Improved preparative method for 1,2-diaryl-3,4-diphosphinidenecyclobutenes and its application to the studies of l,2-bis(arylthienyl)-3,4- diphosphinidenecyclobutenes

Bulletin of the Chemical Society of Japan

Volumn 80, Issue 8, 2007, Pages 1580-1586

  Toyota, Kozo ^a   Horikawa, Keiko ^a   Jensen, Rader S ^a   Omori, Kouhei ^a   Kawasaki, Subaru ^a   Ito, Shigekazu ^a   Yoshifuji, Masaaki ^b   Morita, Noboru ^a  

^a TOHOKU UNIVERSITY   (Japan)

^b UNIVERSITY OF ALABAMA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 34548302875     PISSN: 00092673     EISSN: 13480634     Source Type: Journal    
DOI: 10.1246/bcsj.80.1580     Document Type: Article

References (38)

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37. Although the concentration in this experiment is relatively low, this is not crucial: higher or lower concentration may give similar results.
38. This fact may indicate that steric hindrance between the Mes* groups and the substituents at the 1,2-positions (of the cyclobutene ring) is larger in (E,E)-1TP than in (E,E)-1TT. causing facile isomerization of (E,E)-1TP, in order to release the congestion. In the case of (E,E)-1PP. the UV-visible absorption spectrum was blue-shifted compared to those of (E,E)-1TP and (E,E)-1TT. Consequently, isomerization of ((E,E))-1PP is not as easy as that of (E,E)-1TP.