Rubenacker, Gerald V. published the artcileNitrogen-14 nuclear quadrupole resonance spectra of pyridine-halogen complexes, Recommanded Product: Pyridine Iodochloride complex, the publication is Inorganic Chemistry (1980), 19(2), 398-401, database is CAplus.
The 14N NQR spectra at 77 K are reported for adducts of pyridine with Cl2, Br2, I2, ICN, ICl, IBr, BrCl, Br+, and I+. The data are interpreted in terms of a model for coordinated N based on the Townes-Dailey approximations The model yields estimates of the donor orbital occupancy, σ, for the N orbital directed toward the Lewis acid. The order of Lewis acid strengths based on relative σ values is ICN < I2 < IBr < ICl < BrCl. The pyridine-Cl2 complex appears to be ionic. The most reasonable formulation is [(py)Cl]Cl. Among the halogen cations the order of Lewis acidities is as expected: I+ < Br+ < Cl+.
Inorganic Chemistry 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, Recommanded Product: Pyridine Iodochloride complex.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com