Determination of the degree of branching in alkanes by infrared spectroscopy. II. Variation of the intensity of the antisymmetrical stretching vibration bands of C-H bonds in CH3 and CH2 groups

1967 ◽  
Vol 32 (5) ◽  
pp. 1903-1912 ◽  
Author(s):  
R. Řeřicha ◽  
P. Jarolímek ◽  
M. Horák
Keyword(s):  
Infrared Spectroscopy ◽  
Degree Of Branching ◽  
Stretching Vibration

High-Resolution Vibrational Spectra of Furazan IV. The Aj Fundamental v2 at ~ 1418 cm-1 from Fourier-Transform Infrared Spectroscopy

1993 ◽  
Vol 48 (5-6) ◽  
pp. 692-698
Author(s):  
Otto L. Stiefvater ◽  
Stefan Klee
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Excited State ◽  
High Resolution ◽  
Band Origin ◽  
Asymmetric Rotor ◽  
Stretching Vibration ◽  
Ft Ir ◽  
Microwave Data

Abstract The band origin of the A1 mode v2 , which represents the symmetrical stretching vibration of the two C = N bonds of furazan, has been determined from the high-resolution FT-IR band as v20 = 1418.4724± 0.0001 cm-1. The rotational parameters of this excited state, as determined in a preceding DRM microwave study, have been confirmed and their precision was raised through the combined fit of microwave data and of some 2500 rovibrational transitions.The use of conjugate low-J Q-branch lines for the determination of the origin of a B-type IR band of an asymmetric rotor is illustrated.

Near Infrared Spectroscopy Used in Purification and Determination of Pharmaceutical Cocrystal

2013 ◽  
Vol 41 (12) ◽  
pp. 1928
Author(s):  
Zong-Liang CHI ◽  
Miao-Miao WANG ◽  
Xiao-Dong CONG ◽  
Shao-Guang LIU ◽  
Bao-Chang CAI
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Pharmaceutical Cocrystal
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