کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1409951 | 1501839 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The (2:1) complex of picric acid with tetramethylpyrazine: The structure, IR spectra and tunnel splitting of methyl groups
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
The crystal structure of 2:1 picric acid (PAH) with tetramethylpyrazine (TMP) was determined by using X-ray diffraction studies. Two equivalent +NH⋯O− hydrogen bonds are formed with the length of 2.601 Å (calculated 2.640 Å). In the IR spectra very broad doublet at ca. 2000 and 2400 cm−1 is observed, which can be interpreted as due to symmetric and asymmetric +NH vibrations. In neutron backscattering two tunnel splittings are observed, in agreement with the symmetry of 2:1 assemblies. At 4 K the tunnel peaks are located at 3.17 and 4.24 μeV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 975, Issues 1–3, 30 June 2010, Pages 298–302
Journal: Journal of Molecular Structure - Volume 975, Issues 1–3, 30 June 2010, Pages 298–302
نویسندگان
W. Sawka-Dobrowolska, G. Bator, L. Sobczyk, E. Grech, J. Nowicka-Scheibe, A. Pawlukojć, J. Wuttke,