Add to ORKGI would like to express my sincere appreciation to my Supervisor, Dr. G.A. Rodley, for his considerate super-vision, patience, enthusiasm, help, advice and encouragement throughout the course of this work. I am grateful to Dr. v. McKee for her assistance in the X-ray structural work and Dr. C. Tomblin of the Physics Department for work on Resonance Raman as well as Circularly Po sed Light. I am also indebted to Dr. C. Winterbourn of the Clinical School, Christchurch Hospital, and Miss C. Miles of the Physics Department for their helpful discussions. Thanks are also due to Miss Cheah Siew Hoong and Miss Jan zabeth Gregor for proof-reading this thesis. I am also grateful to my family for their financial and moral support throughou