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Ring Stretching Vibrations Skeletal Bands

The most characteristic feature of the infrared spectra of all 5-mono- and -di-substituted-amino-l,2,3,4-thiatriazoles is a strong band in the 1540-1590 cm range, which without doubt is due to the C=N and N=N stretching vibrations of the heteroaromatic ring system. Various infrared bands between 889 and 1122 cm have been assigned to skeletal vibrations of the thiatriazole ring and a band... [Pg.283]

The infrared spectra of the cycloproparenes are characterized by a weak band that appears between 1660 and 1690 cm"1 due to a combination of the aromatic double bond stretch with the three-membered ring skeletal vibration. Angular fused cyclo-propa[a]naphthalene (10) has the highest value (1687 cm"1) while for linear 11 it is more usual at 1673 cm"1, and cyclopropa[6]anthracene falls between these at 1678 cm"1. The... [Pg.739]

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Ring vibrations

Rings stretching

Skeletal vibrations

Stretching vibration

Vibrational bands

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