Add time:07/17/2019 Source:sciencedirect.com
The molecular structure of 2-N-ethylamino-5-methyl-4-nitropyridine (EN5MP) and its vibrational spectra have been analyzed in terms of quantum chemical DFT calculations (B3LYP/6-311++G(d,p) approaches) and related to the XRD data. The EN5MP crystal is triclinic and centrosymmetric and its unit-cell is built by asymmetric units consisting of two parallelly arranged formula units, 2[C8H11N3O2], of different conformations. In each of the two subunits the methyl carbons and N-atoms of the nitro group are coplanar with the pyridine ring, but the O-atoms are inclined from this plane in the opposite directions. Dimers are linked by intermolecular NH⋯N hydrogen bonds system. Properties of the NAH⋯NP interactions between the hydrogen atom of the pyridine ring NP and the hydrogen atom of the amino group NA have been characterized. Additionally the crystal structure is stabilized by a set of weak intermolecular CH⋯O interactions.
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