Journal of the Chemical Society. Chemical communications p. 1235 - 1236 (1994)
Update date:2022-08-17
Topics:
Alder, Roger W.
Allen, Paul R.
Khosravi, Ezat
A general route to 3,3-disubstituted cyclobutenes is described and 3,3-dipropylcyclobutene is subjected to ring opening methathesis polymerisation (ROMP) using the Schrock initiator, Mo(=CHR)(=NAr)(OR')2, where R is C6H5C(Me)2-, Ar is 2,6-diisopropylphenyl and R' is (Me)3C- to give a polymer which is completely regiospecific (HT) and stereospecific (trans); the polymer is reduced to poly<(1,1-dipropyl)butane-1,4-diyl>, which shows evidence of unusual properties associated with the conformational control exerted by the quaternary centres.
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