Generation and nuclear magnetic resonance studies of 9-heteroanthracenide anions: 9-selena-, 9-phospha-and 9-arsaanthracenides

…, LL Healy, MR Lauria, ME Lansdown

Index: Kasmai, Hamid S.; Femia, Joseph F.; Healy, Laura L.; Lauria, Michele R.; Lansdown, Mary E. Journal of Organic Chemistry, 1987 , vol. 52, # 24 p. 5461 - 5466

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Citation Number: 3

Abstract

The thermally stable heteroanthracenide ions 9d-g were generated upon exposure of the respective conjugate acids 8d-g to KNHz in liquid NH3 and were studied by 'H, 13C, and 31P NMR. It is shown that 9d possesses a paratropic molecular frame, while 9e and 9f exhibit no detectable paramagnetic ring current effect. Possible electronic and steric interactions that may give rise to the observed NMR characteristics of 9e-g are discussed, ...