1,1-Diphenylethylene Explained

1,1-Diphenylethylene is an aromatic hydrocarbon with chemical formula CH.

Properties

1,1-Diphenylethylene mediates the radical polymerization of methyl acrylate or styrene. Meditation by 1,1-Diphenylethylene generates low molecular weight polymer by a termination reaction.^[1] Dibenzofulvene is an analogue of a 1,1-Diphenylethylene.^[2]

Synthesis

1,1-Diphenylethylene is technical prepared by alkylating benzene by styrene in presence of a zeolite beta and subsequent dehydrogenation.^[3]

styrene + benzene → 1,1-diphenylethane → 1,1-diphenylethylene + H

See also

• Dibenzofulvene
• Stilbene

Notes and References

1. Minjian Zhao . Zhifeng Fu . Yan Shi . Wantai Yang . Polymerization Mechanism in the Presence of 1,1-Diphenylethylene Part 2: Synthesis and Characterization of PMA and PSt . Macromolecular Chemistry and Physics . 2015 . 216 . 22 . 2202–2210 . 10.1002/macp.201500249 .
2. Tamaki Nakano . Kazuyuki Takewaki . Tohru Yade . Yoshio Okamoto . Dibenzofulvene, a 1,1-Diphenylethylene Analogue, Gives a π-Stacked Polymer by Anionic, Free-Radical, and Cationic Catalysts . J. Am. Chem. Soc. . 2001 . 123 . 37 . 9182–9183. 10.1021/ja0111131 . 11552835 .
3. EP0742190 A1, BASF, 13 Nov 1996, Process for the Preparation of Diarylethanes