CONTENTS '^•^^^J^ 



PAGE 



Participants . . xv 



Presidential Address ......... xix 



The Electronic Structure and Electron Transport Properties of Metal 

 Ions Particularly in Porphyrin Complexes 

 by L. E, Orgel I 



Discussion 



Terminology in Ligand-Field Theory . . . . . .13 



Spin States of Haem Compounds. . . . . . .15 



Electron Transport . . . . . . . . .16 



Mechanism of Oxidative Phosphorylation . . . . .18 



The Role of the Metal in Porphyrin Complexes 



by F. P. DwYER 19 



Discussion 



Higher Oxidation States ........ 27 



Effects of Metal on Reactivity at Periphery . . . . .28 



The Physico-Chemical Behaviour of Porphyrins Solubilized in Aqueous 

 Detergent Solutions 

 by B. Dempsey, M. B. Lowe and J. N. Phillips . . . .29 



Discussion 



Cations of Porphyrins and Their Spectra . . . . .37 



The Reactions Between Metal Ions and Porphyrins 



by J. H. Wang and E. B. Fleischer 38 



Some Physical Properties and Chemical Reactions of Iron Complexes 

 by R. J. P. Williams . 41 



Discussion 



Oxidation-Reduction Potentials of Haem Compounds . . . .53 



V 



7um 



