1. T. H. Lowry and K. S. Richardson, Mechanism and Theory in Organic Chemistry (Harper & Row, New York, 1976), pp. 405–416.
2. I. Olovsson and P.‐G. Jönsson, The Hydrogen Bond—Recent Developments in Theory and Experiments, edited by P. Schuster, G. Zundel, and C. Sandorfy (North‐Holland, Amsterdam, 1976).
3. (a) The Hydrogen Bond—Recent Developments in Theory and Experiments, edited by P. Schuster, G. Zundel, and C. Sandorfy (North‐Holland, Amsterdam, 1976), Chaps. 12 and 16.
4. (b) G. C. Pimentel and A. L. McClellan, The Hydrogen Bond (Freeman, San Francisco, 1960), Chap. 3.
5. (a) B. Nelander, J. Mol. Struct. 69, 59 (1980); JMOSB40022-2860