Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1409951 | Journal of Molecular Structure | 2010 | 5 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
W. Sawka-Dobrowolska, G. Bator, L. Sobczyk, E. Grech, J. Nowicka-Scheibe, A. Pawlukojć, J. Wuttke,