Sidgwick

N. V. Sidgwick, The Organic Chemistry of Nitrogen, Oxford University Press, New York, 1966, p. 228. 

N. V. Sidgwick, Chemical Elements and Their Compounds, Clarendon Press, Oxford, U.K., 1950. 

LEY, WILLY, Dragons in Amber, Sidgwick and Jackson, London (1951) Pliny, Book 37, Chapter 3... 

Complexes with chelating organic reagents such as salicylaldehyde and -diketonales were first prepared by N. V. Sidgwick and his students in 1925, and many more have since been characterized, Stability, as measured by equilibrium formation conslanis, is rather low and almost invariably decreases in the sequence Lj > Na > K. This situation changed drainalically in 1967 w hen C. J. Pedersen announced the synthesis of several macrocyclie polyethers which were shown to form stable complexes with... 

T. W. J. Taylor and W. Baker, Sidgwick s Organic Chemistry of Nitrogen," p. 169. Oxford Univ. Press (Clarendon), London, 1945. 

The major features of molecular geometry can be predicted on the basis of a quite simple principle—electron-pair repulsion. This principle is the essence of the valence-shell electron-pair repulsion (VSEPR) model, first suggested by N. V. Sidgwick and H. M. Powell in 1940. It was developed and expanded later by R. J. Gillespie and R. S. Nyholm. According to the VSEPR model, the valence electron pairs surrounding an atom repel one another. Consequently, the orbitals containing those electron pairs are oriented to be as far apart as possible. 

The VSEPR model was first explored by the British chemists Nevil Sidgwick and Herbert Powell and has been developed by the Canadian chemist Ronald Gillespie. 

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