Watari, Fumio published the artcileFar infrared spectra of pyridine-iodine monochloride and pyridine-iodine monobromide complexes, Application of Pyridine Iodochloride complex, the publication is Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (1967), 23(6), 1917-21, database is CAplus.
The far ir spectra of pyridine-iodine monochloride (I) and pyridine-iodine monobromide (II) complexes have been measured in the region from 500 to 80 cm.-1 in paraffin mulls. Three absorption bands were observed and assigned as I: ν16b (pyridine) = 425, νICl = 265, νNI = 170 cm.-1; II, ν16b(pyridine) = 421, νIBr = 200, and νNI = 160 cm.-1 Under assumptions of a linear triat. model and fNI,ICl = fNI,IBr, the force constants were calculated: fICl = 1.18 (estimated by the Badger rule), fIBr = 1.05, fNI(Cl) = 0.91, fNI(Br) = 0.85, and fNI,ICl = fNI,IBr = 0.22 (millidyne)/A.). The force constant of the interhalogen vibration, fIX, is one half of that of the free mol. The interaction constant is larger than that of a usual mol., which will be characteristic of the mol. complex. 16 references.
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 C8H14O4, Application of Pyridine Iodochloride complex.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com