A General SCF Theory

We live in a molecular world, almost closed shell in nature, and for this reason Chemistry has been a science dealing with closed shell mol­ ecules. However, the high degree of experimental sophistication reached in the past decade has made more apparent the role of open shell structures in chemical research. A parallel phenomenon can be observed in the development of SCF theory, where closed shell molecular calculations at any level of complexity compose the main body of references which c...