Synthesis and Characterization of Molecules and π-Conjugated Materials Containing Low-Coordinate Phosphorus

Title:	Synthesis and Characterization of Molecules and π-Conjugated Materials Containing Low-Coordinate Phosphorus
Author:	Chen, Xufang
Description:	There are many similarities between phosphaalkenes and phosphaalkynes, low-coordinate phosphorus compounds containing RP=CR2 and RC≡P functional groups, and olefins (R2C=CR2), their unsaturated carbon analogues. Phosphanylidene-σ^4-phosphoranes have proven to be phospha-Wittig reagents that react with aldehydes to generate phosphaalkenes. Using the phospha-Wittig reaction, phosphaalkene oligomers and polymers were synthesized and characterized and shown to exhibit bathochromic shifts in comparison with related olefins. meta-Terphenyl phosphaalkynes have also been prepared. These materials were prepared for possible synthesis of transition metal complexes of phosphaalkynes. In addition, phosphanylidene-σ^4-phosphoranes react with ortho-quinones to form 1,3,2-dioxaphospholanes or β-phosphaenones depending on the nature of the quinone. Furthermore, meta-terphenyls containing methoxy groups were investigated which have different properties from those having alkyl substitutents. 2,6-Dimesitylphenyl difluorophosphine was synthesized and characterized and found to be relatively inert to reduction by active magnesium.
Permanent Link:	http://rave.ohiolink.edu/etdc/view?acc_num=case1102137178 http://hdl.handle.net/2374.OX/16438
Date:	2005

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