Abstract:0 0 !~j u tJi .q (j iJ 0 '~ 0 • " -1-'• •• More impbrtant in a broader p~rspective is the fact that theory has now become accepted by organic, inorgi:mic~ and physical chemists as a legitimate tool fo...0 0 !~j u tJi .q (j iJ 0 '~ 0 • " -1-'• •• More impbrtant in a broader p~rspective is the fact that theory has now become accepted by organic, inorgi:mic~ and physical chemists as a legitimate tool for the study of significant chemical.problems.One of the most -2striking confirmations of this trend is the recent reorientation of a distinguished organic chemist, Professor Paul Schleyer, from a laboratory research program to one making extensive use of ab initio electronic structure theory.Although ab initio procedures are still neither as routine nor reliable as taking an NMR spectrum, that day is coming, thanks in large part to.the systematic and authoritative studies (5) of Pople and co-workers at Carnegie-Mellon.Given the vast number of papers appearing each year on electronic structure theory, it would be hopeless for me to attempt to be encyclopedic in this review.Therefore, the emphasis here will be on the most important and innovative contributions since Frank Harris's 1972 review (6).Fortunately, Richards and co-worker have compiled an excellent update (7) (for the period 1970 through 1973) of their•earlier bibliography (8) of ab initio calculations.This compendium is highly recommended and should greatly help to reduce possible duplication of scientific research.' .Read More