This annual review of the literature provides a comprehensive and critical survey of a vast field of study involving organophosphorus compounds, ranging from phosphines, their chalcogenide derivatives and phosphonium salts, phosphorus (III) acid derivatives, phosphorus (V) acids, penta- and hexa-coordinated phosphorus compounds, phosphazenes and related phosphorus-nitrogen bonded compounds. Coverage in applications as reagents in green synthetic procedures is also given. With an emphasis on interdisciplinary content, this book will appeal to the worldwide organic chemistry and engineering research communities.