Vibrational Spectroscopy of Secondary Amine Salts: 1. Assignment of NH2+Stretching Frequencies in Crystalline Phases

2009 ◽  
Vol 113 (49) ◽  
pp. 15914-15920 ◽  
Author(s):  
Guinevere A. Giffin ◽  
Scott Boesch ◽  
Dharshani N. Bopege ◽  
Douglas R. Powell ◽  
Ralph A. Wheeler ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Secondary Amine ◽  
Crystalline Phases ◽  
Amine Salts

Synthesis of N4-Substituted Derivatives of 1-[2-(Phosphonomethoxy)ethyl]cytosine and Its Diisopropyl Ester as a Model Reaction for the Synthesis of N4-Substituted Derivatives of Cidofovir

2005 ◽  
Vol 70 (12) ◽  
pp. 2066-2074 ◽  
Author(s):  
Šárka Chalupová ◽  
Antonín Holý ◽  
Milena Masojídková
Keyword(s):  
Secondary Amine ◽  
Model Reaction ◽  
Aqueous Methanol ◽  
Derivatives Of ◽  
Amine Salts

We have studied the reaction of 1-[2-(phosphonomethoxy)ethyl]cytosine (1) and its diisopropyl ester (2) with triethylammonium hydrogensulfite in 60% aqueous methanol. In the presence of some primary or secondary amine salts, at 25-70 °C, this reaction affords transaminated derivatives 4a-4e and 5a, 5b as main products accompanied by uracil compounds. However, with certain amines the reaction failed.

Secondary Amine Salts of Some Thiophenols

1950 ◽  
Vol 72 (9) ◽  
pp. 4281-4281 ◽  
Author(s):  
Gerald F. Grillot ◽  
Thomas J. Brooks
Keyword(s):  
Secondary Amine ◽  
Amine Salts

Conformation of the cycloalkanes C14H28, C16H32, and C22H44 in the liquid and high-temperature crystalline phases by vibrational spectroscopy

1989 ◽  
Vol 111 (6) ◽  
pp. 1947-1958 ◽  
Author(s):  
V. L. Shannon ◽  
H. L. Strauss ◽  
Robert G. Snyder ◽  
C. A. Elliger ◽  
W. L. Mattice
Keyword(s):  
High Temperature ◽  
Vibrational Spectroscopy ◽  
Crystalline Phases

THE STRUCTURE OF PYRROLE SALTS AND THE BASIC STRENGTHS OF SOME SIMPLE PYRROLES

1958 ◽  
Vol 36 (12) ◽  
pp. 1686-1690 ◽  
Author(s):  
E. Bullock
Keyword(s):  
Secondary Amine ◽  
Infrared Spectra ◽  
Spectroscopic Data ◽  
Free Base ◽  
Substituted Pyrroles ◽  
Amine Salts

The infrared spectra of hydrohalide salts of some substituted pyrroles are typical of secondary amine salts. Unlike the free base, cryptopyrrole hydrochloride is easily hydrogenated. The basic strengths of cryptopyrrole and 2,4-dimethylpyrrole are calculated from ultraviolet spectroscopic data.

scholarly journals Vibrational spectroscopy of GdCr3(BO3)4: quantitative separation of crystalline phases

2016 ◽  
Vol 737 ◽  
pp. 012035 ◽  
Author(s):  
E A Dobretsova ◽  
K N Boldyrev ◽  
M N Popova ◽  
V A Chernyshev ◽  
E Yu Borovikova ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Crystalline Phases ◽  
Quantitative Separation

THE INFRARED SPECTRA OF SECONDARY AMINES AND THEIR SALTS

1956 ◽  
Vol 34 (12) ◽  
pp. 1782-1795 ◽  
Author(s):  
R. A. Heacock ◽  
Léo Marion
Keyword(s):  
Amino Acids ◽  
Secondary Amine ◽  
Infrared Spectra ◽  
Secondary Amines ◽  
Amino Group ◽  
Absorption Bands ◽  
Secondary Amino ◽  
Amine Salts

The infrared spectra of a number of secondary bases and of their salts have been examined. The spectra of the salts differ from those of the corresponding bases in containing several absorption bands that are absent from the latter. Those of the new bands occurring in the region 1620 to 1560 cm.−1, which are due to NH2+ deformation vibrations, are characteristic of secondary amine salts, and can be used to detect the presence of a secondary amino group in the original molecule. With aromatic bases the spectra are complicated because the ring absorption occurs in the same region, but in many cases the assignment can still be made, although with less certainty. In zwitterionic substances such as the secondary aliphatic amino acids, the function is more difficult to detect.

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