Bahr, G. published the artcileHeavy metal complexes of Schiff bases. IV. Heavy metal complexes with pyridine-2-aldehyde alkylimines, Related Products of iodides-buliding-blocks, the publication is Zeitschrift fuer Anorganische und Allgemeine Chemie (1957), 119-38, database is CAplus.
cf. C.A. 50, 6996c. The Schiff bases C5H4NCH:NR (R = CH3 to C7H15) (I) are prepared in 90% yield by reaction of 2-C5H4NCHO with the appropriate amine. The Me compound is crystalline, but the rest are colorless oils, more stable to hydrolysis than the analogous arylimines. I with Fe(ClO4)2 in MeOH gives dark violet Fe(I)3(ClO4)2, decompose 233-4°, 235-6°, and 234-5° for the Me, Et, and Pr compounds, resp. In Me2CO or MeOH these form MnO4–-colored solutions which in 10-3 to 10-4M solution obey the Beer-Lambert Law. Absorption spectra (4280-7290 A.) of the Fe complexes in MeOH show that the Me compound, whose sensitivity in neutral aqueous solution is 1:2 × 107, has a maximum at 5510 A. In acid solution the color develops slowly but is stable. In alk. solution the color develops at once, but Fe2O3.xH2O precipitates in a few hrs. from solutions 1N in NaOH. Photometric data show that I (R = Et) displaces 2,2′-bipyridine from Fe(II) complexes of the latter; the reaction is reversible. Fe(I)3++ (R = Et) is reversibly oxidized to Fe(I)3+++ (blue) by Ce(IV). I with CuCl2.2H2O in Me2CO gives green CuCl2.I, decomposing 242-3° and 227-8° (R = Me and Et, resp.), or m. 196°, 208-9°, 205-6°, 206-7°, and 207-8° for the C3H7 to C7H15 compounds, resp. With NaOH the Cu complexes give blue precipitates, soluble in excess NaOH to form blue-violet solutions which soon become brown and turbid from Cu2O precipitation The blue-violet solutions are restored by shaking the mixture in air. I with HgCl2 in Me2CO gives colorless HgCl2.I, insoluble in H2O, decomposing 125° (Me, Et, or Pr compounds) or m. 121-2°, 124°, 138°, and 136-7° for C4H9 to C7H15 compounds, resp. I with HgBr2 in Et2O gives colorless HgBr2.I, insoluble in H2O, decomposing 130° (Me, Et, or Pr compounds) or m. 123°, 95°, 94°, and 92° for the C4H9 to C7H15 compounds, resp. I with Hg(ClO4)2 in MeOH gives colorless, H2O-soluble Hg(I)2(ClO4)2, m, 239-40°, 226-7°, and 136° for the Me, Et, and Pr complexes. With I– the ClO4– compounds give Hg(I)2I2, also obtained by adding HgI2 to the liquid Schiff bases and diluting with H2O. The Hg complexes are destroyed by H2S, SnCl2, dilute acid, NH3, or alk. solution I with anhydrous ZnCl2 in Et2O gives colorless ZnCl2.I, m. 189°, 184°, 208°, 131°, 113°, 100°, and 112° for the CH3 to C7H15 compounds, resp. NH3 or AgNO3, but not K4Fe(CN)6, decompose the Zn complexes.
Zeitschrift fuer Anorganische und Allgemeine Chemie 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, Related Products of iodides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com