Single bonds infrared stretching frequencies

For example, a C=N double bond is about twice as strong as a C-N single bond, and the CsN triple bond is similarly stronger than the double bond. The infrared stretching frequencies of these groups vary in the same order, ranging from 1100 cm for C-N, to 1660 cm for C=N, to 2220 cm for C=N. 

Carbon monoxide on metals forms the best-studied adsorption system in vibrational spectroscopy. The strong dipole associated with the C-O bond makes this molecule a particularly easy one to study. Moreover, the C-0 stretch frequency is very informative about the direct environment of the molecule. The metal-carbon bond, however, falling at frequencies between 300 and 500 cm1, is more difficult to measure with infrared spectroscopy. First, its detection requires special optical parts made of Csl, but even with suitable equipment the peak may be invisible because of absorption by the catalyst support. In reflection experiments on single crystal surfaces the metal-carbon peak is difficult to obtain because of the low sensitivity of RAIRS at low frequencies [12,13], EELS, on the other hand, has no difficulty in detecting the metal-carbon bond, as we shall see later on. 

In linear alkane alcohols, ethers, and primary and secondary amines we have skeletal vibrations which involve the stretching of C—C, C O, or C—N bonds which individually in CH3—CH3 (992 cm ), CH3 OH (1033 cm" ), and CH3—NH2 (1036 cm 0 have nearly the same frequency in cm" As a result we will have skeletal single bond interaction. When the C—C—O, C—O—C, C—C—N, or C—N—C bonds stretch in an alternating manner a prominant infrared band results. Such is the case during the... 

---