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Condensation Reactions of 1,3-Dimethyl-6H-cyclohepta[c] thiophen-6-one

✍ Scribed by Priv.-Doz. Dr. Gunther Seitz; Heinrich Mönnighoff

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
236 KB
Volume
9
Category
Article
ISSN
0044-8249

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✦ Synopsis

ation of ( / ) is slow and does not interfere with the electrode reaction. Logarithmic analysis of the broad reduction wave, by computer demonstrated two one-electron transitions with similar half-wave potentials a n d equal limiting currents. The difference between the half-wave potentials and EFi2 is 70 mV; this is a measure of the electrostatic repulsion energy of the two electrons in the highestoccupied M O of ( l ) [ l O l . For the hydrocarbon (41, the potential diKerence is 200 mV [81. It becomes intelligible why these potential differences should not be identical if one assumes that ( I ) has a triplet ground state; i.e., the electron correlation for the triplet state leads t o a repulsion energy that is lower than that for the singlet.

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