Catenation of 1,3‐Diphosphacyclobutane‐2,4‐diyl Units Having 2,4,6‐Tri‐tert‐butylphenyl Protecting Groups and a P‐sec‐Butyl Group in the Ring |
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| Authors: | Shigekazu Ito Dr. Joji Miura Noboru Morita Masaaki Yoshifuji Anthony J. Arduengo III |
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| Affiliation: | 1. Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980–8578, Japan, Fax: +81‐3‐5734‐2776;2. Present address: Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro, Tokyo 152–8552, Japan;3. Department of Chemistry, The University of Alabama, Tuscaloosa, U.S.A. |
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| Abstract: | Two and three stable 1‐sec‐butyl‐2,4‐bis(2,4,6‐tri‐tert‐butylphenyl)‐1,3‐diphosphacyclobutane‐2,4‐diyl units were catenated to construct multi‐biradical derivatives by utilizing 1,3‐di‐, 1,4‐di‐, and 1,3,5‐trimethylenebenzenes as bridging groups, respectively. UV/Vis spectroscopic and cyclovoltammetric (CV) properties of the multi‐biradicals indicate a non‐conjugative interaction between the concatenated biradical units. |
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| Keywords: | Phosphorus heterocycles Polyradicals Electrochemistry Density functional calculations Steric hindrance |
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