The appearance of the NH group valence vibrations in the infrared spectra of carboxylic acid hydrazides

1972 ◽  
Vol 16 (2) ◽  
pp. 275-276
Author(s):  
S. V. Laptii ◽  
T. B. Lutsenko ◽  
V. N. Vatulev ◽  
A. P. Grekov ◽  
V. Ya. Veselov
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Group Valence

Some studies in inorganic complexes. XXV. Cobalt(II) and nickel(II) complexes of 2-Acetamidopyridine and 2-Aminomethyl-6-rnethylpyridine, and the cobalt(II) complex of 2-Methylpyridine-6-carboxylic acid

1969 ◽  
Vol 22 (9) ◽  
pp. 1841 ◽  
Author(s):  
KH Shaw ◽  
GJ Sutton
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Absorption Spectra ◽  
Infrared Spectra ◽  
Reflectance Spectra ◽  
Inorganic Complexes

Complexes of cobalt(II) and nickel(II) with the ligands 2- acetamidopyridine (acpy) and 2-aminomethyl-6-methylpyridine (mepic) have been prepared and studied. They included [Co(acpy)2X2], [Co(mepic)2X2], [Ni(acpy)2X2], and [Ni-(mepic)2X2], in which X is Cl, Br, I, or NCS; [Co(acpy)2(NO3)2], [Co(mepic)2(NO3)2], [Ni(acpy)2(NO3)2], [Ni(mepic)3NO3]NO3, [Co(acpy)3](ClO4)2, [Co(mepic)3](ClO4)2, [Co(mepic)3](CoCl4), [Ni(acpy)2(H2O)2](ClO4)2, and [Ni(mepic)2(H2O)2](ClO4)2. The inner complex of 2-methylpyridine-6- carboxylic acid [Co(mepiac)2,2H2O)] was also isolated. In all cases, the magnetic properties, conductances, reflectance spectra, absorption spectra, and infrared spectra are in agreement with the concept that they are spin-free, six-coordinate octahedral complexes. The substance [Ni(mepic)2NO3]NO3 contains both bidentate and ionic nitrate.

Medium and temperature effects on the infrared spectra and structure of carboxylic acid–pyridine complexes: acetic acid

1999 ◽  
Vol 477 (1-3) ◽  
pp. 127-141 ◽  
Author(s):  
N.V. Drichko ◽  
G.Yu. Kerenskaia ◽  
V.M. Schreiber
Keyword(s):  
Acetic Acid ◽  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Temperature Effects ◽  
Pyridine Complexes

Infrared spectra of H-bonded systems: saturated carboxylic acid dimers

1972 ◽  
Vol 28 (2) ◽  
pp. 269-283 ◽  
Author(s):  
P. Excoffon ◽  
Y. Marechal
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra

Some studies in inorganic complexes. XXIV. Copper(II) complexes of 2-acetamidopyridine and 2-methylpyridine-6-carboxylic acid

1969 ◽  
Vol 22 (9) ◽  
pp. 1835 ◽  
Author(s):  
KH Shaw ◽  
GJ Sutton
Keyword(s):  
Magnetic Properties ◽  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Coordinate Structure ◽  
Inorganic Complexes ◽  
Methyl Pyridine

Complexes of copper(II) with 2-acetamidopyridine (acpy) and with 2- methyl-pyridine-6-carboxylic acid (mepiac-H) have been prepared. The compounds studied included [Cu(acpy)2Cl2], [Cu(acpy)2Br2], [Cu(acpy)2(NCS)2], [Cu(acpy)2(NO3)2], [Cu(acpy)2(H2O)ClO4]ClO4,H2O, [Cu(mepiac)(mepiac-H)Cl], [Cu(mepiac)(mepiac-H)-Br], [Cu(mepiac)(mepiac-H)BrH2O], and [Cu(mepiac)2H2O]. The magnetic properties, conductances, reflectance and solution spectra, as well as infrared spectra, are in agreement with the copper(II) complexes of acpy being six-coordinate and those of mepiac-H having a five- coordinate structure.

scholarly journals Infrared Spectra of Pyrazine-and Pyridine-carboxylic Acid and Their Derivatives.

1959 ◽  
Vol 7 (2) ◽  
pp. 162-171 ◽  
Author(s):  
Shigeru Yoshida ◽  
Motoji Asai
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Pyridine Carboxylic Acid ◽  
Pyridine Carboxylic

THE INFRARED SPECTRA OF HUMIC ACIDS AND RELATED MATERIALS

1957 ◽  
Vol 35 (8) ◽  
pp. 926-931 ◽  
Author(s):  
R. M. Elofson
Keyword(s):  
Carboxylic Acid ◽  
Humic Acids ◽  
Infrared Spectra ◽  
Bituminous Coal ◽  
Wave Length ◽  
Potassium Bromide ◽  
Low Rank ◽  
Acidic Properties ◽  
Long Wave ◽  
Degree Of Condensation

The infrared spectra of a number of humic acids and related materials obtained by the potassium bromide pressed pellet technique are summarized. Acidic properties of humic acids are largely due to clearly defined carboxylic acid frequencies at 3.9 μ and 5.8 to 5.85 μ. These bands are shifted in the expected manner by preparation of the sodium salts. Autoclaving of humic acids from lignite and from hydroquinone removes the carboxylic acid bands and produces material having bands in the long wave-length region that are at the same position as bands shown by bituminous coal and autoclaved cellulose. The potassium bromide technique has also revealed in the infrared spectra of low rank material a band at 6.65 μ which decreases markedly with increase in rank and may be related to the degree of condensation of aromatic nuclei.

Infrared Spectra of Some Carboxylic Acid Derivatives

1949 ◽  
Vol 71 (3) ◽  
pp. 1073-1079 ◽  
Author(s):  
Robert S. Rasmussen ◽  
R. Robert. Brattain
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra

Enhanced infrared spectra of azobenzene carboxylic acid LB monolayer on discontinuous silver film

1997 ◽  
Vol 278 (4-6) ◽  
pp. 220-224 ◽  
Author(s):  
Jiang Zhao ◽  
Jin Zhang ◽  
Hui-Xin He ◽  
Hu-Lin Li ◽  
Zhong-Fan Liu
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Silver Film

CARBOXYL AND PHENOLIC HYDROXYL GROUPS IN SOME ORGANIC SOILS AND THEIR RELATION TO THE DEGREE OF HUMIFICATION

1965 ◽  
Vol 45 (3) ◽  
pp. 257-264 ◽  
Author(s):  
M. Schnitzer ◽  
J. G. Desjardins
Keyword(s):  
Carboxylic Acid ◽  
Infrared Spectra ◽  
Colorimetric Method ◽  
Organic Soil ◽  
Soil Samples ◽  
Phenolic Hydroxyl ◽  
Total Carbon ◽  
Organic Soils ◽  
Hydroxyl Groups ◽  
Phenolic Hydroxyl Groups

The degree of humification of 17 organic soil samples was determined by the pyrophosphate test of Dawson as described by MacLean et al. (5) and the colorimetric method of Kaila (4). The latter procedure, although more laborious, was preferred because of good replication and exclusion of the personal judgment of an observer.Treatment with HCl–HF solution resulted in a significant reduction in the ash content of most samples; concomitant losses of organic matter were less than 5%. The main effect of the HCl–HF treatment was to free carboxyl groups. By contrast, phenolic hydroxyl groups remained apparently unaffected. Carboxyls appeared to be the most reactive groups in these organic soil samples. Infrared spectra of untreated peats and of mucky peats exhibited bands at 1720 cm−1, indicative of the presence of free carboxylic acid groups. These bands were absent in the spectra of mucks. After the acid treatment, however, infrared spectra of mucks showed new strong bands at 1720 cm−1 and decreased absorption at 1625 cm−1, apparently due to the conversion of carboxylate to carboxylic acid groups.The total carbon, hydrogen, sulphur, and oxygen contents were similar for all samples, but peats and mucky peats tended to contain less total nitrogen than mucks.

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