References and Notes (1)(a) Acknowledgment is made to the donors of the Petroleum Research Fund, adminlstered by the American Chemical Society, for support in part of this research;(b) on sabbatical leave from Ripon College, 1975-1976;(c) Fellow of the Schweizerischen Stiftung fur Stipendien auf dem Gebiete der Chemie, 1974-1975.