Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - N′-[1-(5-Bromo-2-hydroxyphenyl)ethylidene]isonicotinohydrazide monohydrate
T2 - crystal structure and Hirshfeld surface analysis
AU - Lee, See Mun
AU - Halcovitch, Nathan R.
AU - Jotani, Mukesh M.
AU - Tiekink, Edward R. T.
PY - 2017/4/1
Y1 - 2017/4/1
N2 - In the title isonicotinohydrazide hydrate, C14H12BrN3O2·H2O {systematic name: N′-[(1E)-1-(5-bromo-2-hydroxyphenyl)ethylidene]pyridine-4-carbohydrazide monohydrate}, the central CN2O region of the organic molecule is planar and the conformation about the imine-C=N bond is E. While an intramolecular hydroxy-O-H⋯N(imine) hydrogen bond is evident, the dihedral angle between the central residue and the benzene rings is 48.99(9)°. Overall, the molecule is twisted, as seen in the dihedral angle of 71.79(6)° between the outer rings. In the crystal, hydrogen-bonding interactions, i.e. hydrazide-N-H⋯O(water), water-O-H⋯O(carbonyl) and water-O-H⋯N(pyridyl), lead to supramolecular ribbons along the a-axis direction. Connections between these, leading to a three-dimensional architecture, are mediated by Br⋯Br halogen bonding [3.5366(3)Å], pyridyl-C-H⋯O(carbonyl) as well as weak π-π interactions [inter-centroid separation between benzene rings = 3.9315(12)Å]. The Hirshfeld surface analysis reveals the importance of hydrogen atoms in the supramolecular connectivity as well as the influence of the Br⋯Br halogen bonding.
AB - In the title isonicotinohydrazide hydrate, C14H12BrN3O2·H2O {systematic name: N′-[(1E)-1-(5-bromo-2-hydroxyphenyl)ethylidene]pyridine-4-carbohydrazide monohydrate}, the central CN2O region of the organic molecule is planar and the conformation about the imine-C=N bond is E. While an intramolecular hydroxy-O-H⋯N(imine) hydrogen bond is evident, the dihedral angle between the central residue and the benzene rings is 48.99(9)°. Overall, the molecule is twisted, as seen in the dihedral angle of 71.79(6)° between the outer rings. In the crystal, hydrogen-bonding interactions, i.e. hydrazide-N-H⋯O(water), water-O-H⋯O(carbonyl) and water-O-H⋯N(pyridyl), lead to supramolecular ribbons along the a-axis direction. Connections between these, leading to a three-dimensional architecture, are mediated by Br⋯Br halogen bonding [3.5366(3)Å], pyridyl-C-H⋯O(carbonyl) as well as weak π-π interactions [inter-centroid separation between benzene rings = 3.9315(12)Å]. The Hirshfeld surface analysis reveals the importance of hydrogen atoms in the supramolecular connectivity as well as the influence of the Br⋯Br halogen bonding.
KW - carbohydrazide
KW - crystal structure
KW - halogen bonding
KW - Hirshfeld surface analysis
KW - hydrogen bonding
U2 - 10.1107/S2056989017004790
DO - 10.1107/S2056989017004790
M3 - Journal article
AN - SCOPUS:85017324419
VL - 73
SP - 630
EP - 636
JO - Acta Crystallographica Section E: Crystallographic Communications
JF - Acta Crystallographica Section E: Crystallographic Communications
ER -