A long symmetric N⋯H⋯N hydrogen bond in bis-(4-amino-pyridinium)(1+) azide(1-): redetermination from the original data
Status PubMed-not-MEDLINE Jazyk angličtina Země Velká Británie, Anglie Médium electronic-ecollection
Typ dokumentu časopisecké články
PubMed
28932471
PubMed Central
PMC5588577
DOI
10.1107/s2056989017011537
PII: hb7695
Knihovny.cz E-zdroje
- Klíčová slova
- Cambridge Structural Database, crystal structure, hydrogen bonding, redetermination, refinement constraints, refinement restraints, symmetric hydrogen bonds,
- Publikační typ
- časopisecké články MeSH
The structure of the title mol-ecular salt, C10H13N4+·N3-, has been redetermined from the data published by Qian & Huang [Acta Cryst. (2010), E66, o3086; refcode WACMIY (Groom et al., 2016)]. The improvement of the present redetermination consists in a correction of the site-occupancy parameter of the bridging H atom between the pyridine rings, as well as of its position. The present study has shown that the bridging H atom (site symmetry 2) is involved in a symmetric N⋯H⋯N hydrogen bond, which is one of the longest ever observed [N⋯N = 2.678 (3) Å]. In addition, there are also present weaker Nam-H⋯Naz hydrogen bonds (am = amine and az = azide) of moderate strength and π-electron pyridine⋯π-electron inter-actions in the structure. All the azide N atoms also lie on a twofold axis.
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