2nd Order JT References

[slee ^at^ ccl.net (Thomas Slee)]

 Dear CCL folks,
 Looking through the recent discussion of the origin of the pseudo, or
 2nd order, Jahn Teller effect, I did not see any mention of what I
 understand to be the original derivation of this effect (though close in
 time to Dr. Hobey's reference, so maybe there is more than one
 "original"
 reference, as not infrequently happens).
 Richard Bader derived the 2nd order effect, and applied
 it to the symmetries of equilibrium geometries as well as to
 dissociative pathways for unimolecular reactions, in two papers:
 R. F. W. Bader, Mol. Phys., 1960, 3, 137
 R. F. W. Bader, Can. J. Chem., 1962, 40, 1164.
 This work is discussed along with others in a fairly chronologically
 oriented account by R. G. Pearson in his book "Symmetry Rules for
 Chemical Reactions", Wiley, 1976.
 			Tom Slee