Conformations and resulting hydrogen-bonded networks of hydrogen {phosphono­[(pyridin-1-ium-3-yl)amino]­meth­yl}phospho­nate and related 2-chloro and 6-chloro derivatives

Matczak-Jon, E.; Ślepokura, K.

doi:10.1107/S0108270111040650

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 4
The arrangement of the zwitterions in (a) (Ib)

and (b) (II)

within the layers parallel to the (100) and (001) planes, respectively. O—H⋯O and N—H⋯O hydrogen bonds are shown as dashed lines. H atoms not involved in hydrogen bonding have been omitted for clarity. [Symmetry codes for (Ib)

: (i) x, −y + $[{1\over 2}]$ , z − $[{1\over 2}]$ ; (ii) x, y, z + 1; (iii) −x + 2, −y + 1, −z + 1; (iv) x, −y + $[{1\over 2}]$ , z + $[{1\over 2}]$ ; symmetry codes for (II)

: (i) x + 1, y, z; (ii) −x + 1, −y + 2, −z + 1; (iii) −x + 1, −y + 1, −z + 1.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 67| Part 11| October 2011| Pages o450-o456

doi:10.1107/S0108270111040650

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