کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1238809 968954 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reducing-difference infrared spectral analysis of cis- and trans-configurated lactams
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Reducing-difference infrared spectral analysis of cis- and trans-configurated lactams
چکیده انگلیسی

The conventional (non-polarized) and linear-polarized IR-spectra of 2-pyrrolidone and laurolactam as typical representatives of lactams with cis- and trans-amide configuration, respectively, were studied by means of difference IR-spectroscopy. The application of this method to treatment of the non-polarized IR-spectra permits additional conclusions about the likely self-associates of these compounds dissolved in aprotic solvents. By means of the difference linear-dichroic IR-spectroscopy, a more precise assignment of the characteristic bands of the lactam cis- and trans-peptide forms as well as their stereo structures were accomplished. A comparative analysis with the linear-dichroic IR-spectra of ɛ-caprolactam and caprylolactam, as similar compounds, with cis- and trans-conformation, respectively, was also carried out.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy - Volume 63, Issue 2, February 2006, Pages 491–500
نویسندگان
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