Salts of 2-amino-5-iodopyridinium
Reaction of 2-amino-5-iodo-pyridine (5IAP) with concentrated HBr at room temperature yielded 2-amino-5-iodo-pyridinium bromide, C<sub>5</sub>H<sub>6</sub>IN<sub>2</sub> <sup>+</sup>·Br<sup>-</sup> or (5IAPH)Br. The complex formed pale-yellow crystals, which exhibit significant hydrogen bonding between the amino and pyridinium N-H donors and bromide ion acceptors. Halogen bonding is also observed. Similarly, reaction of 5IAP with cobalt(II) chloride in mixed HCl/HBr in 1-propanol yielded 2-amino-5-iodo-pyridinium (2-amino-5-iodo-pyridine-κ<i>N</i> <sup>1</sup>)bromido/chlorido-(0.51/2.48)cobalt(II), (C<sub>5</sub>H<sub>6</sub>IN<sub>2</sub>)[CoBr<sub>0.51</sub>Cl<sub>2.48</sub>(C<sub>5</sub>H<sub>5</sub>IN<sub>2</sub>)] or (5-IAPH)[(5IAP)CoCl<sub>2.48</sub>Br<sub>0.51</sub>], as blue block-shaped crystals. Two of the three halide positions exhibit mixed occupancy [Cl/Br = 0.797 (5):0.203 (5) and 0.689 (6):0.311 (6)], while the third position is occupied solely by a chloride ion. Extensive hydrogen and halogen bonding is observed.
Authors
- Diane A. Dickie (ORCID: https://orcid.org/0000-0003-0939-3309)
- Benjamin Mukda (ORCID: https://orcid.org/0000-0002-5824-082X)
- Mark M. Turnbull (ORCID: https://orcid.org/0000-0002-0232-8224)
Institutions
- Clark University (US)
- University of Virginia (US)
Publication Details
- Journal
- Acta Crystallographica Section E Crystallographic Communications
- Published
- 2024-10-31
- DOI
- https://doi.org/10.1107/s2056989024010259
- Primary Topic
- Crystal structures of chemical compounds
- Type
- article
- Field-Weighted Citation Impact
- 0.00