Competing inter­molecular inter­actions in some `bridge-flipped' isomeric phenyl­hydrazones

Ojala, W.H.; Arola, T.M.; Brigino, A.M.; Leavell, J.D.; Ojala, C.R.

doi:10.1107/S0108270112026443

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 12
The molecular packing in (IV)

, showing the R₂¹(6) interaction (dashed lines) between one O atom of the nitro group and both the bridge N—H and C—H groups of a neighbouring molecule. Also shown as a dashed line is the 3.002 (2) Å approach between atom O1 and the N atom of the nitro group of a neighbouring molecule, an interaction in which O1 engages instead of hydrogen bonding with the molecular bridge. For clarity, only the H atoms of the bridge are shown. See Table 7

for contact geometries. [Symmetry codes: (i) −x + $[{5\over 2}]$ , y − $[{1\over 2}]$ , −z + $[{1\over 2}]$ ; (ii) −x + $[{5\over 2}]$ , y + $[{1\over 2}]$ , −z + $[{1\over 2}]$ ; (iii) x − $[{1\over 2}]$ , −y + $[{1\over 2}]$ , z + $[{1\over 2}]$ ; (iv) −x + 2, −y + 1, −z + 1.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 68| Part 7| July 2012| Pages o270-o278

doi:10.1107/S0108270112026443

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