Thisthesis gives a thorough account of the development of iron-catalysedhydrosilylation, hydroboration and hydromagnesiation reactions. Withextraordinary referencing and scientific argument, Mark Greenhalgh describesthe development of methodologies which require only commercially availablematerials and non-specialised techniques. The intention of this approach is toensure the science can be adopted widely by the chemical community. In additionto an insight into the processes involved in methodology development, Greenhalghdiscusses and determines the relevant reaction mechanisms. This thesis providesnot only the most thorough review of the area, but offers a level of insightwell beyond that expected from a Ph.D. student. The work in this thesis hasbeen published at the highest level, and the results and ideas have led to 3industry-funded Ph.D. studentships and grant income in excess of £1 million.