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Triclinic Space Group P (triclinic + space_group_p)
Selected AbstractsStructure and conformation of a nickel complex: {2-Hydroxo-3-piperidine-1-yl-methyl-N,N,(bis-5-bromobenzylpropylenediimine)nickel(II)perchlorate}CRYSTAL RESEARCH AND TECHNOLOGY, Issue 2 2004S. M. Malathy Sony Abstract The title compound, a nickel complex [C23H26N3O2Br2Ni.(ClO4)] (CCDC 199520) crystallizes in triclinic space group P with the cell parameters a = 10.2560(4), b = 10.8231(4), c = 12.0888(5)Å, , = 99.404(1), , = 99.780(1), , = 92.252(1)° and V = 1301.49(9)Å3. The structure was solved by Patterson method and refined by full-matrix least-squares procedures to a final R = 0.0497 using 6287 observed reflections. In the complex, the piperidine ring takes chair conformation and the geometry around the Ni ion is slightly distorted square planar. The dihedral angle between the planes [N-Ni-N and O-Ni-O] is 9.4(1)°. The chelate ring containing both the nitrogen atoms adopts twisted boat conformation. The molecules in the crystal are stabilized by N-H,O and C-H,O types of hydrogen bonds in addition to a C-H,, interaction. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source] Mixed-Ligand Oxidovanadium(V) Complexes with N, -Salicylidenehydrazides: Synthesis, Structure, and 51V Solid-State MAS NMR Investigation,EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 14 2008Simona Nica Abstract The synthesis and spectroscopic characterization of a series of three oxidovanadium(V) complexes with 8-hydroxyquinoline and Schiff-base ligands derived from salicylaldehyde and ,-hydroxy-functionalized carbohydrazides with different chain lengths are reported. The complex with the hydrazone ligand containing the shortest chain length was crystallographically characterized. This complex crystallizes in the triclinic space group P with two structurally similar but crystallographically independent oxidovanadium(V) complexes. Each vanadium atom is six-coordinate in a distorted-octahedral geometry. The two molecules are assembled through hydrogen-bonding interactions between the hydroxyl groups of the side-chain substituted Schiff-base ligand and the oxido group of one of the two complexes. Electrochemical measurements performed in acetonitrile solution reveal two reversible one-electron reduction steps. The observed pre-wave feature of the second reduction step indicates the presence of dissociation equilibria related to the 8-hydroxyquinoline coligand. Magic-angle spinning solid-state 51V NMR spectroscopy allowed to characterize the full series of complexes with alkyl and hydroxy alkyl-substituted hydrazone ligands that were used. The quadrupolar coupling constants are small with a value of about 4 MHz and show little variation within the series. The asymmetry of the chemical shift tensor indicates a rather axial symmetric environment around the vanadium(V) center. The isotropic chemical shifts observed in the solid state occur at about 30 ppm, which is in the same order of magnitude as the solvent induced variations, about 10 ppm, found for different solvents.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) [source] Structural Relationships in High-Nuclearity Heterobimetallic Bismuth-Oxo ClustersEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 24 2005Michael Mehring Abstract The novel heterobimetallic sodium-bismuth-oxo clusters [Bi2Na4O(OSiMe3)8] (1), [Bi10Na5O7(OH)6(OSiMe3)15]·1.5C7H8 (2·1.5C7H8), [Bi15Na3O18(OSiMe3)12]·C7H8 (3·C7H8) and [Bi14Na8O18(OSiMe3)14(THF)4]·C6H6 (4·C6H6) were prepared starting from BiCl3 and NaOSiMe3. Compound 1 crystallises in the trigonal space group Rc with the lattice constants a = 12.8844(3) Å and c = 54.6565(3) Å, compound 2·1.5C7H8 crystallises in the triclinic space group P with the lattice constants a = 15.0377(2) Å, b = 16.0373(2) Å, c = 27.8967(5) Å, , = 87.1321(6)°, , = 86.6530(7)° and , = 63.6617(6)°, compound 3·C7H8 crystallises in the monoclinic space group C2/c with the lattice constants a = 54.311(11), b = 19.846(4), c = 22.885(5) Å and , = 112.32(3)°, and compound 4·C6H6 crystallises in the trigonal space group R with the lattice constants a = 15.9786(4) Å and c = 46.8329(17) Å. The formation of M,O,M bonds results from both partial hydrolysis followed by condensation as well as from elimination of Me3SiOSiMe3 from M,OSiMe3 groups. The hexanuclear metal-oxo silanolate 1 is more conveniently synthesised by the addition of NaOSiMe3 to a toluene solution of in situ-prepared [Bi(OSiMe3)3]. The metal-oxo(hydroxo) silanolates differ significantly in composition, but show similar building units. Thermal decomposition of the metal-oxo silanolates in the solid state gave heterogeneous decomposition products containing bismuth silicates. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) [source] Synthesis and Characterisation of Ternary Cage Compounds with Adamantane-Like M4P4Si2 (M = Al, Ga, In) Core StructuresEUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 16 2003Carsten von Hänisch Abstract The reactions of [LiAl(PH2)4] or [NaAl(PH2)4] with Et2SiCl2 or iPr2SiCl2 yield the dialkyldiphosphanylsilanes Et2Si(PH2)2 (1) and iPr2Si(PH2)2 (2), respectively. Both compounds were identified by NMR spectroscopy as well as mass spectrometry. Compound 2 reacts with MEt3 (M = Al, Ga, In) to form the cage compounds [iPr2Si{P(H)MEt2}2]2 (3: M = Al, 4: M = Ga, 5: M = In). These three clusters were fully characterised by NMR and IR spectroscopy as well as by single-crystal X-ray diffraction. The central structural motif of 3,5 is an adamantane-like cage composed of four metal, four phosphorus and two silicon atoms. They are the first ternary clusters with these combinations of elements and crystallise isotypical in the triclinic space group P ; the lattice constants are: 3: a = 1129.0(6), b = 1164.8(8), c = 1750.6(8) pm; , = 83.63(5), , = 81.53(4), , = 73.39(5)°; 4: a = 1125.9(7), b = 1159.0(7), c = 1744.7(7) pm; , = 83.71(4), , = 81.89(4), , = 73.05(5)°; 5: a = 1147.4(2), b = 1174.7(2), c = 1753.3(4) pm; , = 85.32(3), , = 82.03(3), , = 73.40(3)°. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) [source] Nitrogen-Rich Compounds of the Lanthanoids: The 5,5,-Azobis[1H -tetrazol-1-ides] of some Yttric Earths (Tb, Dy, Ho, Er, Tm, Yb, and Lu)HELVETICA CHIMICA ACTA, Issue 7 2009Georg Steinhauser Abstract A set of N-rich salts, 3,9, of the heavy lanthanoids (terbium, 3; dysprosium, 4; holmium 5; erbium, 6; thulium, 7; ytterbium, 8; lutetium, 9) based on the energetic 5,5,-azobis[1H -tetrazole] (H2ZT) was synthesized and characterized by elemental analysis, vibrational (IR and Raman) spectroscopy, and X-ray structure determination. The synthesis of the lanthanoid salts 3,9 was performed by crystallization from concentrated aqueous solutions of disodium 5,5,-azobis[1H -tetrazol-1-ide] dihydrate (Na2ZT,2,H2O; 1) and the respective Ln(NO3)3,5,H2O and yielded large rhombic crystals of the type [Ln(H2O)8]2(ZT)3,6,H2O in ca. 70% of the theoretical yield. The compounds 3,9 are isostructural (triclinic space group P) to the previously published yttrium salt 2; they show, however, a clear lanthanoid contraction of several crystallographic parameters, e.g., the cell volume or the LnO bond lengths of the Ln3+ ions and the coordinating H2O molecules. The lanthanoid contraction influences the strengths of the H-bonds, which can be observed as a red shift by 4,cm,1 in the characteristic IR band, in particular from 3595,cm,1 (3) to 3599,cm,1 (9). In good agreement with previous works, 2,9 are purely salt-like compounds without a coordinative bond between the tetrazolide anion and the Ln3+ cation. [source] Redetermination of iron dialuminide, FeAl2ACTA CRYSTALLOGRAPHICA SECTION C, Issue 9 2010Ihor Chumak The crystal structure of iron dialuminide [Corby & Black (1973). Acta Cryst. B29, 2669,2677] has been redetermined on a single crystal synthesized from the elements by arc melting. The compound crystallizes in the triclinic space group P with 19 atoms per unit cell, one Fe site being on an inversion centre. The crystal structure can be described as an inclusion-plus-deformation derivative of the orthorhombic YPd2Si structure type. [source] New Type of Polymeric Chain Constructed by Exo-bidentate Binaphthol DerivativeCHINESE JOURNAL OF CHEMISTRY, Issue 10 2005Ya-Qiong Gong Abstract The self-assembly of a racemic exo-bidentate ligand 2,2,-bis(4-pyridylmethyloxy)-1,1,-binaphthyl, namely Rac -L, with cadmium(II) salt gave rise to a new one-dimensional polymer, which has been characterized by single crystal X-ray diffraction analysis. The polymer crystallizes in a triclinic space group P -1 with unit cell parameters: a=0.6976(1) nm, b=1.30160(14) nm, c=1.71146(17) nm,,=105.141(3) °,,=94.263(5)°,,=100.405(4)°, V=1.4633(2) nm3, Z=2, C32H29CdCl2N2O4.5, M=696.88, Dc=1.584 g/cm3, F(000) =708, ,(Mo K,) =0.972 mm,1. The final R and wR are 0.0498 and 0.1282 for 5079 observed reflections with I,,(I). [source] A New Hydroxo-bridged Chromium(III) Dimer [Cr(saltn)OH]2·4H2O: Synthesis, Crystal Structure and Magnetic PropertiesCHINESE JOURNAL OF CHEMISTRY, Issue 6 2005Ni Zhong-Hai Abstract A new hydroxo-bridged dimeric Cr(III) complex [Cr(saltn)OH]2·4H2O [H2saltn=N,N,-bis(salicylidene)trimethylenediamine] has been synthesized and its structural and magnetic properties have been investigated. The complex crystallizes in the triclinic space group P -1 with one dimeric formula unit in a cell of dimensions a=0.95828(19) nm, b=0.95926(19) nm, c=1.0437(2) nm, ,=86.77(3)°, ,=82.48(3)°, and ,=64.93(3)°. The geometry around each chromium(III) center is six-coordinate, distorted-octahedral. The bridging Cr2O2 unit is strictly planar, as required by the crystallographic symmetry. The CrOCr, bridging angle is 99.94(16)°, and the distance between Cr,Cr, is 0.3019 nm. The magnetic susceptibility of the complex has been examined in the range of 2-300 K. By using the spin-spin coupled model for an S1=S2=3/2 dimeric system , the magnetic data were fitted to give the parameters of g=2.01(1), J=-0.85(2) cm -1, and zJ' =0.18(3)cm -1, indicating the presence of a weak antiferromagnetic spin-exchange interaction between the Cr(III) ions in the binuclear complex. [source] | ||||||||||