An alternative interpretation of the spectrum as asymmetry doubling of aK=1←1 rotational hot band for a bent geometry is also considered. This latter interpretation is more consistent with the data and predicts a CO2bend angle in the complex forK=1 between 25° and 30°. Linewidths for the...
1544.72 1544.70 1544.70 1540.84 Amide–II (protein NH bend, CN stretch) 1452.13 1455.99 1454.06 1455.99 CH2 bending; lipids & proteins 1400.06 1400.06 1398.13 1396.21 COO symmetric stretching: fatty acids 1313.28 1313.28 1311.35 1309.42 CH3 CH2 stretching: collagen 1240.00 1240.00 1238.07 1238.07 PO2–...
AA. Despite the breadth of IR bands, the IR spectra of molecules are so complex that no 2 compounds with different structures have the same IR spectrum except for optical isomers and certain high molecular weight polymers differing only slightly in molecular weight. IR spectrometers are scanning ...
Chapter 2 FTIR (Fourier transform infrared spectroscopy) 教学目的和要求 通过学习了解红外吸收光谱与分子结构的关系, 能解析红外光谱图。应当掌握: 1、红外光谱产生的条件及吸收峰的位置、峰数、 峰强取决于哪些因素。 2、掌握主要有机物的红外光谱特征、吸收频率与 基团的关系,以及影响吸收频率的一些因素, 能够确...