One-and two-dimensional silver-tetramethylpyrazine coordination polymers with uncoordinated anions: Synthesis and structure of [Ag(Me4Pyz)]PF6 and [Ag2(Me4Pyz)3](BF4)2·H2O

Coordination polymers [Ag(Me₄Pyz)] PF₆(I) and [Ag₂(Me₄Pyz)₃](BF₄)₂·H₂O (II) have been synthesized, and their structures have been determined. The crystals of I are monoclinic, space group C2/c, a = 9.440(2) ?, b = 10.587(2) ?, c = 13.165(3) ?, β= 107.19(3)°, V = 1257.0(5) ?³, d = 2.056 g/cm³, Z = 4. The crystals of II are monoclinic, space group P2₁/n, a = 13.062(3) ?, b = 12.259(2) ?, c = 18.996(4) ?, β = 97.73(3)°, V = 3014.1(11)?³, ρ = 1.798 g/cm³, Z = 4. The structure of I is built of linear polymeric cations [Ag(C₈H₁₂N₂)] _∞ ⁺ and octahedral anions [PF₆]⁻. Upon the interaction of tetramethylpyrazine molecule with Ag⁺ ions, intersecting polymeric chains [Ag(C₈H₁₂)] _∞ ⁺ (1D polymer) are formed extending in mutually perpendicular diagonal directions. The structure of II consists of layers (2D polymers) formed by fused sixmembered rings. These rings consist of Ag⁺ ions linked by bridging ligands Me₄Pyz. Original Russian Text ? Yu.V. Kokunov, Yu.E. Gorbunova, 2007, published in Zhurnal Neorganicheskoi Khimii, 2007, Vol. 52, No. 5, pp. 743–750.     

Crystal and molecular structure of (NH4)2[UO2(NO3)4] and [(NH4)(18C6)]2[UO2(NO3)4]

Single crystals of diammonium tetranitratouranylate (NH₄)₂[UO₂(NO₃)₄] (I) and a new diammonium tetranitratouranylate complex with 18-crown-6 [(NH₄)(18C6)]₂[UO₂(NO₃)₄] (II) have been synthesized by the reaction of diaquadinitratouranyl tetrahydrate with ammonium nitrate in a nitric acid solution and the reaction of the same reagents with 18C6 in an ethanol solution, respectively. The X-ray diffraction analysis of compounds I and II has been performed. Crystals of compounds I and II are monoclinic, Z = 2, space group P2₁/n, a = 6.4075(5) ?, b = 7.7851(7) ?, c = 12.4461(12) ?, β = 101.239(1)°, V = 608. 94(9) ?³ for compound I and a = 10.542(9) ?, b = 8.590(8) ?, c = 22.5019(19) ?, β = 101.632(1)°, V = 2058.3(3) ?³ for compound II. The [UO₂(NO₃)₄]²⁻ complex anion in compounds I and II contains two monodentate and two bidentate cyclic nitrato groups, and the coordination number of uranyl is 6. The 18C6 molecule in the structure of compound II has the classic crown conformation and combined with the ammonium ion by three hydrogen bonds. Compounds I and II formed by electrostatic attraction forces between counterions are stabilized by (NH₄⁺)NH...O(NO₃⁻) interionic hydrogen bonds.     

Synthesis and structural characterization of 2-pyrazinecarboxylate zinc compound {[Zn2(Pyz)2(H2O)4] · SO4}n (Pyz = 2-pyrazinic acid)

A solvothermal reaction of 2-pyrazinic acid with Zn(SO₄)₂ · 7H₂O yielded the title complex of the formula {[Zn₂(Pyz)₂(H₂O)₄] · SO₄} _n (I). X-ray diffraction study shows that the complex I crystallizes in mono-clinic system, space group P2₁/c, with lattice parameters a = 11.2687(6), b = 7.3511(4), c = 11.8506(7) ?, β = 95.070(2)°, V = 977.83(9) ?³, Z = 4, and ρ_calcd = 2.184 mg m⁻³.     

Structure and properties of double complex salts [Co(NH3)6][Fe(CN)6] and [Co(NH3)6]2[Cu(C2O4)2]3

Double complex salts (DCSs) [Co(NH₃)₆][Fe(CN)₆] (I) and [Co(NH₃)₆]₂[Cu(C₂O₄)₂]₃ (II) and complex [Co(NH₃)₆]₂(C₂O₄)₃·4H₂O (III) are synthesized and investigated by single crystal XRD, crystal optics, and elemental analysis. The crystalline phases of I, II, and III (R-3, P2₁/c, and Pnnm space groups respectively) have the following crystallographic characteristics: a = 10.9804(2) ?, b = 10.9804(2) ?, c = 10.8224(3) ?, V = 1130.03(4) ?³, Z = 3, d _x = 1.65 g/cm³ (I); a = 9.6370(2) ?, b = 10.2452(2) ?, c = 13.2108(3) ?, V = 1932.90(9) ?³, Z = 2, d _x= 1.97 g/cm³ (II), and a = 11.7658(3) ?, b = 11.7254(3) ?, c = 14.1913(4) ?, V = 1304.34(5) ?³, Z = 2, d _x = 1.68 g/cm³ (III). This paper investigates the products of DCS thermolysis in a hydrogen atmosphere: the intermetallic compound CoFe with the bcc parameter a = 2.852 ? for I and a heterogeneous mixture of Co and Cu in the decomposition of II. The coordinated CN⁻ and C₂O₄²⁻ groups then turn into NH₃, hydrocarbons, and CO₂. The dominant hydrocarbon is methane.     

Structure of uranyl complexes with acetylenedicarboxylic acid, K(H5O2)[UO2(OOCC≡CCOO)2 · H2O] · 2H2O and Cs2[UO2(OOCC≡CCOO)2 · H2O] · 2H2O

Uranyl complexes with acetylenedicarboxylic acid, K(H₅O₂)[UO₂L₂H₂O] · 2H₂O (I) and Cs₂[UO₂L₂H₂O] · 2H₂O (II), L²⁻ = C₄O ₄ ²⁻ were prepared for the first time. The composition and structure of the complexes were determined by X-ray diffraction. The crystal data are as follows: a = 16.254(12) ?, b = 13.508(8) ?, c = 7.683(6) ?, β = 90.91(7)°, space group C2/c, V = 1687(2) ?³ (I); a = 7.0745(10), b = 18.4246(10), c = 13.1383(10) ?, space group Abm2, V = 1712.5(3) ?³ (II). The structures of I and II are based on [UO₂L₂H₂O] _n ²⁻ anionic chains stretched along the [101] direction (I) or [010] direction (II). In I and II, the uranium coordination polyhedron is a pentagonal bipyramid in which the equatorial environment of the uranyl ions is formed by the oxygen atoms of the four L²⁻ anions and the water molecule. The L²⁻ anions in I and II are bidentate bridging ligands connecting two uranium atoms that are next to each other in the anionic chain; their coordination capacity is equal to 2. In I, the K⁺ and H₅O ₂ ⁺ cations are outer-sphere species. The latter form hydrogen bonds combining the anionic chains shifted by translation b with respect to each other. The [UO₂L₂H₂O] _n ²⁻ chains in I are surrounded by the potassium and oxonium cations; in II, these are combined by hydrogen bonds into anionic layers between which Cs⁺ cations are arranged. The IR spectrum of compound II was measured and interpreted. Original Russian Text ? I.A. Charushnikova, A.M. Fedoseev, N.A. Budantseva, I.N. Polyakova, Ph. Moisy, 2007, published in Koordinatsionnaya Khimiya, 2007, Vol. 33, No. 1, pp. 63–69.     

X-ray powder diffraction features of manganites DyM 3I M 3II Mn4O12 (MI = Li, Na, K; MII = Mg, Ba)

Manganites DyM₃^IMg₃Mn₄O₁₂ and DyM₃^IBa₃Mn₄O₁₂ (M^I = Li, Na, K) were synthesized by the solid-state reaction of dysprosium and manganese(III) oxides and magnesium and corresponding alkali metal carbonates. The X-ray powder diffraction studies showed that the crystals are orthozhombic with the following unit cell parameters and densities: DyLi₃Mg₃Mn₄O₁₂—a = 10.88 ?, b = 10.73 ?, c = 19.63 ?, V ⁰ = 1656.2 ?³, Z = 8, ρ_calc = 5.36 g/cm³, ρ_pycn = 5.11 ± 0.05 g/cm³; DyNaMg₃Mn₄O₁₂—a = 10.55 ?, b = 10.72 ?, c = 18.28 ?, V ⁰ = 2067.4 ?³, Z = 8, ρ_calc = 4.60 g/cm³, ρ_pycn = 4.88 ± 0.09 g/cm³; DyK₃Mg₃Mn₄O₁₂—a = 10.56 ?, b = 10.72 ?, c = 20.89 ?, V ⁰ = 2206.0 ?³, Z = 8, ρ_calc = 4.60 g/cm³, ρ_pycn = 4.92 ± 0.06 g/cm³; DyLi₃Ba₃Mn₄O₁₂—a = 10.53 ?, b = 10.69 ?, c = 21.28 ?, V ⁰ = 2395.4 ?³, Z = 8, ρ_calc = 5.58 g/cm³, ρ_pycn = 5.98 ± 0.12 g/cm³; DyNa₃Ba₃Mn₄O₁₂—a = 10.53 ?, b = 10.74 ?, c = 23.00 ?, V ⁰ = 2602.3 ?³, Z = 8, ρ_calc = 5.39 g/cm³, ρ_pycn = 5.30 ± 0.07 g/cm³; DyK₃Ba₃Mn₄O₁₂—a = 10.52 ?, b = 10.75 ?, c = 25.69 ?, V ⁰ = 2905.2 ?³, Z = 8, ρ_calc = 5.04 g/cm³, ρ_pycn = 5.00 ± 0.18 g/cm³.     

Crystal and molecular structure and properties of [Ni(4-NH2Py)2(iso-Bu2PS2)2] and [Co(4-NH2Py)(iso-Bu2PS2)2]

The interaction of the Co(iso-Bu₂PS₂)₂ chelate with 4-NH₂Py afforded a paramagnetic complex [Co(4-NH₂Py)(iso-Bu₂PS₂)₂] (μ_eff = 4.53 BM). Single crystals of [Ni(4-NH₂Py)₂(iso-Bu₂PS₂)₂] (I) and [Co(4-NH₂Py)(iso-Bu₂PS₂)₂] (II) were grown and used for X-ray diffraction investigation (X8 APEX diffractometer, MoK _α radiation). Crystals I are monoclinic with unit cell parameters a = 12.5336(5) Å, b = 9.4356(4) Å, c = 16.4095(6) Å; β = 111.351(1)°; V = 1807.4(1) ų; Z = 2, ρ = 1.223 g/cm³, space group P2₁/n. Crystals II are triclinic with unit cell parameters a = 8.7572(4) Å, b = 9.6934(6) Å, c = 18.665(1) Å; α = 79.374(2)°, β = 87.049(2)°, γ = 75.640(2)°; V = 1508.6(1) ų; Z = 2, ρ = 1.259 g/cm³; space group . The structures of I and II are formed by isolated mononuclear molecules. The coordination unit is NiN₂S₄ (octahedron) in I and CoNS₄ (tetragonal pyramid) in II. The 4-NH₂Py molecule is coordinated through the N atom of the heterocycle. Electronic spectroscopy data for II agree with the symmetry of the NS₄ polyhedron found by X-ray diffraction (XRD) analysis. The noncoordinated amine groups link the complex molecules via N-H...S hydrogen bonds. __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 46, No. 6, pp.1072–1080, November–December, 2005. Original Russian Text Copyright ? 2005 by T. E. Kokina, L. A. Glinskaya, E. A. Sankova, R. F. Klevtsova, and S. V. Larionov     

Synthesis and X-ray diffraction study of R[UO2(CH3COO)3] (R = H3O+ or NH(C2H5) 3+ )

Single crystals of (H₃O)[UO₂(CH₃COO)₃] (I) and (NH(C₂H₅)₃)[UO₂(CH₃COO)₃] (II) are synthesized, and their structures are studied by X-ray crystallography. Compound I crystallizes in the tetragonal crystal system with the unit cell parameters a = 13.70640(10) ?, c = 27.5258(5) ?, V = 5171.14(11) ?³, space group I4₁/a, Z = 16, R = 0.0238. The crystals of compound II are orthorhombic with the parameters a = 13.3685(3) ?, b = 10.6990(3) ?, c = 12.2616(3) ?, V = 1753.77(8) ?³, space group Pna2₁, Z = 4, R = 0.0228. The uranium-containing structural units of crystals I and II are [UO₂(CH₃COO)₃]⁻ island mononuclear groups belonging to the A B₃⁰¹(A = UO₂²⁺, B⁰¹ = CH₃COO⁻) crystal-chemical group of uranyl complexes. [UO₂(CH₃COO)₃]⁻ complexes are linked into a three-dimensional framework by electrostatic interactions with the outer-sphere cations and by hydrogen bonds involving the hydrogen atoms of hydroxonium (I) or triethylammonium (II) with the oxygen atoms of the acetato groups.     

Crystal and molecular structures of the Rh[(C2H5O)2PS2]3 and Co[(C6H5O)2PS2]3 chelate compounds

The crystal structures of the Rh[(EtO)₂PS₂]₃ (I) and Co[(PhO)₂PS₂]₃ (II) chelate compounds were determined from X-ray diffraction (XRD) data (CAD-4 diffractometer, MoK _β radiation, 1193 F _hkl , R = 0.0516 for I and 513 F _hkl , R = 0.0305 for II). Crystals I are monoclinic: a = 14.233(3) Å, b = 13.570(3) Å, c = 14.272(3) Å; β = 90.66(3)°, V = 2756.3(10) ų, Z = 4, ρ_calc = 1.587 g/cm³, space group C2/c. Crystals II are trigonal: a = 15.149(2) Å, c = 30.306(6) Å; V = 6023.2(16) ų, Z = 6, ρ_calc = 1.493 g/cm³, space group R3ˉ. Structures I and II consist of discrete mononuclear molecules. The coordination polyhedra of the M atoms (M = Rh, Co) are distorted octahedra formed by six sulfur atoms of three cyclic bidentate (RO)₂ PS₂⁻ ligands. Original Russian Text Copyright ? 2008 by R. F. Klevtsova, L. A. Glinskaya, and S. V. Larionov __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 49, No. 2, pp. 330–334, March–April, 2008.     

Crystal structure of cadmium iodide complexes with acetamide and propaneamide [Cd(CH3CONH2)6][Cd2I6] and [Cd(C2H5CONH2)6][Cd2I6]

The complexes of CdI₂ with acetamide (AA) and propaneamide (PrA) of the composition [Cd(AA)₆][Cd₂I₆] (I) and [Cd(PrA)₆][Cd₂I₆] (II) were synthesized and studied by X-ray diffraction. Isostructural crystals I and II are triclinic: a = 7.285(3) and 8.066(6), b = 11.266(4) and 11.649(3), c = 11.554(3) and 12.063(2) ?, α = 100.96(2)° and 102.74(2)°, β = 91.59(2)° and 91.73(4)°, γ = 100.76(3)° and 101.05(4)°, V = 912.5 and 1081.9 ?³, respectively; space group , Z = 1. Original Russian Text ? I.A. Zamilatskov, E.V. Savinkina, D.V. Al’bov, 2007, published in Koordinatsionnaya Khimiya, 2007, Vol. 33, No. 6, pp. 407–410.     

Crystal structure of [Mn(1,10-C12H8N2)3](B6H7)2

A new compound [MN^II(Phen)₃]²⁺(B₆H₇)₂⁻ is synthesized; its crystal structure is studied by XRD at 100 K. Crystallographic data: C₃₆H₃₈B₁₂N₆Mn, M = 739.39, triclinic symmetry, space group P , unit cell parameters: a = 10.3131(3) ?, b = 13.4839(4) ?, c = 15.1132(4) ?; α = 97.696(1)°, β = 108.324(1)°, γ = 102.211(1)°; V = 1903.9(1) ?³, Z = 2, d _calc = 1.290 g/cm³. The structure is solved by direct and Fourier methods and refined by full-matrix LSM in the anisotropic (isotropic for hydrogen atoms) approximation to the final factor R ₁ = 0.036 for 10169 I _hkl ≥ 2σ _I (Bruker-Nonius X8 APEX CCD diffractometer, λMoK _α). The structure contains two crystallographically different anions. Original Russian Text Copyright ? 2009 by T. M. Polyanskaya, M. K. Drozdova, V. V. Volkov, and K. G. Myakishev __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 50, No. 2, pp. 381–385, March–April, 2009.     

Crystal structure of the reaction product of copper(II) nitrate with α-(3,3-Dimethyl-3,4-dihydro-1-isoquinolyl)hydroxy-iminoacetonitrile [Cu3(μ3-OH)(μ-L)3(NO3)2(H2O)] · 2H2O

The coordination compound [Cu₃(μ₃-OH)(μ-L)₃(NO₃)₂(H₂O)] · 2H₂O (I), where L is the α-(3,3-dimethyl-3,4-dihydro-1-isoquinolyl)hydroxyiminoacetonitrile anion, has been synthesized. The crystal and molecular structure of I was determined by X-ray diffraction (Enraf-Nonius CAD4, MoK _α radiation, graphite monochromator, ω-scan mode, 2θ_max = 49.96°, 7673 unique reflections, a = 12.745(3) ?, b = 13.726(3) ?, c = 28.835(6) ?, β = 93.44(3)°, V = 5035.2(17) ?³, Z = 4, space group P2₁/c). In the trimer complex I, the copper atoms are combined by a bridging hydroxy group. The copper atoms are additionally linked pairswise by three tridentate chelating bridging organic anions coordinated to the Cu(II) atoms by the N and O atoms of the deprotonated oxime group and by the N atom of the dihydroisoquinoline moiety. Original Russian Text ? V.I. Sokol, V.V. Davydov, N. Yu. Merkur’eva, E.I. Polyakova, Yu.V. Shklyaev, V.S. Sergienko, 2007, published in Zhurnal Neorganicheskoi Khimii, 2007, Vol. 52, No. 10, pp. 1643–1652.     

Crystal and molecular structure of the [Y(Phen){( i -C4H9)2PS2}2NO3] mixed-ligand compound

The [Y(Phen){(i-C₄H₉)₂PS₂}₂NO₃] mixed-ligand compound (I) was synthesized. Its structure was determined by X-ray diffraction analysis (X8 APEX diffractometer, λMoK _α , 3788 F _hkl , R = 0.0677). Crystals I are orthorhombic: a = 10.6495(8) Å, b = 20.006(2) Å, c = 35.317(4) Å, V = 7524.4(13) ų, Z = 8, ρ_calc = 1.324 g/cm³, space group Pbca. The structure is built of mononuclear discrete molecules. The N₂O₂S₄ coordination polyhedron of the Y atom is a distorted dodecahedron. Original Russian Text Copyright ? 2008 by V. L. Varand, L. A. Glinskaya, R. F. Klevtsova, and S. V. Larionov __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 49, No. 1, pp. 182–186, January–February, 2008.     

Crystal structure of ansa-Me2Si-(2Me-4-p-Tol-cyclopenta[b]indol-3-yl)2ZrCl2 and its catalytic properties in the polymerization of propylene

A new zirconocene ansa-Me₂Si-(2Me-4-p-Tol-cyclopenta[b]indol-3-yl)₂ZrCl₂ complex (I), in which the Cp ligand is fused with the indole ring, has been synthesized and studied by X-ray diffraction analysis. Light brown crystals are triclinic, space group P [`1]\bar 1; M = 734.92, a = 9.252(2) ?, b = 12.914(3) ?, c = 15.619(3) ?, α = 111.83(3)°, β = 81.03(3)°, γ = 117.77(3)°, V = 1569(3) ?³, Z = 2, ρ_calc = 1.525 g/cm³. The structural parameters of complex I are compared with the known bis-indenyl zirconium complexes: rac-Me₂Si(Ind)₂ZrCl₂ (II) and rac-Me₂Si(2Me-2Ph-1-Ind)₂ZrCl₂ (III) and analogous substituted rac-Me₂Si(2,5-Me₂-3Ph-6-Cp[b]Tp)₂ZrCl₂ (IV) and rac-Me₂Si(2,5-Me₂-1Ph-4-Cp[b]Py)₂ZrCl₂ (V). Complex I alkylated by the Grignard reagent (MgMe₂) in the presence of the Al-iso-Bu₃ cocatalyst is an efficient catalyst for the polymerization of propylene into isotactic polypropylene.     

Heterometallic clusters with the {MoNbI8} core: The synthesis and crystal structures of (Ph4P)2[Mo5NbI8Cl6] and (4-MePyH)5[Mo5NbI8Cl6]Cl2

Heterometallic chloride complexes [Mo₅NbI₈Cl₆] ⁿ⁻ (n = 2, 3) are synthesized. The crystal structures of their salts are determined: for (Ph₄P)₂[Mo₅NbI₈Cl₆] (I), triclinic crystal system, spacegroup P [`1]\bar 1, a = 10.9886(6), b = 11.4604(5), c = 13.4343(7) ?, α = 66.124(2), β = 86.892(2), γ = 86.490(2)°, Z = 1, V = 1543.35(13) ?³; and for (4-MePyH)₅[Mo₅NbI₈Cl₆]Cl₂ (II), monoclinic crystal system, space group C2/m, a = 16.4937(4), b = 14.7335(3), c = 11.6534(3) ?, β = 99.8750(10)°, Z = 2, V = 2789.94(11) ? The geometric parameters of compounds I and II and the conditions for the formation of the complexes with the charges −2 and −3 are discussed.     

Synthesis of heteroligand complex Nd(Phen){( iso -C4H9)2PS2}2(NO3). Crystal structure of [Nd(Phen){( iso -C4H9)2PS2}3] and luminescent properties of these compounds

The heteroligand complex Nd(Phen){(iso-C₄H₉)₂PS₂}₂(NO₃) (I) was synthesized and its IR spectrum was analyzed. The anions (iso-C₄H₉)₂PS_2/− and N_3/− act as bidentate cyclic ligands. The single crystals of [Nd(Phen){iso-C₄H₉)₂PS₂}₃] (II) were obtained on evaporation of a solution of complex I in a mixture CH₂Cl₂-hexane and were studied by X-ray diffraction. Crystals II are triclinic: a = 10.5509(5); b = 14.7432(8), c = 16.8503(10) ?; α = 102.882(2)°, β = 97.211(2)°, γ= 108.087(2)°, V = 2374(2) ?³, Z = 2, ρ(calcd.) = 1.332 g/cm³, space group . The coordination polyhedron of the Nd atom in a separate mononuclear molecule II is a distorted dodecahedron N₂S₆. The molecules are bound by weak van der Waals and π-π interactions. The photoluminescence spectra of complexes I, II were measured and interpreted. Original Russian Text ? S.V. Larionov, V.L. Varand, R.F. Klevtsova, T.G. Leonova, L.A. Glinskaya, E.M. Uskov, 2008, published in Koordinatsionnaya Khimiya, 2008, Vol. 34, No. 12, pp. 944–950.     

Structure of [RuNO(NH3)3(H2O)Cl](NO3)2, product of interaction between hydroxonitrotriamminenitrosoruthenium(II) chloride and nitric acid

The structure of the product formed on boiling [RuNO(NH₃)₃(NO₂)(OH)]Cl·0.5H₂O in 3 M HNO₃ is determined by XRD. The crystals belong to monoclinic symmetry. Crystallographic data for H₁₁ClN₆O₈Ru are: a = 13.7924(4) ?, b = 6.9114(2) ?, c = 12.3577(4) ?, β = 111.863(1)°, V = 1093.27(6) ?³, Z = 4, d _calc = 2.185 g/cm³, space group Cc. The structure is built of complex [RuNO(NH₃)₃(H₂O)Cl]²⁺ cations and NO₃⁻ anions. The compound is studied by IR spectroscopy and X-ray phase analysis. Original Russian Text Copyright ? 2009 by V. A. Emel’yanov, E. V. Kabin, and I. A. Baidina __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 50, No. 3, pp. 598–601, May–June, 2009.     

Synthesis and study of 1,3,7-trimethylpurine-2,6-dione hydrogen dodecatungstenphosphate of composition (C8N4O2H11)2HPW12O40

1,3,7-Trimethylpurine-2,6-dione hydrogen dodecatungstenphosphate (C₈N₄O₂H₁₁)₂HPW₁₂O₄₀ (I) was synthesized. The compound was examined by chemical analysis, IR spectroscopy, X-ray phase analysis and thermogravimetry. The compound I was established to crystallize into monoclinic systems having parameters of elementary cell: a = 10.9129(75), b = 9.1346(70), c = 26.185(23) ?, β = 81.05(27), Z = 2, d _calc = 4.35 g cm⁻³, V = 2578(4) ?³. Original Russian Text ? O.A. Kutanova, G.Z. Kaziev, Holguin Quinones, N.N. Lobanov, L.A. Morales Sánchez, 2009, published in Zhurnal Obshchei Khimii, 2009, Vol. 79, No. 6, pp. 891–894.     

Synthesis, structure, and properties of [RuNO(NH3)4OH][PtCl4] and [RuNO(NH3)4OH][PdCl4]

Double complex [RuNO(NH₃)₄OH][PtCl₄] (I) and [RuNO(NH₃)₄OH][PdCl₄] (II) salts have been prepared and explored with TGA, IR spectroscopy, powder and single crystals X-ray diffraction. Crystal phases of I and II are isostructural (space group Cmc2₁) and have the following crystal chemical characteristics: a = 8.106 Å, b = 18.190(3) Å, c = 8.097 Å, V = 1194.0 ų, Z = 4, ρ_calc = 3.077 g/cm³ (I), and a = 8.116 Å, b = 18.135 Å, c = 8.062 Å, V = 1186.5 ų, Z = 4, ρ_calc = 2.600 g/cm³ (II). The product of thermal decomposition of I in inert and hydrogen atmospheres is a substitution solid solution Pt_0.5Ru_0.5 with the parameter of the FCC unit cell a = 3.856(3) Å. Thermolysis of II affords two-phase mixtures of limited solid solutions of the metals featuring Ru-based HCP and Pd-based FCC cells. __________ Translated from Zhurnal Strukturnoi Khimii, Vol. 48, No.1, pp.114–121, January–February, 2007.     

Two New Octahedral Cd(II) Complexes [Cd(L)2] and {[Cd(LH)2(SCN)2]H2O} [L = C6H5C(OH)NN = C(CH3)C5H4N]: Synthesis and Structural Studies

Two new octahedral Cd(II) complexes [Cd(L)₂] (1) and {[Cd(LH)₂(SCN)₂]H₂O} (2) [where LH = C₁₄H₁₃N₃O] are synthesized using a tridentate hydrazone ligand (LH) and they are characterized by elemental analysis, IR spectra, NMR spectra, thermal studies and finally the structures have been determined by single crystal X-ray diffraction. Complex 1 crystallizes in monoclinic system, space group C2/c with a = 22.565(6) ?, b = 10.252(3) ?, c = 12.187(4) ?, β = 118.851(2)^∘, and Z = 4. Complex 2 also crystallizes in the monoclinic system, space group P2₁/c with a = 9.257(9)?, b = 17.809(2)?, c = 9.548(9)?, β = 107.439(4)^∘, and Z = 2. In 1 the ligand binds the Cd(II) ion in tridentate fashion, whereas in 2 it acts as a bidentate ligand.