1. For recent reviews, see (a) Prog. Nucl. Magn. Reson. Spectrosc., edited by and Pergamon Press, Oxford, in Press;
2. (b) Annu. Rep. NMR Spectrosc., edited by Academic Press, New York, 15, 106 (1983);
3. (c) In Isotopes in Organic Chemistry, edited by and Vol. 6. p. 1 Elsevier, Amsterdam (1984).
4. (a) and Tetrahedron Lett. 2845 (1982);
5. Deuterium isotope effects on carbon-13 chemical shifts in cyclophanes. Deshielding intrinsic through-space and through-bond effects