MP2 and DFT Calculations on Circulenes and an Attempt to Prepare the Second Lowest Benzolog, [4]Circulene
作者:Hilmar Christoph、Jörg Grunenberg、Henning Hopf、Ina Dix、Peter G. Jones、Martin Scholtissek、Günther Maier
DOI:10.1002/chem.200701837
日期:2008.6.20
from the corresponding tetramethyl derivative (8) and subjected to various dehalogenation reactions; all attempts to obtain [2.2]biphenylenophane (7) as a precursor for 2 by this route failed. Treatment of 14 with sodium sulfide furnished the thiaphanes 16 and 17, thermal and photochemical desulfurization of which also failed to provide 7. In a second approach [2.2]paracyclophane was converted to the