Crystal structure of cis-Tetracarbonylbis(chloromercury)iron

1976 ◽  
Vol 29 (9) ◽  
pp. 1905 ◽  
Author(s):  
CL Raston ◽  
AH White ◽  
SB Wild
Keyword(s):  
Crystal Structure ◽  
Least Squares ◽  
Diffraction Data ◽  
Title Compound ◽  
Direct Methods ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Independent Molecules

The crystal structure of the title compound has been determined by direct methods from X-ray diffraction data and refined by least squares to a residual of 0.071 for 2647 'observed' reflections. Crystals are monoclinic, C2/c, a = 36.81(1), b = 11.181(2), c = 20.369(5) �, β = 95.28(3)�, Z = 32. There are four independent molecules in the asymmetric unit, all with the cis disposition of ligands (<Fe-Hg), 2.498 �; <Hg-Fe-Hg), 80.9�); in one of the molecules one of the carbonyl sites is occupied by a more substantial moiety, possibly a result of partial occupancy of HgCl as a result of disorder or decomposition.

Crystal structure of trans-chlorobis(ethane-l,2-diamine)sulfitocobalt(III) monohydrate

1980 ◽  
Vol 33 (2) ◽  
pp. 419 ◽  
Author(s):  
CL Raston ◽  
AH White ◽  
JK Yandell
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Independent Molecules

The crystal structure of the title compound, [Co(en)2ClSO3],H2O (en = ethane-1,2-diamine), has been determined by single-crystal X-ray diffraction methods at 295(1) K and refined by least squares to a residual of 0.050 for 3252 'observed' reflections. Crystals are monoclinic, P21/c, a 9.862(4), b 15.897(8), c 16.936(7) Ǻ, β 117.44(4)°, Z 8. The two independent molecules in the asymmetric unit are pseudosymmetrically related. (Co-S) is 2.204 Ǻ, while (Co-Cl) is the longest six-coordinate cobalt(III)-chloride distance observed, being 2.377 Ǻ.

Crystal structure of Hydroxyimino(N,N'-dimethyl)malonamide

1977 ◽  
Vol 30 (9) ◽  
pp. 1929 ◽  
Author(s):  
SR Hall ◽  
CL Raston ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Direct Methods ◽  
Crystal Data ◽  
X Ray Diffraction ◽  
X Ray ◽  
Independent Molecules

The crystal structure of the title compound, namely hydroxyimino(N,N?- dimethyl)malonamide (MeNHCOC(=NOH)CONHMe), has been determined by single-crystal X-ray diffraction with diffractometer data at 295 K. The structure was solved by direct methods and refined by least squares to a residual of 0.055 for 1477 observed reflections. ��� Crystal data: monoclinic, P21/n, a 15.508(3), b 10.544(2), c 9.377(1) Ǻ, β 103.15(2)�, Z 8. ��� The two crystallographically independent molecules exhibit little conjugation throughout the C-C-C skeleton (<C-C> 1.50 Ǻ), the molecule being non-planar. <C=O> is 1.234, <N-CH3> 1.443, <OC-N> 1.323, <C-NO> 1.278 and (N-O) 1.375 Ǻ. The geometry is compared with those observed for several related derivatives.

Crystal structure of (S*S*)-5-(1′-aminoethyl)-4,5-dihydro-3,5-diphenylisoxazole

1989 ◽  
Vol 189 (3-4) ◽  
Author(s):  
Ridha Ben Cheikh ◽  
Ahmed Kallel
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Diffraction Data ◽  
Title Compound ◽  
Direct Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compound C

AbstractCrystals of the title compound, CAtomic positions have been determined by direct methods from single crystal X-ray diffraction data and refined by least squares to

scholarly journals Diterbium heptanickel: a crystal structure redetermination

2014 ◽  
Vol 70 (8) ◽  
pp. i42-i42
Author(s):  
Volodymyr Levytskyy ◽  
Volodymyr Babizhetskyy ◽  
Bohdan Kotur ◽  
Volodymyr Smetana
Keyword(s):  
Crystal Structure ◽  
Diffraction Data ◽  
Title Compound ◽  
Stoichiometric Composition ◽  
Structure Type ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Anisotropic Displacement Parameters

The crystal structure of the title compound, Tb2Ni7, was redetermined from single-crystal X-ray diffraction data. In comparison with previous studies based on powder X-ray diffraction data [Lemaireet al.(1967).C. R. Acad. Sci. Ser. B,265, 1280–1282; Lemaire & Paccard (1969).Bull. Soc. Fr. Mineral. Cristallogr.92, 9–16; Buschow & van der Goot (1970).J. Less-Common Met.22, 419–428], the present redetermination affords refined coordinates and anisotropic displacement parameters for all atoms. A partial occupation for one Tb atom results in the non-stoichiometric composition Tb1.962 (4)Ni7. The title compound adopts the Ce2Ni7structure type and can also be derived from the CaCu5structure type as an intergrowth structure. The asymmetric unit contains two Tb sites (both site symmetries 3m.) and five Ni sites (.m.,mm2, 3m., 3m., -3m.). The two different coordination polyhedra of Tb are a Frank–Kasper polyhedron formed by four Tb and 12 Ni atoms and a pseudo Frank–Kasper polyhedron formed by two Tb and 18 Ni atoms. The four different coordination polyhedra of Ni are Frank–Kasper icosahedra formed by five Tb and seven Ni atoms, four Tb and eight Ni atoms, three Tb and nine Ni atoms, and six Tb and six Ni atoms, respectively.

Crystal structure of fac-Tris(pentane-2,3,4-trione 3-oximato)cobalt(III)

1978 ◽  
Vol 31 (11) ◽  
pp. 2437 ◽  
Author(s):  
BN Figgis ◽  
CL Raston ◽  
RP Sharma ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Bidentate Ligands ◽  
X Ray Diffraction ◽  
X Ray ◽  
Independent Molecules

The crystal structure of the title compound has been determined by single-crystal X-ray diffraction at 295 K and refined by least squares to a residual of 0.058 for 2363 'observed' reflections. Crystals are triclinic, Pī, Z 4, a 15.517(8), b 11.772(7), c 11.282(7) Ǻ, α 112.10(4), β 94.80(3), γ 90.60(4)°. <Co-N, O>| distances are 1.883, 1.925 Ǻ respectively, the disposition of the three bidentate ligands within each of the two independent molecules being fac.

Crystal structure of Tris(ethane-1,2-diamine)nickel(II) diperchlorate monohydrate

1978 ◽  
Vol 31 (2) ◽  
pp. 415 ◽  
Author(s):  
CL Raston ◽  
AH White ◽  
AC Willis
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Diffraction Data ◽  
Structure Determination ◽  
Title Compound ◽  
Thermal Motion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Very High

The crystal structure of the title compound, [Ni(en)3] (ClO4)2,H2O, has been determined from single-crystal X-ray diffraction data at 295(1) K and refined by least squares to a residual of 0.093 for 1400 'observed' reflections. Crystals are orthorhombic, P bca, a 17.043(7), b 15.922(6), c 13.496(5) Ǻ, Z 8. The precision of the structure determination is adversely affected by very high perchlorate thermal motion. <Ni-N> is 2.13 Ǻ.

Crystal structure of tert-butyl-6-methyl 8,9-(1,2-[60]fullereno) tricyclo[3.2.2.02,4] non-6-ene-carboxylate with CHCl3 and hexane solvent at 120 K

1999 ◽  
Vol 214 (7) ◽  
Author(s):  
D. Zobel ◽  
M. Strümpel ◽  
P. Luger ◽  
M. Ramm ◽  
W. Duczek ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Direct Methods ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tert Butyl

AbstractThe crystal structure of the title compound was determined by X-ray diffraction at 120 K and solved by direct methods. The asymmetric unit of the

Crystal structure of 5,9-Dimethoxy-3,3,8-trimethy1-7,10-dihydro-3H-naphtho[ 2,1-b]pyran-7,10-dione

1978 ◽  
Vol 31 (3) ◽  
pp. 685 ◽  
Author(s):  
SR Hall ◽  
CL Raston ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Direct Methods ◽  
X Ray Diffraction ◽  
X Ray

The crystal structure of the title compound, C18H18O5, has been determined by single-crystal X-ray diffraction methods at 295 K and refined by least squares to a residual of 0.058 for 1502 'observed' reflections. Crystals are monoclinic, P 21/n, a 22.048(6), b 7.075(2), c 10.443(3) Ǻ, β 100.40(3)°, Z 4. ��� The structure was solved by a combination of special direct phasing procedures and translation functions, after conventional direct methods had failed.

Crystal structure of sodium trans-bis(ethane-1,2-diamine)disulfitocobaltate(III) trihydrate

1980 ◽  
Vol 33 (3) ◽  
pp. 665 ◽  
Author(s):  
GDRCL Fallon ◽  
AH White ◽  
JK Yandell
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray

The crystal structure of the title compound, Na[Co(en)2(SO3)2],3H2O, has been determined by single-crystal X-ray diffraction at 295(1) K and refined by least squares to a residual of 0.068 for 1890 'observed' reflections. Crystals are monoclinic, P21/c, a 8.481(3), b 13.661(6), c 13.715(6) Ǻ, β 106.91(3)°, Z 4. The asymmetric unit of the structure contains two independent anions, each located about a crystallographic centre of symmetry. (Co-S) is 2.267 Ǻ, the longest Co-S distance so far reported in cobalt(III)/sulfite complexes.

Crystal structure of o-Phenanthrolinebis(thiourea)copper(I) iodide o-phenanthroline: Stereochemistry of [M(bidentate)(unidentate)2] coordination

1977 ◽  
Vol 30 (9) ◽  
pp. 1955 ◽  
Author(s):  
SR Hall ◽  
DL Kepert ◽  
CL Raston ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Least Squares ◽  
Title Compound ◽  
Direct Methods ◽  
X Ray Diffraction ◽  
Coordination Type ◽  
X Ray ◽  
Phenanthroline Ligand

The crystal structure of the title compound, [Cu{CS(NH2)2}2(phen)] I,phen, has been determined by X-ray diffraction with direct methods, and refined by least squares to a residual of 0.043 for 5383 ?observed? reflections. Crystals are triclinic, Pī, a 13.263(8), b 12.449(2), c 10.214(2) Ǻ, α 113.20(2), β 90.16(2), γ 112.72(2)�, Z 2. The coordination about the copper is pseudo-tetrahedral, distorted by the bite of the phenanthroline ligand [Cu-S, 2.295(2), 2.280(1) Ǻ; Cu-N, 2.072(4), 2.089(5) Ǻ, N-Cu-N, 81.0(2)�; S-Cu-S, 117.31(6)�; N-Cu-S, 107.7(11)-117.23(9)�]. In addition the structure provides the first example of the determination of the geometry of the uncoordinated o- phenanthro-line molecule. The stereochemistry of the [M(bidentate)(unidentate)2] coordination type is considered in terms of a repulsion model.

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