New Polydiacetylenes with Visible Chromophoric Side Groups

1997 ◽  
Vol 488 ◽  
Author(s):  
James L. Foley ◽  
Venkataramani Shivshankar ◽  
Daniel J. Sandman
Keyword(s):  
Raman Spectra ◽  
Powder Diffraction ◽  
X Ray ◽  
Derivatives Of

AbstractIn the interest of obtaining crystalline polydiacetylene with absorption at longer wavelengths, new derivatives of 2,4-hexadiyne with planar, visible absorbing aromatic chromophores have been designed, synthesized, and thermally polymerized. The resulting polymers have a red shifted maximum with absorption extending to the infrared. Their Raman spectra show the usual polydiacetylene ene-yne structure, and X-ray powder diffraction reveals that the new polymers are crystalline.

Powder diffraction investigations of some derivatives of benzophenone: Monomers for synthesis of new polyurethanes

2007 ◽  
Vol 22 (3) ◽  
pp. 259-267
Author(s):  
E. Olszewska ◽  
S. Pikus ◽  
A. Kultys ◽  
P. Wolski
Keyword(s):  
Powder Diffraction ◽  
Unit Cell ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Derivatives Of

Four aliphatic-aromatic diols with ether linkages [4, 4′-Bis(2-hydroxyethoxy)benzophenone, 4, 4′-Bis(3-hydroxypropoxy)benzophenone, 4, 4′-Bis(6-hydroxyhexyloxy)benzophenone, 4, 4′-Bis(11-hydroxyundecyloxy)benzophenone] and two aliphatic-aromatic diols with sulfur linkages [4, 4′-Bis[(2-hydroxyethyl)thio]benzophenone, 4, 4′-Bis[(3-hydroxypropyl)thio]benzophenone] have been characterized by X-ray powder diffraction. These diols can be used for synthesis of thermoplastic nonsegmented polyurethanes. Experimental 2θ peaks positions, relative peak intensities, values of d, and Miller indices as well as unit-cell parameters are presented.

Molecular and crystalline structures of three (S)-4-alkoxycarbonyl-2-azetidinones containing long alkyl side chains from synchrotron X-ray powder diffraction data

2009 ◽  
Vol 65 (6) ◽  
pp. 724-730 ◽  
Author(s):  
Luis E. Seijas ◽  
Asiloé J. Mora ◽  
Gerzon E. Delgado ◽  
Francisco López-Carrasquero ◽  
María E. Báez ◽  
...  
Keyword(s):  
Powder Diffraction ◽  
Diffraction Data ◽  
Density Functional ◽  
Rietveld Method ◽  
Powder Diffraction Data ◽  
Functional Theory ◽  
X Ray ◽  
Alkyl Side Chains ◽  
Derivatives Of ◽  
Average Bond

The (S)-4-alkoxo-2-azetidinecarboxylic acids are optically active β-lactam derivatives of aspartic acid, which are used as precursors of carbapenem-type antibiotics and poly-β-aspartates. The crystal structures of three (S)-4-alkoxo-2-azetidinecarboxylic acids with alkyl chains with 10, 12 and 16 C atoms were solved using parallel tempering and refined against the X-ray powder diffraction data using the Rietveld method. The azetidinone rings in the three compounds display a pattern of asymmetrical bond distances and an almost planar conformation; these characteristics are compared with periodic solid-state, gas-phase density-functional theory (DFT) calculations and MOGUL average bond distances and angles from the CSD. The compounds pack along [001] as corrugated sheets separated by approximately 4.40 Å and connected by hydrogen bonds of the type N—H...O.

New powder diffraction data of some N-derivatives of 4-chloro-3,5-dimethylphenoxyacetamide-potential pesticides

2011 ◽  
Vol 26 (4) ◽  
pp. 337-345
Author(s):  
E. Olszewska ◽  
B. Tarasiuk ◽  
S. Pikus
Keyword(s):  
Organic Compounds ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Powder Diffraction Data ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Derivatives Of

N-derivatives of 4-chloro-3,5-dimethylphenoxyacetamide—2-(4-chloro-3,5-dimethylphenoxy)-N-(4-fluorophenyl)acetamide, 2-(4-chloro-3,5-dimethylphenoxy)-N-(3-chloro-4-fluorophenyl) acetamide, 2-(4-chloro-3,5-dimethylphenoxy)-N-[4-chloro-3-(trifluoromethyl)phenyl] acetamide, 2-(4-chloro-3,5-dimethylphenoxy)-N-[3-chloro-4-methylphenyl]acetamide, 2-(4-chloro-3,5-dimethylphenoxy)-N-(2,4,6-tribromophenyl) acetamide, 2-(4-chloro-3,5-dimethylphenoxy)-N-pyridin-2-ylacetamide, 1-[(4-chloro-3,5-dimethylphenoxy)acetyl]-4-methylpiperazine, and 1-benzyl-4-[(4-chloro-3,5-dimethylphenoxy)acetyl]piperazine—have been characterized by X-ray powder diffraction. These organic compounds are potential pesticides. Experimental 2θ peak positions, relative peak intensities, values of d and Miller indices, and unit-cell parameters are presented.

Physico-Chemical Characterization of Some 5,5-Disubstituted-1,3-Dixanthyl Barbituric Acids

1967 ◽  
Vol 21 (4) ◽  
pp. 225-231 ◽  
Author(s):  
B. C. Flann ◽  
J. A. R. Cloutier
Keyword(s):  
Experimental Data ◽  
Powder Diffraction ◽  
Infrared Spectra ◽  
Chemical Characterization ◽  
Melting Points ◽  
X Ray ◽  
Physico Chemical ◽  
Diffraction Patterns ◽  
Derivatives Of

The dixanthyl derivatives of 21 clinically important barbituric acids have been prepared. Melting points, infrared spectra, and x-ray powder-diffraction patterns of the purified compounds are presented. Infrared evidence is used to discuss the position of the linkage between the xanthyl and barbiturate portions of the derivatives. The experimental data should prove of particular value for the microchemical identification of barbiturates.

New powder diffraction data of some derivatives of N-alkyl (aryl)-2,4-dichlorophenoxyacetamide—New potential pesticides

2008 ◽  
Vol 23 (4) ◽  
pp. 338-349 ◽  
Author(s):  
E. Olszewska ◽  
S. Pikus ◽  
B. Tarasiuk
Keyword(s):  
Organic Compounds ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Unit Cell ◽  
Powder Diffraction Data ◽  
Unit Cell Parameters ◽  
Alkyl Aryl ◽  
X Ray ◽  
Cell Parameters ◽  
Derivatives Of

Four new derivatives of N-aryl-2,4-dichlorophenoxyacetamide, 2-(2,4-dichlorophenoxy)-N-(4-fluorophenyl)acetamide, N-(4-bromophenyl)-2-(2,4-dichlorophenoxy)acetamide, N-[4-chloro-3-(trifluoromethyl)phenyl]-2-(2,4-dichlorophenoxy)acetamide, and N-(3-chloro-4-fluorophenyl)-2-(2,4-dichlorophenoxy)acetamide, and two of N-alkyl-2,4-dichlorophenoxyacetamide, N-dodecyl-2,4-dichlorophenoxy-acetamide and 2-(2,4-dichlorophenoxy)-N-hexadecylacetamide, have been characterized by X-ray powder diffraction. These organic compounds are potential pesticides. Experimental 2θ peaks positions, relative peak intensities, values of d and Miller indices, and unit cell parameters are presented.

Crystal data and X-ray powder diffraction data of two derivatives of 4-chloro-2,2′-iminodibenzoic acid: diethyl 4-chloro-2,2′-iminodibenzoate, C18H18ClNO4, and dimethyl 4-chloro-2,2′-iminodibenzoate, C16H14ClNO4

1998 ◽  
Vol 13 (3) ◽  
pp. 175-177
Author(s):  
Héctor Novoa de Armas ◽  
Armando Paneque Quevedo ◽  
José Antonio Henao Martínez
Keyword(s):  
Powder Diffraction ◽  
Crystal Data ◽  
Space Group ◽  
X Ray ◽  
Cell Dimensions ◽  
The One ◽  
Unit Cell Dimensions ◽  
Derivatives Of ◽  
Monoclinic Cell ◽  
Good Agreement

Two derivatives of 4-chloro-2,2′-iminodibenzoic acid: diethyl 4-chloro-2,2′-iminodibenzoate, C18H18ClNO4, and dimethyl 4-chloro-2,2′-iminodibenzoate C16H14ClNO4, have been investigated by means of X-ray powder diffraction. The unit cell dimensions were determined from diffractometer methods, using monochromatic CuKα1 radiation, and evaluated by indexing programs. The monoclinic cell found for diethyl 4-chloro-2,2′-iminodibenzoate was a=21.332(3) Å, b=7.889(2) Å, c=10.156(2) Å, β=91.43(1)°, Z=4, space group P2 (No. 3), Pm (No. 6), or P2/m (No. 10), Dx=1.351 mg/m3. The cell found for this compound is in good agreement with the one obtained from single crystal X-ray diffractometry. The monoclinic cell found for dimethyl 4-chloro-2,2′-iminodibenzoate has the dimensions a=15.962(2) Å, b=5.151(2) Å, c=12.590(2) Å, β=98.35(1)°. Z=4, space group P2 (No. 3), Pm (No. 6), or P2/m (No. 10), Dx=2.073 mg/m3.

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