Infrared spectra of furoyl peroxides and related compounds containing carbonyl

1971 ◽  
Vol 14 (4) ◽  
pp. 480-483
Author(s):  
V. G. Kul'nevich ◽  
N. N. Borisova
Keyword(s):  
Infrared Spectra ◽  
Related Compounds

Carbamylphosphonates and Related Compounds—Nuclear-Magnetic-Resonance and Infrared Spectra

1967 ◽  
Vol 21 (1) ◽  
pp. 9-15 ◽  
Author(s):  
T. H. Siddall ◽  
C. A. Prohaska
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Infrared Spectra ◽  
Proton Magnetic Resonance ◽  
Structural Features ◽  
Slow Rotation ◽  
The Common ◽  
Related Compounds ◽  
Great Evidence ◽  
Nitrogen Bond

Proton magnetic resonance and infrared spectra were obtained for 44 carbamylphosphonates and related compounds, the common structural features being the grouping As with ordinary amides, slow rotation is observed around the carbonyl-to-nitrogen bond, but the chemical shift between nitrogen substituents is three to five times as great. Evidence is presented for long range coupling of phosphorus to protons in N-substituents. Correlations are observed between the carbonyl and phosphoryl stretching frequencies and substituents both on nitrogen and on phosphorus.

Low temperature infrared spectra of some halogen fluorosulfates and related compounds

1976 ◽  
Vol 7 (1-3) ◽  
pp. 245-259 ◽  
Author(s):  
William W. Wilson ◽  
John M. Winfield ◽  
Friedhelm Aubke
Keyword(s):  
Low Temperature ◽  
Infrared Spectra ◽  
Related Compounds

The far-infrared spectra and the ring inversion vibrations of a series of methylenecyclohexanes

1984 ◽  
Vol 62 (8) ◽  
pp. 1565-1572 ◽  
Author(s):  
Hal Wieser ◽  
Tracy L. Smithson ◽  
Nan Ibrahim ◽  
Peter J. Krueger
Keyword(s):  
Infrared Spectra ◽  
Far Infrared ◽  
Chair Conformation ◽  
Ring Inversion ◽  
One Dimensional ◽  
Planar Form ◽  
Out Of Plane ◽  
Minimum Potential ◽  
Related Compounds ◽  
Far Infrared Spectra

The far-infrared spectra in the region of 50 to 400 cm−1 are reported for the vapours of methylenecyclohexane and the related compounds 4-methylenetetrahydro-4H-pyran, 4-methylenetetrahydro-4H-thiopyran and 3-methylenetetrahydro-4H-pyran. The absorptions are assigned to the three out-of-plane deformations of the six-membered rings. The observed series of Q branches are ascribed to combination sequences involving the three modes. The lowest wavenumber sequence in each compound is believed to arise from a vibration which if completely executed would take the chair conformation to its equivalent via an inversion through the planar form. With the use of a one-dimensional Hamiltonian incorporating a quadratic-quartic double minimum potential function, barriers to planarity for the rings are estimated. The similarities between these compounds and the corresponding ketones are discussed.

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