2,4-Dinitrophenylhydrazones of 2,4-dihydroxybenzaldehyde, 2,4-dihydroxyacetophenone and 2,4-dihydroxybenzophenone
作者:Russell G. Baughman、Kenneth L. Martin、Rajendra K. Singh、James O. Stoffer
DOI:10.1107/s0108270103027197
日期:2004.2.15
In 2,4-dihydroxybenzaldehyde 2,4-dinitrophenylhydrazone N,N-dimethylformamide solvate or 4-[(2,4-dinitrophenyl)-hydrazonomethyl]benzene-1,3-diol N,N-dimethylformamide solvate}, C13H10N4O6.C3H7NO, (X), 2,4-dihydroxyacetophenone 2,4-dinitrophenylhydrazone N,N-dimethylformamide solvate (or 4-1-[(2,4-dinitrophenyl)hydrazono]ethyl}-benzene-1,3-diol N,N-dimethylformamide solvate), C14H12N4O6.C3H7NO, (XI), and 2,4-dihydroxybenzophenone 2,4-dinitrophenylhydrazone N,N-dimethylacetamide solvate (or 4-[(2,4-dinitrophenyl)hydrazono]phenylmethyl}benzene-1,3-diol N,N-dimethylacetamide solvate), C19H14N4O6.C4H9NO, (XII), the molecules all lack a center of symmetry, crystallize in centrosymmetric space groups and have been observed to exhibit non-linear optical activity. In each case, the hydrazone skeleton is fairly planar, facilitated by the presence of two intramolecular hydrogen bonds and some partial N-N double-bond character. Each molecule is hydrogen bonded to one solvent molecule.