Organoelement Compounds
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ChemInform Abstract: The Rate of Ring Closure of 1,1-Dimethyl-2-phenyl-1-silabuta-1,3-diene to 1,1-Dimethyl-2-phenyl-1-silacyclobutene.
First published: May 30, 1989
Abstract
Irradiation of (II) in a 3-methylpentane glass at 77 K yields the siladiene (I) whose UV spectrum displays a maximum wavelength at 338 nm.
ChemInform Abstract
Irradiation of (II) in a 3-methylpentane glass at 77 K yields the siladiene (I) whose UV spectrum displays a maximum wavelength at 338 nm. Flash photolysis of (II) produces the same reactive siladiene (I), which cyclizes to the starting ring structure. The barrier for the activation energy which is necessary for the ring closure reaction is given. The rate constant for this reaction is compared to that of polymerization. Trapping studies with Me3Si-O-Me support both the kinetic and spectral assignments.
