Polymerization of n-butyl acrylate photoinitiated by 1-(bromoacetyl)pyrene and its arsonium salt was written by Mishra, Anuradha;Daswal, Swati. And the article was included in Journal of Macromolecular Science in 2006.Computed Properties of C18H11BrO The following contents are mentioned in the article:
A comparative study on the photoinitiating efficiency of pyrene (Py), 1-acetylpyrene (AP), 1-(bromoacetyl)pyrene (BP), and 1-acetylpyrene triphenylarsonium bromide (APAS) for polymerization of Bu acrylate (BA) was done. Exptl. investigation of the kinetics of free radical solution polymerization at 25±0.2°C using all four photoinitiators showed that pyrene was completely ineffective in initiating the polymerization under all conditions employed, whereas AP was able to initiate polymerization Incorporation of a bromo group into AP markedly accelerated the rate of UV-induced polymerization Further modification of the bromo derivative (BP) to its arsonium salt (APAS) produced a less effective initiator. The kinetics and mechanism of polymerization using BP and APAS as initiators have been investigated in detail. The polymerization with BP followed non-ideal kinetics (Rp∝[BP]0.8 [BA]0.98) with respect to initiator concentration, whereas ideal kinetics (Rp∝[APAS]0.49 [BA]1.07) was observed when APAS was used as an initiator. This unusual kinetic behavior for the BP-BA system can be interpreted in light of degradative transfer and the emergence of occlusion. The kinetic data proved that BP was a more effective and faster initiator than APAS. This study involved multiple reactions and reactants, such as 2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5Computed Properties of C18H11BrO).
2-Bromo-1-(pyren-1-yl)ethanone (cas: 80480-15-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbonbromine bond is electrophilic in nature. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Computed Properties of C18H11BrO
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary