Separation of stereoisomers by column fractional precipitation was written by Schulz, Wolfgang W.;Purdy, William C.. And the article was included in Anal. Chem. in 1963.SDS of cas: 96761-85-2 This article mentions the following:
Column fractional precipitation is extended to the separation of 1,3,5-tris(3-bromophenyl)benzene from 1,3,5-tris(4-bromophenyl)benzene, with p-dioxane-water. The 3 fractions of greatest overlap were analyzed from the absorbances at 260.2 and 253.0 mμ by using simultaneous equations. o,p-Quaterphenyl was separated from m,p-quaterphenyl and the overlapping fractions were analyzed by the absorbance ratios at 265 and 248 mμ. In the experiment, the researchers used many compounds, for example, 3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl (cas: 96761-85-2SDS of cas: 96761-85-2).
3,3”-Dibromo-5′-(3-bromophenyl)-1,1′:3′,1”-terphenyl (cas: 96761-85-2) 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. 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.SDS of cas: 96761-85-2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary