Synthese neuer optisch aktiver Rh-Komplexe: Die Kristallstruktur von [(5S)-3,4-Bis(diphenylphosphino)-5-menthoxy-2(5H)-furanon](1,5-cyclooctadien)rhodium-hexafluorophosphat / Synthesis of New Optically Active Rh-Complexes: The Crystal Structure of [(5S)-3,4-Bis(diphenylphosphino)-5-menthoxy-2(5 H)-furanone](1,5-cyclooctadiene)rhodium-hexafluorophosphate

1989 ◽  
Vol 44 (8) ◽  
pp. 884-888 ◽  
Author(s):  
Dieter Fenske ◽  
Kurt Merzweiler
Keyword(s):  
Crystal Structure ◽  
Methyl Ester ◽  
Single Crystal ◽  
Enantiomeric Excess ◽  
Optically Active ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants

The chiral diphosphine 1 reacts with [(diolefin)Rh(THF)2]PF6 (diolefine: 1.5-cyclooctadiene, norbornadiene) to form the complexes 4 and 5. The structure of 4 was determined by single crystal X-ray analysis. 4 crystallizes in the monoclinic space group P21. The lattice constants (at 180 K) are: a = 974.0(6); b = 3889.2(29); c = 1309.4(5) pm; β = 105.25(4)°. The hydrogenation of methyl-α-acetamidocinnamate in the presence of 5 yields (R)-N-acetylphenylalanine methyl ester with 33% enantiomeric excess.

Crystal Structure and Vibrational Behaviour of Aqua Di(saccharinato)di(nicotinamide)copper(II)

2002 ◽  
Vol 57 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Beatriz S. Parajón-Costaa ◽  
Enrique J. Baran ◽  
Oscar E. Piro ◽  
Eduardo E Castellano
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Ir Spectrum ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

The crystal structure of [Cu(sac)2(nic)2(H2O)] (sac = saccharinate anion; nic = nicotinamide) has been determined by single-crystal X-ray diffraction. It crystallizes in the monoclinic space group C2/c with Z = 4 and the Cu(II) ion presents a CuN4O square pyramidal coordination. Some comparisons with related structures are made and the most important features of its IR spectrum were also discussed.

Anionische Komplexe [Mo2(O2CPh)4X2]2⊖ mit X = N3, Cl, Br. Die Kristallstruktur von (PPh4)2[Mo2(O2CPh)4Cl2] · 2CH2Cl2 / Anionic Complexes [Mo2(O2C-Ph)4X2]2⊖ with X = N3, Cl, Br. The Crystal Structure of (PPh4)2[Mo2(O2C-Ph)4Cl2] · 2CH2Cl2

1985 ◽  
Vol 40 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Kay Jansen ◽  
Kurt Dehnicke ◽  
Dieter Fenske
Keyword(s):  
Crystal Structure ◽  
Ir Spectra ◽  
Diffraction Data ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Anionic Complexes

The syntheses and IR spectra of the complexes [Mo2(O2C-Ph)4X2]2⊖ with X = N3, CI, Br and the counter ion PPh4⊕ are reported. The azido and the bromo complexes are obtained from a solution of [Mo2(O2CPh)4] with PPh4N3 in pyridine or by reaction with PPh4Br in CH2Br2, respectively. When (PPh4)2[Mo2(O2CPh)4(N3)2] is dissolved in CH2Cl2, nitrogen is evolved and the complex with X = CI is obtained. The crystal structure of (PPh4)2[Mo2(O2CPh)4Cl2] · 2CH2Cl2 was determined from X-ray diffraction data (5676 observed independent reflexions, R = 0.042). It crystallizes in the monoclinic space group P21/n with four formula units per unit cell; the lattice constants are a = 1549, b = 1400, c = 1648 pm, β = 94.6°. The centrosymmetric [Mo2(O2CPh)4Cl2]2⊖ ion has a rather short Mo-Mo bond of 213 pm, whereas the MoCl bonds are very long (288 pm)

scholarly journals Serendipitous formation and characterization of K2[Pd(NO3)4]·2HNO3

2019 ◽  
Vol 74 (4) ◽  
pp. 381-387
Author(s):  
Michael Zoller ◽  
Jörn Bruns ◽  
Gunter Heymann ◽  
Klaus Wurst ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Monoclinic Space Group ◽  
Solvothermal Process ◽  
X Ray Diffraction ◽  
Glass Ampoule ◽  
Space Group ◽  
X Ray ◽  
Complex Anions

AbstractA potassium tetranitratopalladate(II) with the composition K2[Pd(NO3)4] · 2HNO3 was synthesized by a simple solvothermal process in a glass ampoule. The new compound crystallizes in the monoclinic space group P21/c (no. 14) with the lattice parameters a = 1017.15(4), b = 892.94(3), c = 880.55(3) Å, and β = 98.13(1)° (Z = 2). The crystal structure of K2[Pd(NO3)4] · 2HNO3 reveals isolated complex [Pd(NO3)4]2− anions, which are surrounded by eight potassium cations and four HNO3 molecules. The complex anions and the cations are associated in layers which are separated by HNO3 molecules. K2[Pd(NO3)4] · 2HNO3 can thus be regarded as a HNO3 intercalation variant of β-K2[Pd(NO3)4]. The characterization is based on single-crystal X-ray and powder X-ray diffraction.

Notizen: Eine neue bicyclische Zinn-Selen-Verbindung. Synthese und Kristallstruktur von [{Cp(CO)2Fe}3ClSn3Se4] / A New Bicyclic Tin Selenium Compound. Synthesis and Crystal Structure of [{Cp(CO)2Fe}3ClSn3Se4]

1993 ◽  
Vol 48 (7) ◽  
pp. 1009-1012 ◽  
Author(s):  
Kurt Merzweiler ◽  
Harald Kraus
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Synthesis And Crystal Structure ◽  
Selenium Compound ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Compound Synthesis

[{Cp(CO)2Fe}SnCl3] reacts with Na2Se in THF to form the compound [{Cp(CO)2Fe}3ClSn3Se4] 1. 1 crystallizes in the monoclinic space group P21/n with 4 formula units per unit cell. The lattice constants are α = 1435.2(7), b = 1124.4(4), c = 1972.7(12) pm, β = 94.59(4)°. According to the X-ray structure determination 1 contains a bicyclic Sn3Se4 framework.

scholarly journals Ba2ZnGe2S6O: Ein neues Oxidsulfid mit Tetraedergerüststruktur/On Ba2ZnGe2S6O. A New Oxide Sulfide with Tetrahedral Framework Structure

1980 ◽  
Vol 35 (6) ◽  
pp. 672-675 ◽  
Author(s):  
Chr. L. Teske
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Coordination Sphere ◽  
Framework Structure ◽  
Tetrahedral Framework ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
First Time ◽  
Ray Methods

Abstract Ba2ZnGe2S6O was prepared for the first time and the crystal structure determined by using single crystal X-ray methods. The space group is D32d-P4̄21m, tetragonal (No. 113). Lattice constants: a = 963.59 ± 0.22; c = 645.06 ± 0.25 pm. The tetrahedral framework structure is described and discussed. Zn is linked only to sulfur. The oxygen belongs to the coordination sphere of Ge and Ba.

The crystal structure of Bis[2-(pyridin-2-ylamino)-4-(pyridin-2-yl)thiazole]iron(II) Bis(tetrafluoroborate) trihydrate

1984 ◽  
Vol 37 (2) ◽  
pp. 443 ◽  
Author(s):  
AT Baker ◽  
HA Goodwin ◽  
AD Rae
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Complex Cation ◽  
Monoclinic Space Group ◽  
Octahedral Structure ◽  
Space Group ◽  
X Ray ◽  
Disordered Structure ◽  
Distorted Octahedral ◽  
A Cell

The crystal structure of an iron(II) complex of 2-(pyridin-2-ylamino)-4-(pyridin-2-yl)tliazoe (paptH) has been determined by single-crystal X-ray diffractometry. [Fe(paptH)2] [BF4]2.3H2O is monoclinic, space group P21/c, with Z = 4 in a cell of dimensions a 8.968(6), b 9.038(4), c 41.15(2)�, β 94.81(2)�. The disordered structure was refined to a residual R 0.0826 for 2549 observed reflections. The ligands and anions are orientationally disordered, and the waters of crystallization are positionally disordered. Comprehensive constrained refinement, with 220 parameters for 139 atom positions, produced reliable geometry. The complex cation has a distorted octahedral structure of meridional configuration with both paptH ligands functioning as tridentates.

On the synthesis of cryptosporiopsin: stereochemistry of early intermediates

1982 ◽  
Vol 60 (16) ◽  
pp. 2062-2064
Author(s):  
George M. Strunz ◽  
Peter S. White
Keyword(s):  
Carboxylic Acid ◽  
Methyl Ester ◽  
Single Crystal ◽  
Acid Methyl Ester ◽  
Direct Methods ◽  
Monoclinic Space Group ◽  
Synthetic Route ◽  
Space Group ◽  
X Ray ◽  
Acid Methyl

The relative configurations of two intermediates in the synthetic route to cryptosporiopsin are clarified through the structure of 3,5-dichloro-1,4-dihydroxy-2-methylcyclopent-2-ene-1-carboxylic acid methyl ester, which was determined by single crystal X-ray techniques. The crystal was monoclinic, space group P21/c, a = 7.352(1), b = 8.868 (3), c = 16.300(7) Å; β = 96.49(2)°. The structure was solved by direct methods and refined to a final R of 0.057.

scholarly journals Preparation and Crystal Structure of Zinc Bis[orotate(1–)] Octahydrate

1993 ◽  
Vol 48 (7) ◽  
pp. 961-964 ◽  
Author(s):  
Otto Kumberger ◽  
Jürgen Riede ◽  
Hubert Schmidbaur
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Medical Treatment ◽  
Single Crystal ◽  
Crystal Lattice ◽  
Structure Analysis ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray

A discrete zinc bis[orotate(1—)] complex of the composition Zn(OrH)2·8 H2O has been isolated and characterized by a single-crystal X-ray structure analysis. The crystals are monoclinic, space group P21/c (No. 14), Z = 2, a = 10.884(2), b = 12.896(1), c = 6.954(1) Å, β = 98.27(1)°. The crystal lattice features hexaquo complexes of zinc, the Zn(H2O)62+ cations being associated with two hydrated OrH- ions only through hydrogen bonds. The results are relevant for applications of zinc orotates in medical treatment.

Crystal structure of zerumbone [(E,E,E)-2,6,9,9-Tetramethylcycloundeca-2,6,10-trien-1-one]

1981 ◽  
Vol 34 (10) ◽  
pp. 2243 ◽  
Author(s):  
SR Hall ◽  
S Nimgirawath ◽  
CL Raston ◽  
A Sittatrakul ◽  
S Thadaniti ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Zingiber Zerumbet ◽  
Space Group ◽  
X Ray ◽  
Considerable Distortion

The crystal structure of zerumbone, C15H22O, extracted from the rhizomes of Zingiber zerumbet Smith, has been determined by single-crystal X-ray diffraction at 295(1) K and refined by least squares to a residual of 0.051 for 925 'observed' reflections. Crystals are monoclinic, space group P21/c, a 9.036(3), b 9.712(5), c 15.643(6) �, β 97.19(3)�, Z = 4. Although the molecule has no chiral centre, the presence of the three trans double bonds confers considerable distortion and rigidity on the eleven-membered ring and renders the whole molecule chiral and potentially resolvable.

Reaktion von [Co(But2PH)2I2] mit [Ru3(CO)12]: Synthese und Röntgenkristallstrukturanalyse von [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]/ Reaction of [Co(But2PH)2I2] with [Ru3(CO)12]: Synthesis and X-Ray Crystal Structure of [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)]

1998 ◽  
Vol 53 (8) ◽  
pp. 865-870 ◽  
Author(s):  
Marion Graf ◽  
Kurt Merzweiler ◽  
Clemens Bruhn ◽  
Hans-Christian Böttcher
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Cluster Expansion ◽  
Metal Clusters ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
The Novel ◽  
Space Group ◽  
X Ray ◽  
Iodine Transfer

Abstract [Co(But2PH)2I2] (1) reacts with [Ru3(CO)12] in refluxing toluene to give a mixture of products including the novel metal clusters [Ru3(CO)6(μ-H)(μ-I)2(μ-PBut2)(But2PH)] (2) and [Ru3(CO)7(μ-H)(μ-I)(μ-PBut2)2] (3) besides the known complex [Ru3(CO)8(μ-H)2(μ3- PBut)(But2PH)] (4). No cluster expansion products could be observed. Thus the cobalt compound acts merely as a phosphine and iodine transfer reagent. The molecular structures of the metal complexes 1 and 2 were determined by single-crystal X-ray structure analyses. 1 crystallizes in the tetragonal space group P4̄21c with a = 13.230(3), b = 13.230(3), c = 14.788(3)Å, V = 2588.4(9)A . 2 crystallizes in the monoclinic space group P21/c with a = 18.161(2), b = 10.292(2), c = 18.381(2)Å, β = 108.73(10)°, V= 3253.7(8)Å3.

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