wavenumber

(redirected from Cm-1)
Also found in: Acronyms.

wave·num·ber (σ),

(wāv'nŭm-bĕr),
The number of waves per centimeter (cm-1), used to simplify the large and unwieldy numbers heretofore used to designate frequency.
See also: wave number.
Farlex Partner Medical Dictionary © Farlex 2012
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References in periodicals archive ?
STPP###P=O (1135.77 cm-1) and P-O (891.19 cm-1 and 734.44 cm-1###[5, 9]
3(a), revealed the characteristic peak of primary amine (N-H) at 3438.27 cm-1 and 3356.27 cm-1 (asymmetric and symmetric stretch, respectively), broad absorption peak at 3264.74 cm-1 disclosed the presence of O-H stretching.
3(b), the overlapped characteristic peak of N-H and O-H stretching at 3361.47 cm-1, and absorption band at 2878.38cm depicted asymmetrical stretching vibrations of C-H.
3(c), showed strong P=O stretching vibrations at 1135.77 cm-1, and P-O stretching at 891.19 cm-1 and 734.44 cm-1.
2) showed major peaks at 2931.41 cm-1 (Acetyl groups), 2866.83 cm-1 (symmetric CH3), 1770.20 cm-1 (vinyl group), and 1055.17 cm-1 (RO strong) [22].
The characteristic m- substituted peak (1764 cm-1) of Diacerein was found in all physical mixtures at 1735- 1765 cm-1.
###Diacerein###3300 cm-1, 3069.20 cm-1, 1764 cm-1, 760.43 cm-1, 703.2 cm-1###COOH, CH, C=O, m-substituted benzene, benzene
###Span 60###2916.75 cm-1,1467.56 cm-1, 1734.65 cm-1, 1000to1200 cm-1###OH, CH3, Cyclic 5-membered ring, aliphatic chain
This compound was obtained as a yellow powder in 70% combined yield, mp 170 177 oC, IR KBr disk):n, 1560 cm-1, 2900 cm-1, 2940 cm-1; 1H-NMR: (CDCl3) d , 2.55 (s, 3H, S- CH3), 2.88 (s, 0.6 x 3H, 9-CH3 ), 7.2-7.6 (multiplet,5H); m/z, 329.
This compound was obtained as a yellow powder in 70% combined yield, mp 170 177 oC, IR (KBr disk):n, 1560 cm-1, 2900 cm-1, 2940 cm-1; 1H-NMR: (CDCl3) d , 2.32 (s, 0.4 x 3H, 5-CH3 ), 2.55 (s, 3H, S- CH3), 7.2-7.6 (multiplet,5H); m/z, 329.
This compound was obtained as a yellow powder in 60% combined yield, mp 116-121oC, IR (KBr disk):n, 1600 cm-1, 2900 cm-1, 2950 cm-1 ; 1H- NMR:( CDCl3) d, 1.38 (t, 3H, CH3), 2.90 (s, 0.5 x 3H, 9-CH3 ) , 3.12 (q, 2H,S-CH2), 7.2-7.6 (multiplet, 5H); m/z, 343.
This compound was obtained as a yellow powder in 60% combined yield, mp 116-121oC, IR (KBr disk):n, 1600 cm-1, 2900 cm-1, 2950 cm-1 ; 1H- NMR:( CDCl3) d, 1.38 (t, 3H, CH3), 2.35 (s, 0.5 x 3H, 5-CH3 ) , 3.12 (q, 2H,S-CH2), 7.2-7.6 (multiplet, 5H); m/z, 343.