Dynamic stereochemistry, defined

For the reaction A + BC AB + C, the partition of the total angular momentum J between the initial and flnal momentum of the colliding particles L, V and the rotational momenta of the reactant and product molecules j,f has been shown to be very useful in the diagnosis of the reaction dynamics. The main problem is that even if one lets two molecular beams collide with well-defined speeds and directions, one cannot select the impact parameter and its azimuthal orientation about the initial relative velocity vector. A currently popular way to circumvent this lack of resolution is to use vector correlations, particularly in laser studies, photofragmentation dynamics and, more generally, the so-called field of dynamical stereochemistry . One of the most commonly used correlations is that between the product rotation angular momentum and the initial and final relative velocity vectors. 

High resolution nuclear magnetic resonance is the most effective structural technique for studies in solution. Although in some ideal cases, such studies can define structure and stereochemistry, it is not possible to obtain structural parameters by this method. Nuclear magnetic resonance techniques have proved to be an excellent method for studying dynamic processes in clusters. 

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