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Figure 7
Hydrogen-bonded chains in the crystal structures of (a) SQABPY-I [P21/n form; Cambridge Structural Database (CSD) refcode HAZFAP01; Martins et al., 2009BB40] and (b) SQABPY-II (C2/c form; CSD refcode HAZFAP07; Martins et al., 2009BB40), showing the differing protonation states (orange asterisks) and molecular torsions of bi­pyridine rings (green lines). Hydrogen bonds are drawn as dashed cyan lines.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 54| Part 5| October 2021| Pages 1349-1359
https://doi.org/10.1107/S1600576721007469
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