紅外光譜ppt課件(編輯修改稿)
2025-02-13 18:33 本頁面
【文章內(nèi)容簡介】 紅外吸收光譜的應(yīng)用 1 有機(jī)化合物的鑒定 標(biāo)準(zhǔn)譜圖集簡介、未知物結(jié)構(gòu)測定 2 定量分析 )22(21 134 ???? nnnU6)28092(21)22(21 134 ?????????? nnnU6)25172(21 ??????UC7H5NO3 ? 作用： 由分子的不飽和度可以推斷分子中含有雙鍵，三鍵，環(huán)，芳環(huán)的數(shù)目，驗證譜圖解析的正確性。例： C9H8O2 CnHm ? ? can be calculated readily from the molecular formula by applying the following rules: Rule 1: Replace all halogens in the molecular formula by hydrogens. Rule 2: Omit oxygens and sulfurs. Rule 3: For each nitrogen, omit the nitrogen and one hydrogen. 122)22( ??????? mnmnExample ? Determine the unsaturation index of a pound with the molecular formula C8H8NOBr. Rule 1: X ? H: C8H9NO Rule 2: omit oxygens: C8H9N Rule 3: For N, omit N and H: C8H8 ? Therefore, n = 8, m = 8 512882 )22( ???????? mn5)2882(21 ?????UCompound A, with molecular formula C6H10, reacts with H2/Ni to give pound B, with molecular formula C6H12. The IR spectrum of pound A is provided. From this information about pound A tell (1)Its unsaturation index(2)The number of rings or bonds (or both) (3)What structural
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