Part I. Transition Metal Organometallic Compounds. Lanthanide and early transition metal compounds. Metal carbonyl derivatives. Cyclopentadienylmetal carbonyl and nitrosyl derivatives. Compounds having two p-bonded aromatic rings. Olefin, cyclobutadiene, and acetylene metal complexes. Allyl and pentadienyl transition metal derivatives. Alkyl transition metal derivatives. Methylene and methylidyne transitional metal complexes. Transition metal complexes containing organophosphorus ligands. Transition metal derivatives containing chalcogen ligands. Organometallic derivatives containing two different transition metals. Part II. Nontransitional Organometallic Compounds. Compounds of Groups IA, IIA, IIB, IIIA, IVA, VA and VIA. Index of Metals and Ligands.