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Proceedings Paper

Improved process for the synthesis of [2,2]-paracyclophane
Author(s): Long Zhang; Juan Wang; Leng Gao; Yulun Xu; Weimin Gao
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Paper Abstract

An improved method for the preparation of [2,2]-paracyclophane, which is the monomer of poly-p-xylene widely used as high quality electrical coating material, by Hoffmann elimination employing p-methyl-benzyl chloride and trimethyl amine as main raw materials was developed. Influence of solvent, reaction time, reaction temperature etal on the yield of paracyclophane was investigated experimentally. Suitable reaction parameters were obtained as follows: n(Alkali) : n(Quaternary ammonium) is 5:1; catalyst: 0.2% cupric salt; with 1,4-dioxane as solvent and 0.2% sodium borohydride as reducer, and N2 as protection gas; reaction temperature 110°C, reaction time is 30 hr, at the condition, the yield of [2,2]-paracyclophane is 78.6%, its purity is over 99.5%, with melting point 284-285°C. Analysis results by IR and melting temperature measurement etal identify the substance synthesized is [2,2]-paracyclophane. And the materials used is industrially available and better yield was obtained comparing with the values present in the patent literatures.

Paper Details

Date Published: 23 January 2006
PDF: 6 pages
Proc. SPIE 6029, ICO20: Materials and Nanostructures, 60291G (23 January 2006); doi: 10.1117/12.667759
Show Author Affiliations
Long Zhang, Changchun Univ. of Technology (China)
Juan Wang, Changchun Univ. of Technology (China)
Leng Gao, Changchun Univ. of Technology (China)
Yulun Xu, Changchun Univ. of Technology (China)
Weimin Gao, Changchun Univ. of Technology (China)

Published in SPIE Proceedings Vol. 6029:
ICO20: Materials and Nanostructures
Wei Lu; Jeff Young, Editor(s)

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