States in Vectoselective Processes

The reaction at a paired set of molecular faces, in principle, may proceed through four pathways that lead to a quartet of conjimctive states m, mi., m,-. This was shown in the discussion on facioselectivity (Chapter 12). 

The 45 quartets generated from the analysis of a wide variety of (l,2)-atom-face, (2,2)-bond-face 

Vectoselectivity may also be given as a ratio (see Volume 1, Addendum B, p. 149)  

Quartets ql,q2,q5,q22,q23,q30 typify avectoselective processes. Operationally, in an avectoselective transformation, the conjimctive state(s) obtained from a given orientational mode at a molecular face is(are) exactly identical (in structure and relative amounts) with that (those) 

The quantitative expressions for vectoselectivity for the five subclasses are as follows  

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