Ai>,b cm-1 pK(i)« pK(2)" tao3 (25°), sec-1 fc.*'( 25°), M-1 sec-1 k0H/ (25°), M~l sec-1 nh3 8500 5.79» 1.8 X '2 1.6 X 10s 1.8 X 103Vs(m-bn)4.2 X 10-= 9.8 X 103Wlbn)1.5 X 10-4 5.0 X 10= 2.1 X 103 'Mpn) 8200 6.2 X 10-® 4.5 X 10s 2.3 X 103 'Men) 8100 4.45* 7.94'* 3.2 X 10-5 2.5 X 106 3.0 X 103 y2(N-me • en)
Die Reaktion des Tetraketons (I) mit Hydrazin in Gegenwart von Sauerstoff führt zu dem Tetracyclus (II), der mit Pd‐Kohle in Triäthylenglykol zu dem Cyclopentacenaphthylen (III) (15% Ausbeute) dehydriert wird.
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