Oosterhoff

Kaptein R and Oosterhoff J L 1969 Chemically Induced dynamic polarization II (relation with anomalous ESR spectra) Chem. Phys. Lett. 4 195-7... 

The authors are grateful to Messrs. J. H. de Baas, D. Kok, and H. J. van Haren for the patience with which they helped in measuring equilibria involving clathrates. They further wish to thank Ir. C. M. van Battum and Prof. Dr. L. J. Oosterhoff for valuable suggestions concerning the presentation of this review. 

The origin of CIDNP lies in the microscopic behaviour of radical pairs. Our discussion of this will follow fairly closely the model approach associated with the names of Gloss, Kaptein, OosterhofF, and Adrian, rather than the more formal kinetic treatments of Fischer (1970a) and Buchachenko et al. (1970b). 

Oosterhoff correlation diagram, conical intersection research, 494-496... 

Es scheint, als ob der Ablauf der erwahnten spezifischen Reaktionen von einem Symmetrieprinzip diktiert wird. L. J. Oosterhoff ) auBerte wohl erstmals fiir eine dieser Reaktionen die Vermutung, daB die Symmetrie... 

Oosterhoff (1969), Michl (1974), Dauben et al. (1975), Salem et al. (1975), Fukui (1975), Epiotis (1978) and Warshel and Weiss (1980) though this list is no more than a selection of many relevant papers. The essence of the approach is to use electronic configurations as the building blocks from which the entire reaction profile, including ground states, intermediates and transition states, may be generated. 

The reason that thermally allowed reactions are photochemically forbidden and vice versa also becomes more readily apparent (van der Lugt and Oosterhoff, 1969). As we have just noted the existence of a large ground state barrier for a particular reaction (i.e. the reaction is thermally forbidden ) implies that there is another potential surface of the same symmetry that has a well not far above this barrier (as in Fig. 21a). Photoinduced reactions may occur through the funnelling of the reaction complex from the excited surface well on to the ground state surface in a radiationless transition. Since the... 

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