The Nobel Prize in Chemistry 1973 was awarded jointly to Ernst Otto Fischer and Geoffrey Wilkinson "for their pioneering work, performed independently, on the chemistry of the organometallic, so called sandwich compounds".
 

Organometallic chemistry is the study of chemical compounds containing bonds between carbon and a metal. The basic concept of organometallic chemistry was from 1949 and onwards widened through important contributions by the two British chemists Dewar and Chatt and a number of other scientists who investigated compounds where a metal atom was bonded to a bond between two carbon atoms rather than to the individual carbon atoms.