Straccia C., Vianni G.; Lugo, Pedro L.; Rivela, Cynthia B.; Blanco, Maria B.; Wiesen, Peter; Teruel, Mariano A. published an article in 2021. The article was titled 《OH-initiated degradation of methyl 2-chloroacetoacetate and ethyl 2-chloroacetoacetate: Kinetics, products and mechanisms at 298 K and atmospheric pressure》, and you may find the article in Chemosphere.Application of 5781-53-3 The information in the text is summarized as follows:
Rate coefficients for the gas-phase reactions of OH radicals with CH3C(O)CHClC(O)OCH3 (k1) and CH3C(O)CHClC(O)OCH2CH3 (k2) were measured using the relative technique with different reference compounds The experiments were performed at (298 ± 2) K and 750 Torr of nitrogen or synthetic air by in situ FTIR spectroscopy and GC-FID chromatog. The following rate coefficients (in units of cm3mol.-1 s-1) were obtained: k1FTIR= (2.70 ± 0.51) x 10-11; k1GC-FID= (2.30 ± 0.71) x 10-11 and k2FTIR= (3.37 ± 0.62) x 10-11; k2GC-FID= (3.26 ± 0.85) x 10-11. This work reports the first kinetic study for the reactions of OH radicals with the mentioned chloroacetoacetates. Addnl., product studies are reported in similar conditions of the kinetic experiments Acetic acid, acetaldehyde, formyl chloride, and Me 2-chloro-2-oxoacetate were pos. identified and quantified as degradation products. According to the identified products, atm. chem. mechanisms were proposed. The environmental implications of these reactions were assessed by the tropospheric lifetimes calculations of the title chloroesters. Significant average ozone production of 4.16 ppm for CH3C(O)CHClC(O)OCH3 and 5.98 ppm for CH3C(O)CHClC(O)OCH2CH3, resp. were calculated In the experimental materials used by the author, we found Methyl 2-chloro-2-oxoacetate(cas: 5781-53-3Application of 5781-53-3)
Methyl 2-chloro-2-oxoacetate(cas: 5781-53-3) belongs to acyl chlorides. Lacking the ability to form hydrogen bonds, acyl chlorides have lower boiling and melting points than similar carboxylic acids. For example, acetic acid boils at 118 °C, whereas acetyl chloride boils at 51 °C. Like most carbonyl compounds, infrared spectroscopy reveals a band near 1750 cm−1.Application of 5781-53-3
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics