113830-50-5

Basic information

• Product Name: methyl (1R,3R)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate
• Synonyms: cis-Decamethrinic acid methyl ester
• CAS NO: 113830-50-5
• Molecular Formula: C₉H₁₂Br₂O₂
• Molecular Weight: 311.9984
• Mol File: 113830-50-5.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 272.9°C at 760 mmHg
• Flash Point: 118.9°C
• Density: 1.784g/cm³
• Vapor Pressure: 0.00591mmHg at 25°C
• Refractive Index: 1.608
• CAS DataBase Reference: methyl (1R,3R)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate(CAS DataBase Reference)
• NIST Chemistry Reference: methyl (1R,3R)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate(113830-50-5)
• EPA Substance Registry System: methyl (1R,3R)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate(113830-50-5)

Safety Data

• Hazardous Substances Data: 113830-50-5(Hazardous Substances Data)

Upstream product

• 61775-87-9 methyl <1R,cis>-2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropanecarboxylate 

Downstream Products

• 133472-25-0 methyl cis-3-<(E)-2-(4-fluorophenyl)-2-(1-hexynyl)ethenyl>-2,2-dimethylcyclopropanecarboxylate 
• 133472-23-8 methyl cis-3-<(Z)-2-bromo-2-(4-fluorophenyl)ethenyl>-2,2-dimethylcyclopropanecarboxylate 
• 133472-24-9 methyl cis-3-<2,2-di(2-thienyl)ethenyl>-2,2-dimethylcyclopropanecarboxylate 

Relevant articles and documents

Pyrethroid Photochemistry: Mechanistic Aspects in Reactions of the (Dihalogenovinyl)cyclopropanecarboxylate Substituent

The reaction quantum yields of six pyrethroid insecticides in methanol at 300 nm vary 3-10-fold between compounds with a cyclopentanone chromophore (allethrin) as compared with the phenoxybenzyl group (e.g., permethrin, decamethrin)in the alcohol moiety.Chlorine confers greater photostability than bromine in pyrethroids with dihalogenovinyl substituents in the acid moiety.Pathways for photodecomposition of methyl -2,2-dimethyl-3-(2,2-dibromovinyl)cyclopropanecarboxylate in methanol at 250 or 300 nm involve cis-trans isomerization, reductive debromination, and conversion of the dibromovinyl group into a bromomethoxy-epoxide derivative.Isomerization, but not debromination, involves a triplet excited state.