Haque, Inamul published the artcileInfrared spectra of pyridine-halogen complexes, Synthetic Route of 6443-90-9, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (1967), 23(1), 959-67, database is CAplus.
The IR spectra of the complexes C5H5N.I2, C5H5N.IBr, C5H5N.ICl, and C5H5N.ICN have been examined, in a range of environments. In polar solvents the ionization 2C5H5N.IX ⇌ (C5H5N)2.I+ + IX2- takes place. The vibrations of the complexes are assigned and discussed on the basis of a M.O. treatment.
Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about 6443-90-9. 6443-90-9 belongs to iodides-buliding-blocks, auxiliary class Pyridines, name is Pyridine Iodochloride complex, and the molecular formula is C5H5ClIN, Synthetic Route of 6443-90-9.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com