scholarly journals 5,13-Diethyl-10-methyl-8-heptadecanone: A component of post-1976 Kelex 100

1991 ◽  
Vol 56 (10) ◽  
pp. 2203-2208 ◽  
Author(s):  
Hans-Günter Striegel ◽  
Wolfgang Wiegrebe
Keyword(s):  
Double Bond ◽  
Title Compound ◽  
Aldol Condensation ◽  
Bond Hydrogenation

The title compound was prepared by mixed aldol condensation of 2-ethylhexanal and acetone, double bond hydrogenation, aldol autocondensation of the resulting saturated ketone and finel double bond hydrogenation. It is identical with the ketone C22H44O previously isolated from new Kelex 100 which was erroneously assigned a furoquinoline structure.

scholarly journals Crystal structure of (3E)-3-(2,4-dinitrophenoxymethyl)-4-phenylbut-3-en-2-one

2014 ◽  
Vol 70 (9) ◽  
pp. o1051-o1052 ◽  
Author(s):  
Ignez Caracelli ◽  
Stella H. Maganhi ◽  
Paulo J. S. Moran ◽  
Bruno R. S. de Paula ◽  
Felix N. Delling ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Nitro Group ◽  
Benzene Ring ◽  
Torsion Angle ◽  
Title Compound ◽  
Phenyl Ring ◽  
Aromatic Rings ◽  
Compound C ◽  
The One

In the title compound, C17H14N2O6, the conformation about the C=C double bond [1.345 (2) Å] isE, with the ketone moiety almost coplanar [C—C—C—C torsion angle = 9.5 (2)°] along with the phenyl ring [C—C—C—C = 5.9 (2)°]. The aromatic rings are almost perpendicular to each other [dihedral angle = 86.66 (7)°]. The 4-nitro moiety is approximately coplanar with the benzene ring to which it is attached [O—N—C—C = 4.2 (2)°], whereas the one in theorthoposition is twisted [O—N—C—C = 138.28 (13)°]. The molecules associateviaC—H...O interactions, involving both O atoms from the 2-nitro group, to form a helical supramolecular chain along [010]. Nitro–nitro N...O interactions [2.8461 (19) Å] connect the chains into layers that stack along [001].

scholarly journals 1-Methyl-3-phenylthiourea

2014 ◽  
Vol 70 (5) ◽  
pp. o528-o528
Author(s):  
Hou-xiang Su
Keyword(s):  
Double Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Phenyl Isothiocyanate ◽  
Compound C

The title compound, C8H10N2S, was prepared by reaction of methylamine solution, KOH and phenyl-isothiocyanate in ethanol. It adopts asyn-Me andanti-Ph conformation relative to the C=S double bond. The dihedral angle between the N—C(=S)—N thiourea and phenyl planes is 67.83 (6)°. In the crystal, the molecules centrosymmetrical dimers by pairs of N(Ph)—H...S hydrogen bonds. The dimers are linked by N(Me)—H...S hydrogen bonds into layers parallel to (100).

scholarly journals Crystal structure of chlorido[trans-1-(diphenylphosphanethioyl-κS)-2-(diphenylphosphanoyl)ethene]gold(I) dichloromethane hemisolvate

2016 ◽  
Vol 72 (7) ◽  
pp. 1006-1008
Author(s):  
Christina Taouss ◽  
Peter G. Jones
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Title Compound ◽  
Intramolecular Contact ◽  
Linear Coordination

The title compound, [AuCl(C26H22OP2S)]·0.5CH2Cl2, crystallizes with atrans-O—P...P—S geometry of the groups either side of the C=C double bond, which prevents any intramolecular contact between the Au and O atoms. The AuIatom exhibits a nearly linear coordination [Cl—Au—S = 177.55 (4)°]. The molecules associate to form broad ribbons parallel to thecaxisviatwo C—H...O, one C—H...Cl(Au) and one Au...Cl interaction.

scholarly journals 3-Phenyl-N,N,N′,N′-tetramethyl-1-ethyne-1-carboximidamidium bromide

2012 ◽  
Vol 68 (6) ◽  
pp. o1812-o1812 ◽  
Author(s):  
Ioannis Tiritiris ◽  
Willi Kantlehner
Keyword(s):  
Double Bond ◽  
Title Compound ◽  
Triple Bond ◽  
Positive Charge ◽  
Bond Distance ◽  
Double Bond Character ◽  
Acetylenic Bond ◽  
Compound C ◽  
Bond Character

The reaction of 3,3,3-tris(dimethylamino)-1-phenylprop-1-yne with bromine in pentane yields the title compound, C13H17N2 +·Br−. The acetylenic bond distance [1.197 (2) Å] is consistent with a C[triple-bond]C triple bond. The amidinium C=N bonds [1.325 (2) and 1.330 (2) Å] have double-bond character and the positive charge is delocalized between the two dimethylamino groups.

Die Kristallstruktur des Phosphaniminato-Komplexes [TiCl3(NPPh3)•TiCl4]2 / Crystal Structure of the Phosphorane Iminato Complex [TiCl3(NPPh3)•TiCl4]2

1996 ◽  
Vol 51 (9) ◽  
pp. 1359-1362 ◽  
Author(s):  
Frank Weller ◽  
Fritjof Schmock ◽  
Kurt Dehnicke
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Ir Spectroscopy ◽  
Structure Determination ◽  
Title Compound ◽  
Titanium Tetrachloride ◽  
Bond Distance ◽  
Space Group ◽  
Yellow Orange ◽  
Centrosymmetric Dimers

The title compound was prepared from Me3SiNPPh3 and an excess of titanium tetrachloride. It forms yellow-orange crystals, which were characterized by IR spectroscopy and by crystal structure determination. Space group P21/n, Z = 2; lattice dimensions at 20°C: a = 1189.2(1), b - 1718.5(1), c = 1238.1(1) pm, β = 93.363(7)°. The compound forms centrosymmetric dimers in which the titanium atoms are triply and doubly bridged by chlorine atoms to give face- and edgesharing octahedra, respectively. In the linear units [Ti]=N =PPh3 the Ti-N bond distance of 171.6(3) pm corresponds to a double bond.

scholarly journals Tetrakis(2,3,5,5-tetramethylhexen-2-yl)silane

2014 ◽  
Vol 70 (3) ◽  
pp. o376-o376
Author(s):  
Frank Meyer-Wegner ◽  
Michael Bolte ◽  
Hans-Wolfram Lerner
Keyword(s):  
Double Bond ◽  
Title Compound ◽  
Crystal Packing ◽  
Site Symmetry ◽  
Asymmetric Unit ◽  
Special Position ◽  
Compound C ◽  
Butyl Group ◽  
Crystal Density ◽  
Short Contacts

In the title compound, C40H76Si, the Si atom is located on a special position of site symmetry -4. Thus, there is just a quarter of a molecule in the asymmetric unit. The C=C double bonds exhibit atransconfiguration. The Si atom and thetert-butyl group are located on the same side of the plane formed by the C=C double bond and its four substituents. The crystal packing shows no short contacts between the molecules and despite the low crystal density (0.980 Mg m−3), there are no significant voids in the structure.

scholarly journals Methyl 1-[(Z)-2-(benzyloxycarbonyl)hydrazin-1-ylidene]-5-chloro-2-hydroxyindane-2-carboxylate

2014 ◽  
Vol 70 (5) ◽  
pp. o527-o527
Author(s):  
Kun Dong ◽  
Yifeng Wang
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Double Bond ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Compound C ◽  
Important Intermediate

The title compound, C19H17ClN2O5, is an important intermediate for the synthesis of the pesticide Indoxacarb [systematic name: (S)-methyl 7-chloro-2-{[(methoxycarbonyl)[4-(trifluoromethoxy)phenyl]amino]carbonyl}-2H,3H,4aH,5H-indeno[1,2-e][1,3,4]oxadiazine-4a-carboxylate] The C=N double bond has aZconformation. An intramolecular N—H...O hydrogen bond occurs. In the crystal structure, O—H...O hydrogen bonds result in the formation of 12-membered rings lying about inversion centers withR44(12) motifs.

scholarly journals (E)-N′-(4-Isopropylbenzylidene)isonicotinohydrazide monohydrate

2012 ◽  
Vol 68 (4) ◽  
pp. o1002-o1002 ◽  
Author(s):  
Mashooq A. Bhat ◽  
Hatem A. Abdel-Aziz ◽  
Hazem A. Ghabbour ◽  
Madhukar Hemamalini ◽  
Hoong-Kun Fun
Keyword(s):  
Double Bond ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Compound ◽  
Three Dimensional ◽  
Compound C ◽  
Dimensional Network ◽  
Benzene Rings

In the title compound, C16H17N3O·H2O, the isonicotinohydrazide molecule adopts anEconformation about the central C=N double bond. The dihedral angle between the pyridine and the benzene rings is 54.56 (15)°. In the crystal, molecules are connectedviaN—H...O, O—H...N and O—H...O hydrogen bonds, forming a three-dimensional network.

Crystal structure of (Z)-Cembr-4-ene-15,19,20-triol

1977 ◽  
Vol 30 (12) ◽  
pp. 2723 ◽  
Author(s):  
EN Maslen ◽  
CL Raston ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Single Crystal ◽  
Least Squares ◽  
Structure Determination ◽  
Title Compound ◽  
X Ray Diffraction ◽  
Relative Configuration ◽  
Macrocyclic Ring ◽  
X Ray

The crystal structure of the title compound, CZOH3803 [compound (1) in ref.'], has been determined by single-crystal X-ray diffraction at 295(1) K and refined by least squares to a residual of 0.045 for 954 'observed' reflections. Crystals are monoclinic, P2', a 9.281(2), b 17.798(6), c 6.417(1) A, B 93.81(3)", Z 2. The structure determination establishes the relative configuration of the chiral centres within the 14-membered macrocyclic ring and shows the double bond to have the unusual (Z) configuration.

Improved activity and selectivity in carbon-oxygen double bond hydrogenation with Ru/TiO2

1985 ◽  
Vol 29 (2) ◽  
pp. 311-316 ◽  
Author(s):  
A. A. Wismeijer ◽  
A. P. G. Kieboom ◽  
H. van Bekkum
Keyword(s):  
Double Bond ◽  
Bond Hydrogenation
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