orthorhombic system, space group Pbca with a=2.037 62(7) nm, b=0.698 45(2)nm, c=2.508 76(9)nm, V=3.570 4(2) nm³, Z=8, F(000)=1 688, D_c=1.529 g·cm^-3, M_r=410.91, μ=1.250 mm^-1, R=0.031 3 and wR=0.077 0. In the coordination compound, one phenolate oxygen, one carbonyl oxygen and one hydrazine nitrogen atom from the dianionic ligand N-salicylaldehyde-N′-(4-methoxybenzoyl) hydrazone and one pyridine nitrogen atom coordinate to Cu(Ⅱ) ion, forming a distorted square plane. CCDC: 218182.     

配合物Cu(C14H10N2O2)(C5H5N)的合成和晶体结构

The novel copper(Ⅱ) complex with salicylaldehyde benzoylhydrazone and pyridine ligands， Cu(C₁₄H₁₀N₂O₂)(C₅H₅N)， has been synthesized and characterized by elemental analysis， IR and thermal analysis. The crystal structure of the title complex has been determined by single crystal X-ray diffraction techniques. The crystal belongs to monoclinic with space group P2₁/c. The cell parameters are： a=1.6362(9)nm， b=1.7140(9)nm， c=1.2255(7)nm， β=105.168(9)°， V=3.317(3)nm³， Z=8， D_c=1.525g·cm^-3， μ(MoKα)=1.334mm^-1， F(000)=1560. The structure was refined to final R₁=0.0376， wR₂=0.0909. The copper(Ⅱ) ion lies in a dis-torted square-planar environment composed of two oxygen atoms， one nitrogen atom of tridentate acyhydrazone Schiff base ligand and one nitrogen atom of the pyridine ligand. CCDC： 193111.     

配合物Ni(C14H10N2O3)(C5H5N)的合成和晶体结构

A novel nickel(Ⅱ) complex with 2,4-dihydroxybenzalidene benzoylhydrazone and pyridine ligands, Ni(C₁₄H₁₀N₂O₃)(C₅H₅N), has been synthesized and characterized by elemental analysis and IR. The crystal structure of the title complex has been determined by single crystal X-ray diffraction techniques. The crystal belongs to orthorhombic, space group Pbca. The cell parameters are: a=1.580 20(19) nm, b=1.362 18(16) nm, c=1.616 50(19) nm, and V=3.479 5(7) nm³, Z=8, D_c=1.497 Mg·m^-3, μ(MoKα)=1.139 mm^-1, F(000)=1 616, R=0.032 9 and wR=0.077 0 for 2 772 observed reflections (I>2σ(I)) out of 3810 unique ones. The nickel(Ⅱ) ion lies in a distorted square-planar environment composed of two oxygen atoms, one nitrogen atom of tridentate acyhydrazone schiff base ligand and one nitrogen atom of the pyridine ligand. The analysis of the crystal structure indicates that the complex has a one-dimensional chain structure, which is formed by intermolecular hydrogen bonds. CCDC: 244668.     

Synthesis of homo- and heteronuclear ruthenium-gold clusters with diphosphine and thiolato bridged ligands. Single crystal molecular structure of [Ru3(CO)10(μ-AuPPh3)(μ-SC5H4N)] and [Ru3(CO)8(μ-H)(μ-SC5H4N)(μ-dppe)]

The reaction between [Ru₃(CO)₁₀(NCMe)₂] and [AuClPPh₃] gave compound [Ru₃(CO)₁₀(μ-Cl)(μ-AuPPh₃)] (1) in quantitative yield under very mild conditions. The reaction of 1 with 4-mercaptopyridine (4-pyS) using ultrasonic reaction conditions gave the heteronuclear compound [Ru₃(CO)₁₀(μ-AuPPh₃)(μ-SC₅H₄N)] (2) in moderate yield. There was no spectroscopic evidence that indicates the formation of the hydride isolobal analog in this reaction. The homonuclear cluster [Ru₃(CO)₈(μ-H)(μ-SC₅H₄N)(μ-dppe)] (3) was prepared by a selective reaction employing the ruthenium-diphosphine derivative [Ru₃(CO)₁₀(μ-dppe)] (dppe = 1,2-bis(diphenylphosphine)ethane) with 4-pyS in THF solution. The isolobal analog to compound 3, compound [Ru₃(CO)₈(μ-AuPPh₃)(μ-SC₅H₄N)(μ-dppe)] (4) was synthesized by the reaction between compound 2 and dppe in refluxing dichloromethane. Compounds 1-4 were characterized in solution by spectroscopic methods and the molecular structure of compounds 2 and 3 in the solid state was obtained by single crystal X-ray diffraction studies.     

Syntheses, characterization, and structure determination of nine-coordinate Na[YIII(edta)(H2O)3]· 5H2O and eight-coordinate Na[YIII(cydta)(H2O)2]·5H2O complexes

Syntheses and structure determination of the Y^III complexes with ethylenediaminetetraacetic acid (H₄edta) and trans-1,2-cyclohexanediaminetetraacetic acid (H₄cydta) are reported. The crystal and molecular structures of the complexes, as well as their molecular formulas and compositions, were determined by single-crystal X-ray structure analyses, NMR, IR, thermogravimetric measurements, and elementary analyses. The crystal of the Na[Y^III(edta)(H₂O)₃]·5H₂O complex belongs to the orthorhombic crystal system and space group Fdd2. The crystal data are as follows: a = 19.355(5) Å, b = 35.431(11) Å, c = 12.122(3) Å, V = 8313(4) ų, Z = 16, M = 544.23, D_c = 1.739 g·cm⁻³, μ = 2.908 mm⁻¹ and F(000) = 4480. The final R and Rw are 0.0483 and 0.1172 for 3284 (I > 2σ(I)) unique reflections, R and Rw are 0.0678 and 0.1440 for all 8499 reflections, respectively. The Y^IIIN₂O₇ part in the [Y^III(edta)(H₂O)₃]⁻ complex anion has a pseudo-monocapped square antiprismatic nine-coordinate structure, in which the six coordinated atoms (two N and four O) from the edta ligand and three water molecules are coordinated to the central Y^III ion directly. The crystal of the Na[Y^III(cydta)(H₂O)₂]·5H₂O complex belongs to the triclinic crystal system and space group. The crystal data are as follows: a = 8.405(2) Å, b = 9.970(2) Å, c = 14.763(4) Å, α = 88.538(4)°, β = 76.193(4)°, γ = 88.100(4)°, V = 1200.6(5) Å ³, Z = 2, M = 580.31, D_c = 1.605 g·cm⁻³, μ = 2.519 mm⁻¹ and F(000) = 600. The final R and Rw are 0.0381 and 0.0911 for 4198 (I > 2σ(I)) unique reflections, R and Rw are 0.0530 and 0.1041 for all 6186 reflections, respectively. The Y^IIIN₂O₆ part in the [Y^III(cydta)(H₂O)₂]⁻ complex anion has a pseudo square antiprismatic eight-coordinate structure in which the six coordinated atoms (two N and four O) from the cydta ligand and two water molecules are coordinated to the central YIII ion directly. Original Russian Text Copyright ? 2005 by J. Wang, Y. Wang, Zh. H. Zhang, X. D. Zhang, J. Tong, X. Zh. Liu, X. Y. Liu, Y. Zhang, and Zh. J. Pan __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 46, No. 5, pp. 928–938, September–October, 2005.     

Syntheses and characterization of η-cyclopentadienyl and η-indenyl ruthenium(II) complexes of arylazoimidazoles: The molecular structure of the complex [(η-C5H5)Ru(PPh3)(C6H5-NN-C3H3N2)]

The complex [(η⁵-C₅H₅)Ru(PPh₃)₂Cl] (1) reacts with several arylazoimidazole (RaaiR′) ligands, viz., 2-(phenylazo)imidazole (Phai-H), 1-methyl-2-(phenylazo)imidazole (Phai-Me), 1-ethyl-2-(phenylazo)imidazole (Phai-Et), 2-(tolylazo)imidazole (Tai-H), 1-methyl-2-(tolylazo)imidazole (Tai-Me) and 1-ethyl-2-(tolylazo)imidazole (Tai-Et), gave complexes of the type [(η⁵-C₅H₅)Ru(PPh₃)(RaaiR′)]⁺ {where R, R′ = H (2), R = H, R′ = CH₃ (3), R = H, R′ = C₂H₅ (4), R = CH₃, R′ = H (5), R, R′ = CH₃ (6), R = CH₃, R′ = C₂H₅ (7)}. The complex [(η⁵-C₉H₇)Ru(PPh₃)₂(CH₃CN)]⁺ (8) undergoes reactions with a series of N,N-donor azo ligands in methanol yielding complexes of the type [(η⁵-C₉H₇) Ru(PPh₃)(RaaiR′)]⁺ {where R, R′ = H (9), R = H, R′ = CH₃ (10), R = CH₃, R′ = H (11), R = CH₃, R′ = C₂H₅ (12)}, respectively. These complexes were characterized by FT IR and FT NMR spectroscopy as well as by analytical data. The molecular structure of the complex [(η⁵-C₅H₅)Ru(PPh₃)(C₆H₅-NN-C₃H₃N₂)]⁺ (2) was established by single crystal X-ray diffraction study.     

茂金属配合物[Mo(eta5-C5H4Si2Me5)(CO)3Cl]的晶体结构和量子化学研究

The crystal structure of tricarbonylpentamethyldisilanylcyclopentadienyl chloro-molybdenum complex [Mo(eta⁵-C₅H₄Si₂Me₅)(CO)₃Cl] has been determined by X-ray diffraction method.A quantum chemistry calculation by means of G98W package and taking LanL2DZ basis set.The crystal belongs to orthorhombic space group Pbca with a=1.5812(5), b=1.7307(3), c=1.3339(2)nm,V=3.650(1)nm³, Z=8, D_c=1.495 g·cm^-3, μ(MoKα)= 9.97cm^-1,F(000)=1664,final R=0.027 for 2590 unique reflection [I >3σ(I)]. The bond lengths of Mo-Cl and is 0.250nm,and Mo-CO is 0.198～0.202nm. The Mo atom has a distorted tetrahedral cone geometry.     

Palladium (II) complexes with mono-oxide 1,1′-bis(diphenylphosphino)metallocene ligands [Fe(η-C5Me4PPh2)(η-C5Me4P{O}Ph2)] and [Os(η-C5H4PPh2)(η-C5H4P{O}Ph2)]

The monoxides [Fe(η⁵-C₅Me₄PPh₂)(η⁵-C₅Me₄P{O}Ph₂)] (1) and [Os(η⁵-C₅H₄PPh₂)(η⁵-C₅H₄P{O}Ph₂)] (2) have been prepared by treatment of the corresponding diphosphines with CCl₄ and methanol.These ligands react with [Pd(PhCN)₂Cl₂] to give dichloride complexes of different structure.The dimeric complex [{Os(η⁵-C₅H₄PPh₂)(η⁵-C₅H₄P{O}Ph₂)}PdCl(μ-Cl)]₂ (4) contains the monodentate P-coordinated osmocene ligand with the free P{O}Ph₂ group, while the octamethylferrocene ligand gives the chelate k²-P,O complex [{Fe(η⁵-C₅Me₄PPh₂)(η⁵-C₅Me₄P{O}Ph₂)}PdCl₂] (3).The structures of 3 and 4 have been determined crystallographically.Treatment of 3 and 4 with silver salts in CH₂Cl₂ or acetonitrile leads to the corresponding dicationic complexes[{M(η⁵-C₅R₄PPh₂)(η⁵-C₅R₄P{O}Ph₂)}Pd(MeCN)_x]²⁺ (5, M = Fe, R = Me; 6, M = Os, R = H). Complex 5 decomposes upon isolation, in contrast 6 is rather stable, probably due to Os-Pd bonding. The dichlorides 3 and 4 catalyze catalytic amination of p-bromotoluene with N-(4-tolyl)morpholine with lower activity than (dppf)PdCl₂, however they perform comparable to (dppf)PdCl₂ activity in coupling of p-bromotoluene with p-methoxyphenyl boronic acid.     

Synthesis, crystal structure and properties of [Nd(C6NO2H5)3(H2O)2]2n · (nH5O2)(nHgCl5)(2nHgCl4) · (nH2O) with unprecedented polycationic chains

A novel inorganic-organic hybrid complex, [Nd [Nd (C₆NO₂H₅)₃(H₂O)₂]_2n · (nH₅O₂)(nHgCl₅)(2nHgCl₄) · (nH₂O)(1), was obtained by hydrothermal reactions and structurally characterized by X-ray diffraction. The unit cell parameters are as follows: a = 9.579(1), b = 21.462(2), c = 15.801(1) ?, β = 102.339(6)^ℴ, V = 3173.5(5) ?³, Z = 4, space group P2₁/c. The crystal structure analysis reveals that the title complex is characteristic of a novel polycationic [Nd(C₆NO₂H₅)₃(H₂O)₂]_2n ⁶ⁿ⁺ one-dimensional chain-like structure. Photoluminescent investigation shows that the title complex displays strong emission in blue region, which is attributed to the intraligand π-π*-transition of nicotinic ligands. Optical absorption spectra of 1 reveal the presence of an optical gap of 3.45 eV. The article is published in the original.     

Synthesis, characterization and properties of β-octamolybdate-supported transition metal complexes with mixed ligands: [Cu(2,2′-bipy)(C6H5NO2)(H2O)]2[Mo8O26]·5H2O

A novel organic–inorganic hybrid compound [Cu(2,2′-bipy)(C₆H₅NO₂)(H₂O)]₂[Mo₈O₂₆]·5H₂O (1), (2,2′-bipy = 2,2′-bipyridine; C₆H₅NO₂ = pyridine-4-carboxylic acid) has been prepared and characterized by elemental analyses, IR spectrum, thermal stability analysis, and single-crystal X-ray diffraction. Compound 1 is a discrete cluster, constructed from β-[Mo₈O₂₆]⁴⁻ subunits covalently bonded to two [Cu(2,2′- bipy)(C₆H₅NO₂)(H₂O)]₂⁴⁺ coordination cations via terminal oxo groups that connect one molybdenum site. A 3D supramolecular network is further formed by extensive hydrogen bonding interactions and π–π interactions of the 2,2′-bipy and pyridine-4-carboxylic acid ligands. EPR and magnetic susceptibility studies have been used to elucidate the electronic properties of the Cu²⁺ centres, and the results are in good agreement with the structural features of the compound.     

Protonation of the lithio derivatives of the 1,2,4-tri-phosphaferrocenes, [LiFe(η-P2C2Bu2PBu)(η-C5R5)] (R = H, Me): Crystal and molecular structure of [Fe(η-P3C2Bu2BuH)(η-C5Me5)]

A new synthetic route is described to generate the 4-centre-5 electron donor ring system (P₃C₂^tBu₂BuH), via protonation of the lithium salts [LiFe(η⁴-P₂C₂^tBu₂PBu)(η⁵-C₅R₅)] (R = H, Me). The molecular structure of [Fe(η⁴-P₃C₂^tBu₂BuH)(η⁵-C₅R₅)] (R = Me) has been determined by a single crystal X-ray study.     

Synthesis and crystal structures of [UO2(C6H4NO2)2(C6H5NO2)] and [UO2SO4(C6H5NO2)(H2O)] · H2O

The complexes [UO₂(C₆H₄NO₂)₂(C₆H₅NO₂) (I) and [UO₂SO₄(C₆H₅NO₂)(H₂O)] · H₂O (II) were synthesized and studied by X-ray diffraction analysis. Crystals I are monoclinic: a = 7.0081(3), b = 14.9624(7), c = 9.1837(5) ?, β = 96.594(2)°, Z = 2, space group P2₁/m. Crystals II are triclinic: a = 6.8097(6), b = 9.3837(8), c = 10.4556(10) ?, α = 85.279(3), β = 75.434(3), γ = 69.180(3)°, Z = 2, space group . The main structural unit of crystal I is a mononuclear fragment, which belongs to the crystal chemical group AB ₂ ⁰¹ M¹ (A = UO ₂ ²⁺ , B⁰¹ are ions of pyridine-2-carboxylic (picolinic) acid, M¹ are molecules of picolinic acid) of the uranyl complexes. The main structural unit of crystal II is a chain, which belongs to the crystal chemical group AT³M ₂ ¹ (where T³-SO ₄ ²⁻ , M¹ are water and picolinic acid molecules) of the uranyl complexes. Picolinic acid in complexes I, II was found to have a zwitterion structure. Original Russian Text ? E.V. Grechishnikova, E.V. Peresypkina, A.V. Virovets, Yu.N. Mikhailov, L.B. Serezhkina, 2007, published in Koordinatsionnaya Khimiya, 2007, Vol. 33, No. 6, pp. 468–475.     

New ferrocenylmethylphosphines - Preparation, characterisation and coordination chemistry of PH(CH2Fc)2, P(CH2Fc)3 [Fc = Fe(η-C5H5)(η-C5H4)] and their derivatives

The new ferrocenylmethylphosphines PH(CH₂Fc)₂ (1) [Fc = Fe(η⁵-C₅H₅)(η⁵-C₅H₄)] and P(CH₂Fc)₃ (2) and the phosphonium salt [P(CH₂Fc)₃(CH₂OH)]I (3) were synthesised from P(CH₂OH)₃ and [FcCH₂NMe₃]I. [P(CH₂Fc)(CH₂OH)₃]Cl (4) was obtained from P(CH₂Fc)(CH₂OH)₂, CH₂O and HCl. The new phosphines and phosphonium salts were fully characterised by NMR and IR spectroscopy and MS. [Mo(CO)₆] reacts with 1 to give [Mo(CO)₅{PH(CH₂Fc)₂}] (5) in high yield, but attempts to employ 2 as a ligand failed. The reaction of [P(CH₂Fc)₃(CH₂OH)]I (3) and [PH(CH₂Fc)₃]I (obtained in situ from 3 and Na₂S₂O₅) with [WI₂(CO)₃(NCMe)₂] gave the complex salts [P(CH₂Fc)₃(CH₂OH)][WI₃(CO)₄] (6) and [PH(CH₂Fc)₃][WI₃(CO)₄] (7), respectively. [P(CH₂Fc)₄]I (8) was synthesized from PH₂CH₂Fc and [FcCH₂NMe₃]I. Crystal structures were obtained for 1, 3-8.     

Large bite bisphosphite, 2,6-C5H3N{CH2OP(-OC10H6)(μ-S)(C10H6O-)}2: Synthesis, derivatization, transition metal chemistry and application towards hydrogenation of olefins

Large bite bisphosphite ligand, 2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂ (2), is obtained by reacting chlorophosphite, {-OC₁₀H₆(μ-S)C₁₀H₆O-}PCl (1) with 2,6-pyridinedimethanol in presence of triethylamine.Treatment of 2 with aqueous solution of H₂O₂ or elemental sulfur resulted in the formation of bis(oxide) or bis(sulfide) derivatives, 2,6-C₅H₃N{CH₂OP(E)(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂ (3, E = O; 4, E = S) in quantitative yield.The 10-membered cationic chelate complex, [RuCl(η⁶-C₁₀H₁₄)η²-2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂-κP,κP]Cl (5) is produced in the reaction between [Ru(p-cymene)(μ-Cl)(Cl)]₂ and bisphosphite 2, whereas the neutral chelate complex, cis-[Rh(CO)Cl{2,6-C₅H₃N{CH₂OP(-OC₁₀H₆(μ-S)C₁₀H₆O-)}₂}-κP,κP] (6) is isolated in the reaction of 2 with 0.5 equiv.of [Rh(CO)₂Cl]₂.Compound 2 on treatment with M(COD)Cl₂ (M = Pd, Pt) produce the chelate complexes, [MCl₂{η²-2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂}-κP,κP] (7, M = Pd;10, M = Pt).Similarly the reaction of bisphosphite 2 with Pd(COD)MeCl affords cis-[PdMe(Cl)η²-2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂-κP,κP] (8).Treatment of 2 with [Pd(η³- C₃H₅)Cl]₂ in the presence of AgClO₄ furnish the cationic complex, [Pd(η³-C₃H₅)η²-2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂-κP,κP]ClO₄ (9). The binuclear complex, [Au₂Cl₂{2,6-C₅H₃N{CH₂OP(-OC₁₀H₆)(μ-S)(C₁₀H₆O-)}₂}-κP,κP] (11) is obtained in the reaction of compound 2 with two equiv. of AuCl(SMe₂), where the ligand exhibits bridged bidentate mode of coordination. All the complexes are characterized by the ¹H NMR, ³¹P NMR, elemental analysis and mass spectroscopy data. The cationic ruthenium complex 5 is proved to be an active catalyst for the hydrogenation of styrene and α-methyl styrene.     

Mono- and binuclear bipyridyl derivatives of the Mo(η-C3H5)(CO)2 fragment: structural studies and fluxionality in solution

New mono- and binuclear complexes of the Mo(η³-C₃H₅)(CO)₂ fragment, containing bipyridyl ligands (2,2′-bpy, 4,4′-Me₂-2,2′-bpy) as chelates, and mono- (4-CNpy, 4-Mepy, NCMe, Br) or bidentate nitrogen ligands (4,4′-bpy, bipyridylethylene, pyrazine) as terminal or bridging ligands, respectively, were prepared. The binuclear complex [{Mo(η³-C₃H₅)(CO)₂(2,2′-bpy)}₂(μ-4,4′-bpy)][PF₆]₂ (2) was shown by X-ray diffraction to assemble in the crystal forming large channels with a rectangular section. A longer bridge, such as bipyridylethylene, led to a different structure (3). 4-CNpy behaved as monodentate ligand (4), coordinating through the pyridine nitrogen as a terminal ligand. NMR spectroscopy studies showed that the complexes exhibited a fluxional behavior in solution, the endo and exo forms of the more symmetrical equatorial isomers being usually present and interconverting in solution. The solid state structures of the complexes revealed a preference for the more symmetrical equatorial isomer, with the two chelate ligands in trans positions in the binuclear species. The rings tended to become parallel in the organized crystal.     

含氮宾或卡宾的金属羰基簇合物的结构化学研究——Ⅰ.H2Fe3(N-C6H5)(CO)9和Fe3(N-C6H5)(μ3-CO)(CO)9的合成和结构

含氮宾的两个三核羰基铁簇合物是由[Et₃NH][HFe₃(CO)₁₁]与C₆H₅NCO在苯中反应获得.应用四园衍射仪测定了H₂Fe₃(N-C₆H₅)(CO)₉(Ⅰ)和Fe₃(N-C₆H₅)(μ₃-CO)(CO)₉(Ⅱ)的晶体结构.晶体数据为:C₁₅H₇NO₉Fe₃(Ⅰ),空间群P2₁/a,a=18.343(2),b=9.072(1),c=11.451(1)Å,β=102.03(1)°,V=1863.7ų,Z=4,D_c=2.143g/cm³;C₁₆H₅NO₁₀Fe₃(Ⅱ),空间群P2₁/c,a=8.634(1),b=13.026(1),c=17.642(2)Å,β=97.68(1)°,V=1966.3ų,Z=4,D_c=1.820g/cm结构系用直接法解出,最后R_Ⅰ因子为0.033,R_Ⅱ因子为0.027.测定结果表明,(Ⅰ)和(Ⅱ)分子均具有C_s对称性,且三个Fe原子共面,呈近似等边三角形结构.(Ⅰ)中面桥N原子以不对称方式与三个Fe原子成键;(Ⅱ)中面桥羰基以不对称方式与三个Fe原子键连.Fe-N和Fe-C键长分别在1.896-1.938Å和2.006-2.110Å之间.