182426-61-5

Basic information

• Product Name: C₂₁H₂₁ClN₂O₅S
• CAS NO: 182426-61-5
• Molecular Weight: 448.927
• Mol File: 182426-61-5.mol

Chemical Properties

• CAS DataBase Reference: C₂₁H₂₁ClN₂O₅S(CAS DataBase Reference)
• NIST Chemistry Reference: C₂₁H₂₁ClN₂O₅S(182426-61-5)
• EPA Substance Registry System: C₂₁H₂₁ClN₂O₅S(182426-61-5)

Safety Data

• Hazardous Substances Data: 182426-61-5(Hazardous Substances Data)

Upstream product

• 108-24-7 acetic anhydride 
• 178935-04-1 C₁₉H₁₉ClN₂O₄S 
• 182426-59-1 C₁₂H₁₄ClNO₄S 
• 19219-99-9 2-methyl-5-chlorobenzoxazole 

Relevant articles and documents

Structure of rhodanine cyanine dyes, spectroscopy and performance in photographic emulsions

The synthesis is reported of eight pyridine-, benzothiazole- and benzimidazole-rhodanine zeromethine merocyanines as bluesensitising dyes (1-8), and of three benzoxazole-rhodanine dimethine merocyanines as green-sensitising dyes (9-11). The compounds were characterised from UV-VIS, mass spectroscopic and NMR data, and the purity of the products was analysed using HPLC. Oxidation potentials were measured using cyclic voltammetry. Ionisation potentials and electron affinities were obtained by semi-empirical MOPAC calculations. The charge-density distributions of the pyridine and benzothiazole rhodanine dyes are in agreement with assignments in NMR spectroscopy. A linear dependence is found between the oxidation potential and ionisation potential, as well as between the reduction potential and electron affinity. Reflection spectra of 6 and 7 coated on photographic emulsions showed J-aggregate absorption at λ= 450 and 465 nm, respectively. The sensitising properties of the merocyanine dyes were evaluated in actual photographic T-grain emulsions.