^ f L ! S .*? A -^ 



S '" 



CONTENTS ^ 



PAGE 



Participants ........... xvii 



Presidential Address ......... xxi 



The Electronic Structure and Electron Transport Properties of Metal 

 Ions Particularly in Porphyrin Complexes 



by L. E. Orgel 1 



Discussion 



Terminology in Ligancl-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 



vii 



79501 



