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有羟基存在的羧酸在红外图谱中会在什么位置
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有羟基存在时候会不会影响羰基的红外吸收峰，如果影响，那么会向长波还是短波方向呢？ 酯间的羰基吸收峰在哪里呢？有多个羟基存在时候呢？ 希望高手指点一下吧，我自己学的都很忘的七七八八了，上百度上搜好象答案不是很明确． |
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5楼2008-04-17 09:02:11
2楼2008-04-16 21:52:47
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给你介绍个网站，小日本做的免费谱图库SDBS(http://riodb01.ibase.aist.go.jp/ ... index.cgi?lang=eng)，搜相近的物质，对照即可！有羟基和羧基注意下有无氢键缔合！ 下面是其介绍，不是广告，而是我一直用！ 【数据库研制者】 National Institute of Materials and Chemical Research (NIMC) Tsukuba, Ibaraki 305-8565, Japan NMR: K.Hayamizu, M.Yanagisawa and O.Yamamoto MS: N.Wasada ESR: K.Someno IR: K.Tanabe and T.Tamura Raman: K.Tanabe and J.Hiraishi 【数据内容】 SDBS is an integrated spectral database system for organic compounds, which includes 6 different types of spectra under a directory database of the compounds. The spectra are EI mass, 1H decoupled 13C NMR, 1H NMR pattern (90 and/or 400 MHz), 1H NMR parameter (300 MHz pattern generated), FT-IR, laser-Raman, and ESR. We started the studies on the spectral database system in early 1970. The construction of the database in the present format was started in 1982 in a main-frame computer which was finished at the end of March, 1999. At present, the activities to add new data and update the previous data are still continuing using WS or PC. The numbers of the data for each type of spectra at the end of March, 1999 are as follows. MS (ca 19,600 spectra) 13C NMR (ca 11,000 spectra) Compound Dictionary 1H NMR (ca 13,500 spectra) (30,000 compounds) IR (ca 47,300 spectra) Raman (ca 3,500 spectra) ESR (ca 2,000 spectra) Most of the spectra are measured in their Institute. The master files of the MS, 1H NMR-pattern, IR and Raman spectra are constructed by direct transfer of the digital data from the spectrometers. All the databases contain the spectral patterns. The compounds are mainly obtained from commercial sources and two thirds of the organic compounds in SDBS have between 6 and 16 carbon atoms. Many compounds were gifts from Tokyo Kasei Kogyo Co., Tokyo. 【备注】 users not allowed to download more than 50 spectra and/or compound structure files in one day. when the database data is used in a publication or presentation, a proper acknowledgement should be given such as: SDBSWeb: http://riodb.aist.go.jp/SDBS/ (access date) |
3楼2008-04-16 23:01:00
4楼2008-04-17 08:24:55
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