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- Item(μ5-Cyclo-penta-dien-yl)bis-(triphenyl-phosphane)cobalt(I) -toluene-n-hexane (1/0.20/0.25)(Chester : International Union of Crystallography, 2008) Hapke, M.; Spannenberg, A.The title compound, [Co(C5H5)(C18H15P)2]·0.2C7H8·0.25C6H14, was synthesized by the reaction of cobaltocene, Cp2Co, with elemental lithium in tetra-hydro-furan in the presence of two equivalents of PPh3. The mol-ecular structure displays a cobalt(I) center in a distorted trigonal-planar coordination environment, with one Cp and two phosphane ligands. There are two crystallographically independent mol-ecules in the asymmetric unit besides the disordered solvent molecules.
- ItemRedetermination of terbium scandate, revealing a defect-type perovskite derivative(Chester : International Union of Crystallography, 2008) Veličkov, B.; Kahlenberg, V.; Bertram, R.; Uecker, R.The crystal structure of terbium(III) scandate(III), with ideal formula TbScO3, has been reported previously on the basis of powder diffraction data [Liferovich & Mitchell (2004). J. Solid State Chem. 177, 2188-2197]. The current data were obtained from single crystals grown by the Czochralski method and show an improvement in the precision of the geometric parameters. Moreover, inductively coupled plasma optical emission spectrometry studies resulted in a nonstoichiometric composition of the title compound. Site-occupancy refinements based on diffraction data support the idea of a Tb deficiency on the A site (inducing O defects on the O2 position). The crystallochemical formula of the investigated sample thus may be written as A(0.04Tb0.96) BScO2.94. In the title compound, Tb occupies the eightfold- coordinated sites (site symmetry m) and Sc the centres of corner-sharing [ScO6] octa-hedra (site symmetry ). The mean bond lengths and site distortions fit well into the data of the remaining lanthanoid scandates in the series from DyScO3 to NdScO3. A linear structural evolution with the size of the lanthanoid from DyScO3 to NdScO3 can be predicted.
- ItemMagnetically induced reorientation of martensite variants in constrained epitaxial Ni-Mn-Ga films grown on MgO(001)(Milton Park : Taylor & Francis, 2008) Thomas, M.; Heczko, O.; Buschbeck, J.; Rößler, U.K.; McCord, J.; Scheerbaum, N.; Schultz, L.; Fähler, S.Magnetically induced reorientation (MIR) is observed in epitaxial orthorhombic Ni-Mn-Ga films. Ni-Mn-Ga films have been grown epitaxially on heated MgO(001) substrates in the cubic austenite state. The unit cell is rotated by 45° relative to the MgO cell. The growth, structure texture and anisotropic magnetic properties of these films are described. The crystallographic analysis of the martensitic transition reveals variant selection dominated by the substrate constraint. The austenite state has low magnetocrystalline anisotropy. In the martensitic state, the magnetization curves reveal an orthorhombic symmetry having three magnetically non-equivalent axes. The existence of MIR is deduced from the typical hysteresis within the first quadrant in magnetization curves and independently by texture measurement without and in the presence of a magnetic field probing micro structural changes. An analytical model is presented, which describes MIR in films with constrained overall extension by the additional degree of freedom of an orthorhombic structure compared to the tetragonal structure used in the standard model.
- ItemCrystal structure of bis(1,3-bis[{4-methyl-pyridin-2-yl}amido]-1,1,3,3-tetramethyldisiloxane)dichromium dichloride, [(C16H24N4OSi2)CrCl]2(Berlin : de Gruyter, 2006) Irrgang, T.; Spannenberg, A.; Kempe, R.C32H48Cl2Cr2N8O2Si=, monoclinic, P121/n1 (no. 14), a = 12.416(2) Å, b = 13.668(3) Å, c = 13.172(3) Å, β = 113.83(3)°, V= 2044.8 A3, Z = 2, Rgt(F) = 0.052, wRref(F2) = 0.110, T = 200 K. © 2014 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München. All rights reserved.
- ItemCrystal structure of μ-oxo-bis(σ- 1,2-bis(trimethylsilyl) vinylhafnocene) benzene solvate, [C2H{Si(CH3) 3}2Hf(C5H5)2] 2O ·C6H6(Berlin : de Gruyter, 2007) Spannenberg, A.; Beweries, T.; Bach, M.A.; Rosenthal, U.C42H64Hf2OSi4, monoclinic, P121/c1 (no. 14), a = 11.442(1) Å = 9.7998(6) Å, c = 19.827(2) Å, β = 95.229(7)°, V = 2213.9 Å, Z = 2, R gt(F) = 0.017, wRref(F2)=0.037, T=200K. © by Oldenbourg Wissenschaftsverlag,.
- ItemCrystal structure of (η4-cycloocta-1,5-dien)-N-(2- (diphenylphosphinooxy)-3-(naphthalen-1-yloxy)propyl)-N-(pentan-3-yl)-1, 1-diphenylphosphinamine-rhodium(I) tetrafluoroborate, [Rh(C8H 12)(C42H43NO2P2)][BF 4](Berlin : de Gruyter, 2007) Dai, Z.; Heller, D.; Preetz, A.; Drexler, H.-J.C50H55BF4NO2P2Rh, monoclinic, P1211 (no. 4), a = 12.722(3) Å, b = 15.248(3) Å, c = 12.818(3) Å, β = 115.80(3)°, V = 2238.7 Å3, Z = 2, Rgt(F) = 0.036, wRref(F 2) = 0.079, T = 200 K. © by Oldenbourg Wissenschaftsverlag.
- ItemCrystal structures of tribromo(η5-3,6-di-tert-butyl-9,10,11- trimethyl-bicyclo(6.3.0)undeca-4-en-8,10-dienyl)titanium(IV), Ti(C 22H35)Br3, and tribromo(η5-4,5- dibromo-3,6-di-tert-butyl-9,10,11-trimethyl-bicyclo(6.3.0)undeca-8,10-dienyl) titanium(IV), Ti(C22H35Br2)Br3(Berlin : de Gruyter, 2008) Spannenberg, A.; Burlakov, V.V.; Rosenthal, U.C22H35Br3Ti, triclinic, P1̄ (no. 2), a = 9.621(2) Å, b = 11.796(2) Å, c = 12.232(2) Å, α = 102.23(3)°, β = 97.71(3)°, γ = 112.32(3)°, V = 1219.2 Å3, Z = 2, Rgt(F) = 0.058, wRobs(F 2) = 0.134, T = 293 K. C22H35Br5Ti, monoclinic, P121/n1 (no. 14), a = 7.474(1) Å, b = 18.458(4) Å, c = 20.171(4) Å, β = 100.28(3)°, V= 2738.0 Å3, Z = 4, Rgt(F) = 0.054, wRobs(F 2) = 0.119, T = 293 K. © by Oldenbourg Wissenchaftsverlag.
- ItemCrystal structure of η5-3,6-di-tert-butyl-4- (tris(pentafluorophenyl)boranyloxycarbonyl)-5-(η5- tetramethylcyclopentadienyl-methyl-9,10,11-trimethyl-bicyclo(6.3.0) undeca-4-en-8,10-dienyl)titanium(III) toluene hemisolvate, Ti(C 51H47BF15O2) · 0.5C 7H8(Berlin : de Gruyter, 2008) Spannenberg, A.; Burlakov, V.V.; Rosenthal, U.C54.50H51BF15O2Ti, triclinic, P1̄ (no. 2), a = 11.603(2) Å, b = 12.872(3) Å, c = 18.142(4) Å, α = 76.47(3)°, β = 77.99(3)°, γ = 69.13(3)°, V = 2438.2 Å5, Z = 2, Rgt(F) = 0.048, wRobs(F2) = 0.114, T = 200 K. © by Oldenbourg Wissenchaftsverlag.
- ItemCrystal structures of 1-2-(dicyclohexylphosphinophenyl)pyrol-2- dicyclohexylphosphino-rhodium(I) norborna-2,5-diene tetrafluoroborate tetrahydrofuran hemisolvate, [Rh(C34H5INP 2)(C7H8)] [BF4] · 0.5C 4H8O, and 1-2-(dicyclohexylphosphinophenyl)-pyrol-2- dicyclohexylphosphino-rhodium(I) (Z,Z)-cycloocta...(Berlin : de Gruyter, 2007) Jackstell, R.; Dai, Z.; Schmidt, T.; Heller, D.; Drexler, H.-J.Title full: Crystal structures of 1-2-(dicyclohexylphosphinophenyl)pyrol-2- dicyclohexylphosphino-rhodium(I) norborna-2,5-diene tetrafluoroborate tetrahydrofuran hemisolvate, [Rh(C34H5INP 2)(C7H8)] [BF4] · 0.5C 4H8O, and 1-2-(dicyclohexylphosphinophenyl)-pyrol-2- dicyclohexylphosphino-rhodium(I) (Z,Z)-cycloocta-1,5-diene tetrafluoroborate, [Rh(C34H5INP2)(C8H12)] [BF4]. C43H63BF4NO0.50P2 Rh, monoclinic, P121/n1 (no. 14), a = 10.341(2) Å, b = 16.063(3) Å, c = 27.425(5) Å, β = 98.76(3)°, V= 4502.4 Å3, Z = 4, Rgt(F) = 0.060, wRref(F 2) = 0.143, T = 200 K. C42H63BF 4NP2Rh, monoclinic, P121/c1 (no. 14), a = 10.503(2) Å, b = 17.665(4) Å, c = 21.946(4) Å, β = 101.95(3)°, V= 3983.5 Å3, Z = 4, Rgt(F) = 0.045, wRref(F2) = 0.013, T =200 K. © by Oldenbourg Wissenschaftsverlag,.
- ItemCrystal structure of η5-1-(tris(pentafluorophenyl) boranylmethyl)-2,3,4,5-tetramethylcyclopentadienyl-η5, η1-3,6-di-tert-butyl-9,10,11-trimethyl-bicyclo(6.3.0) undeca-3-en-8,10-dienyl)titanium(IV),Ti(C50H48BF 15)(Berlin : de Gruyter, 2008) Spannenberg, A.; Burlakov, V.V.; Rosenthal, U.C50H48BF15Ti, monoclinic, P12 1/c1 (no. 14), a = 12.007(2) Å, b = 19.511(4) Å, c = 20.010(4) Å, β = 98.90(3)°, V= 4631.3 Å3, Z = 4, Rgt(F) = 0.052, wRref(F2) = 0.120, T = 200 K. © by Oldenbourg Wissenchaftsverlag.