Cyclopropane Ring Opening by Photolytically Generated Bromine Atoms
Hoffmann, John M.
Graham, Kenneth J.
Rowell, Charles F.
MetadataShow full item record
Bromine atoms, generated by irradiation by a mercury lamp bearing a filter to assure that only wavelengths >310 nm passed, were permitted to react with a series of 1,2-diarylcyclopropanes in carbon tetrachloride solution. The major product in all cases (>80%) was the 1,3-dibromo-1,3-diarylpropane. Kinetic data at approximately 10ˉ³M gave a rate expression dBr₂/dt = -k(cyclopropane)(bromine)¹′². A Hammett treatment of the data gave p = -0.5 for both the cis series and the trans series. Synthesis of several possible minor products and their comparison with the reaction mixture by TLC is reported. Possible reactions such as induced isomerization are thus eliminated from consideration.
The article of record as published may be found at http://dx.doi.org/10.1021/jo00909a001
Showing items related by title, author, creator and subject.
Sovereign, Michael G.; Stewart, Joseph S., II (Monterey, California. Naval Postgraduate School, 1986-06); LIDS-R-1624A series of annual experiments in Command, Control and Communications have been held at NPS over the last three years. These experiments have been sponsored by the Defense Communications Agency under the auspices of the ...
Johnson, Brian E (Monterey, California. Naval Postgraduate School, 1997-12);In this thesis we present an algorithm for the precise determination of the Mie extinction efficiency parameter. The mathematical representation of the Mie parameters is in the form of an infinite series, and any technique ...
Lewis, Peter A. W. (Monterey, California. Naval Postgraduate School, 1976-09); NFS 55Lw76091We describe recent results in the development of methodology of the statistical analysis of univariate series of events (point processes) and give some references to applications in the analysis and evaluation of computer ...