Salts of 2-amino-5-iodo­pyridinium

Authors

Benjamin A. Mukda, Clark University
Diane A. Dickie, Clark University
Mark M. Turnbull, Clark UniversityFollow

Document Type

Article

Abstract

Reaction of 2-amino-5-iodopyridine (5IAP) with concentrated HBr at room temperature yielded 2-amino-5-iodopyridinium bromide, C₅H₆IN₂⁺·Br^- 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-iodopyridinium (2-amino-5-iodopyridine-κN¹)bromido/chlorido(0.51/2.48)cobalt(II), (C₅H₆IN₂)[CoBr_0.51Cl_2.48(C₅H₅IN₂)] or (5-IAPH)[(5IAP)CoCl_2.48Br_0.51], 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.

Publication Title

Acta Crystallographica Section E: Crystallographic Communications

Publication Date

10-2024

Volume

80

First Page

1230

Last Page

1234

ISSN

2056-9890

DOI

10.1107/S2056989024010259

Keywords

2-amino-5-iodopyridine, Co(II), crystal structure

Repository Citation

Mukda, Benjamin A.; Dickie, Diane A.; and Turnbull, Mark M., "Salts of 2-amino-5-iodo­pyridinium" (2024). Chemistry. 47.
https://commons.clarku.edu/chemistry/47

Cross Post Location

Student Publications

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright Conditions

Mukda, B. A., Dickie, D. A., & Turnbull, M. M. (2024). Salts of 2-amino-5-iodopyridinium. Structure Reports, 80(11), 1230-1234. https://doi.org/10.1107/S2056989024010259