By R. McWeeny (auth.), Jean Maruani (eds.)
`The publication benefits a spot in any technological know-how Library and that i suggest it to someone who stocks the most obvious fascination of the writers with molecules and accepts that molecular homes are usually most sensible defined by way of mathematical expressions.'
M. Godfrey, magazine of Electroanalytical Chemistry, 269 (1989)
`... offer a breathtaking view of the prestige and strength of molecular sciences on the finish of the 19 eighties. This four-volume set ... represents an exceptional worth for any medical library or inner most collections. making a broad-based and wealthy mini-series on molecular sciences.'
Structural Chemistry, 1:5
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Additional info for Molecules in Physics, Chemistry, and Biology: Electronic Structure and Chemical Reactivity
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A ..... aa, b ..... ba). The effective Hamiltonian Heff will then have matrix elements (cf. 2) (E(O) _ E(O») a b and all other equations will be modified similarly. The presence of degeneracy also leaves the original perturbation equations unchanged. 4) must be solved in order to determine the perturbed A -set states. It is also possible to show that all elements THE MOLECULE AS A MANY -ELECTRON SYSTEM 19 may still be expressed as expectation values of the perturbation fI' with respect to first-order perturbed wavefunctions.