Matsuura, Tohru et al. published their research in Macromolecules in 1992 | CAS: 3268-21-1

1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1) belongs to iodide derivatives. Typical reactions of alkyl iodides include nucleophilic substitution, elimination, reduction, and the formation of organometallics. Iodo alkanes participate in a variety of organic synthesis reactions, which include the Simmons–Smith reaction (cyclopropanation using iodomethane), Williamson ether synthesis, Wittig reaction, Grignard reaction, alkyl coupling reactions, and Wurtz reaction.Product Details of 3268-21-1

Polyimides derived from 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl. 2. Synthesis and characterization of polyimides prepared from fluorinated benzenetetracarboxylic dianhydrides was written by Matsuura, Tohru;Ishizawa, Maki;Hasuda, Yoshinori;Nishi, Shiro. And the article was included in Macromolecules in 1992.Product Details of 3268-21-1 This article mentions the following:

Fluorinated rigid-rod polyimides are prepared by the polymerization of 2,2′-bis(trifluoromethyl)-4,4′-diaminobiphenyl (I) with 1,4-bis(trifluoromethyl)-2,3,5,6-benzenetetracarboxylic dianhydride (II), 1-(trifluoromethyl)-2,3,5,6-benzenetetracarboxylic dianhydride, or pyromellitic dianhydride (III). The dielec. constant, refractive index, and water absorption of the copolymers decrease with an increasing number of CF3 side chains. The I–II polyimide, which has the highest F content, has the lowest dielec. constant of 2.6 at 1 MHz, the lowest refractive index of 1.490 at 589.3 nm, and the lowest water absorption of 0.38%. The coefficient of thermal expansion (CTE) of the copolymers increases with an increasing number of CF3 side chains. I–III polyimide has a neg. CTE of -5 × 10-6 °C-1 by thermomech. anal. and a high polymer decomposition temperature of 613° measured for a 10% weight loss in a N atm. by TG. In the experiment, the researchers used many compounds, for example, 1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1Product Details of 3268-21-1).

1,4-Diiodo-2,3,5,6-tetramethylbenzene (cas: 3268-21-1) belongs to iodide derivatives. Typical reactions of alkyl iodides include nucleophilic substitution, elimination, reduction, and the formation of organometallics. Iodo alkanes participate in a variety of organic synthesis reactions, which include the Simmons–Smith reaction (cyclopropanation using iodomethane), Williamson ether synthesis, Wittig reaction, Grignard reaction, alkyl coupling reactions, and Wurtz reaction.Product Details of 3268-21-1

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com