Abed El-Aal, R. M. published the artcileSynthesis and photophysics in organic solvents of mesosubstituted pentamethine and related metal complexes cyanine dyes, Computed Properties of 606-55-3, the publication is Dyes and Pigments (2002), 54(2), 121-129, database is CAplus.
The reaction in a ratio of 1 mol of diacetylchloromethane with 1 mol of heterocyclic nitrogen bases afforded N-substituted heterocyclidinium ylide halides. Reaction at a ratio of 1 mol of ylides with 2 and 3 mol of 2(4)-methylheterocyclic quaternary salts in basic catalyst afforded meso-substituted pentamethine and monomethine meso-substituted pentamethine cyanine dyes, resp. Reaction of equimolar ratios of metal chloride adducts of the ylides with equi- (bi)molar ratios of 2(4)-methylheterocyclic quaternary salts in basic medium afforded asym. (sym.) meso-substituted mono- (bis)monomethine metal complex cyanine dyes. Elemental analyses and IR and 1H NMR spectral data confirmed the structures of the newly synthesized compounds The electronic absorption spectra of these dyes in ethanol and their photophysics in different solvents are discussed.
Dyes and Pigments published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C12H14IN, Computed Properties of 606-55-3.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com