红外图谱分析方法大全（Atlas of infrared spectrometry）.docVIP

红外图谱分析方法大全（Atlas of infrared spectrometry） Resolution of infrared spectrogram Analysis of infrared spectra (1) firstly, according to the spectra, the type of compound carbon framework is deduced, and the unsaturation is calculated according to the molecular formula. Formula: non saturation = F+1+ (T-O) /2 Among them: F: valence atomic number 4 valence (C atoms); T: valence atomic number 3 valence (N atoms); O: the number of atoms of 1 valence valence (H atoms). F, T, and O are the initials of English 4,3 1, so you wont forget it For example, for example, benzene (C6H6), unsaturation = 6+1+ (0-6), /2 = 4, 3 double bonds, plus a ring, exactly 4 Degree of unsaturation. (2) analyzing the 3300~2800cm^-1 region Regional region Regional C-H extension Stretch Stretching vibration absorption Shrinkage vibration absorption absorption vibration absorption Contraction vibration absorption, ,, In order to. In order to Take 3000 cm^-1 as the boundary Bounded For the world, ,, Higher than Higher than Higher than 3000cm^-1 Unsaturated carbon Unsaturated carbon is unsaturated carbon Stretching vibration absorption of unsaturated carbon C-H Telescopic vibration, absorption, expansion, vibration absorption Stretching vibration absorption, ,, There may be ene It is possible that ene is possible It could be ene, ,, And alkynes Alkyne alkyne Alkyne, ,, Aromatic compounds Aromatic compounds Aromatic compounds? Do you You, ,, And below Below but below Below 3000cm^-1 General general commonly Saturation Saturation is saturation Saturable vibration absorption for saturated C-H Telescopic vibration, absorption, expansion, vibration absorption Stretching vibration absorption. .. . (3) if it is slightly higher than At a slightly higher than, if slightly above If absorbed at slightly higher than 3000cm^-1 Absorption and absorption Absorption, ,, It should be Should be in, should be in It should be in the 2250~1450cm^-1 frequency band Frequency region Frequency domain analysis of unsaturated carb