An Infra-Red Study of the Association of Diazoaminobenzene

1960 ◽  
Vol 13 (2) ◽  
pp. 230
Author(s):  
LK Dyall
Keyword(s):  
Hydrogen Bonding ◽  
Equilibrium Constant ◽  
Linear Relation ◽  
Intramolecular Hydrogen Bonding ◽  
Dimer Formation ◽  
Frequency Shifts ◽  
Infra Red ◽  
Intramolecular Hydrogen

The infra-red spectrum of diazoaminobenzene reveals that dimeric association occurs through hydrogen bonding. In tetrachloroethylene solution, the equilibrium constant for dimer formation is found to be 1.2�0.2 1 mol-1. The effects of various solvents on the free N-H stretching frequency have been examined, and the frequency shifts are linearly related to those reported by Bellamy and Hallam (1959) for pyrrole. A linear relation of this type is also found for %nitroaniline, and confirms that there is no significant intramolecular hydrogen bonding in this compound.

Hydrogen Bonding in organic compounds. 1. o-Nitroanilines

1958 ◽  
Vol 11 (4) ◽  
pp. 513 ◽  
Author(s):  
LK Dyall ◽  
AN Hambly
Keyword(s):  
Hydrogen Bonding ◽  
Nitro Group ◽  
Organic Compounds ◽  
Intramolecular Hydrogen Bonding ◽  
Amino Group ◽  
Infra Red ◽  
Sterically Hindered ◽  
Intramolecular Hydrogen

The infra-red spectra of o-nitroanilines do not indicate any intramolecular hydrogen bonding unless there are nitro groups in both positions 2 and 6 to the amino group. An examination of the literature shows that there is no unambiguous evidence from other sources of such bonding in simple o-nitroanilines. An explanation is given of the variation of the stretching frequencies of the nitro group in sterically hindered compounds and in those with electron-donating ortho- and para-substituents.

scholarly journals Studies on Succinic Acids. IV. Evidence for the Existence of Intramolecular Hydrogen Bonding in Certain Highly Alkylated Succinic Acids by Infra-Red Spectra.

1959 ◽  
Vol 13 ◽  
pp. 224-235 ◽  
Author(s):  
Lennart Eberson ◽  
Knut Asbjørn Straumsgard ◽  
Svend E. Hansen ◽  
R. Sömme ◽  
Einar Stenhagen ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Intramolecular Hydrogen Bonding ◽  
Infra Red ◽  
Intramolecular Hydrogen

N-tert-Butyl-N′-[5-cyano-2-(4-methylphenoxy)phenylsulfonyl]urea, a new TXA2receptor antagonist

2013 ◽  
Vol 69 (8) ◽  
pp. 901-903
Author(s):  
Sylvie-Mireille Bambi-Nyanguile ◽  
Peter Mangwala Kimpende ◽  
Bernard Pirotte ◽  
Luc Van Meervelt
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Crystal Packing ◽  
Theoretical Calculations ◽  
Intramolecular Hydrogen Bonding ◽  
Asymmetric Unit ◽  
Dimer Formation ◽  
Compound C ◽  
Structural Database ◽  
Intramolecular Hydrogen

The title compound, C19H21N3O4S, crystallizes in the space groupP2/cwith two molecules in the asymmetric unit. The conformation of both molecules is very similar and is mainly determined by an intramolecular N—H...O hydrogen bond between a urea N atom and a sulfonyl O atom. The O and second N atom of the urea groups are involved in dimer formationviaN—H...O hydrogen bonds. The intramolecular hydrogen-bonding motif and conformation of the C—SO2—NH(C=O)—NH—C fragment are explored and compared using the Cambridge Structural Database and theoretical calculations. The crystal packing is characterized by π–π stacking between the 5-cyanobenzene rings.

Vibrational Spectra of Aminoacetonitrile

1975 ◽  
Vol 53 (19) ◽  
pp. 2183-2188 ◽  
Author(s):  
B. Bak ◽  
E. L. Hansen ◽  
F. M. Nicolaisen ◽  
O. F. Nielsen
Keyword(s):  
Hydrogen Bonding ◽  
Raman Spectrum ◽  
Vibration Analysis ◽  
Normal Vibration ◽  
Intramolecular Hydrogen Bonding ◽  
Intermolecular Hydrogen Bonding ◽  
Frequency Shifts ◽  
Intramolecular Hydrogen ◽  
Normal Vibration Analysis ◽  
Infrared Data

The preparation of pure, stable aminoacetonitrile (1-amino-, 1′-cyanomethane) CH2NH2CN (1) is described. The Raman spectrum, now complete, and a novel infrared spectrum extending over the 50–3600 cm−1 region are reported. A tentative normal vibration analysis is presented and supported by Raman and infrared data from the spectra of CH2NHDCN (2) and CH2ND2CN (3), the interpretation being compatible with Cs symmetry (1 and 3) in accordance with McDonald and Tyler's results from microwave studies of 1, 2, and 3. The predominance of the trans rotamer may be attributed to intramolecular hydrogen bonding but this is too unimportant to influence the vibrational frequencies of gaseous 1, 2, and 3. However, large gas/liquid frequency shifts occur, quite possibly due to intermolecular hydrogen bonding in the liquid phase.

Theoretical study of intramolecular hydrogen bonding and molecular geometry of 2-trifluoromethylphenol

10.1002/jcc.2 ◽  
1996 ◽  
Vol 17 (16) ◽  
pp. 1804-1819 ◽  
Author(s):  
Attila Kov�cs ◽  
Istv�n Kolossv�ry ◽  
G�bor I. Csonka ◽  
Istv�n Hargittai
Keyword(s):  
Hydrogen Bonding ◽  
Theoretical Study ◽  
Molecular Geometry ◽  
Intramolecular Hydrogen Bonding ◽  
Intramolecular Hydrogen
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