Hu, Yanming et al. published their research in Journal of Polymer Science, Part A: Polymer Chemistry in 2010 | CAS: 162258-89-1

4-Bromo-4′-tert-butylbiphenyl (cas: 162258-89-1) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Computed Properties of C16H17Br

Synthesis and gas permeation properties of poly(diarylacetylene)s having substituted and twisted biphenyl moieties was written by Hu, Yanming;Shimizu, Toshiyuki;Hattori, Kyohei;Shiotsuki, Masashi;Sanda, Fumio;Masuda, Toshio. And the article was included in Journal of Polymer Science, Part A: Polymer Chemistry in 2010.Computed Properties of C16H17Br This article mentions the following:

Diarylacetylene monomers containing substituted biphenyl (1a-f) and anthryl (1g) groups were synthesized and then polymerized with TaCl5-n-Bu4Sn catalyst to produce the corresponding poly(diarylacetylene)s (2a-g). Polymers 2a-f were soluble in common organic solvents such as cyclohexane, toluene, and chloroform. According to thermogravimetric anal., the onset temperatures of weight loss of the polymers were over 400° in air, indicating considerably high thermal stability. Free-standing membranes 2a and 2c-e were prepared by the solution casting method. Desilylation of Si-containing membrane 2c was carried out with trifluoroacetic acid to afford 3c. All the polymer membranes, especially those having twisted biphenyl groups, exhibited high gas permeability; for example, their oxygen permeability (PO2) values ranged from 130 to 1400 barriers. Membrane 2d having two chlorine atoms in the biphenyl group showed the highest gas permeability (PO2 = 1400 barriers) among the present polymers. In the experiment, the researchers used many compounds, for example, 4-Bromo-4′-tert-butylbiphenyl (cas: 162258-89-1Computed Properties of C16H17Br).

4-Bromo-4′-tert-butylbiphenyl (cas: 162258-89-1) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Computed Properties of C16H17Br

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary