This chapter contains sections titled: Introduction Structural Data on Nitrxle Oxides Nitrile-Oxide-Forming Reactions Nitrile-Oxide-Isocyanate Rearrangement Dimerization and Polymerization of Nitrile Oxides 1,3-Dipolar Cycloaddition Reaction of Nitrile Oxides with Oxygen, Nitrogen and Carbon Nucleophiles Reaction of Nitrile Oxides with Electrophiles Nitrile Sulphides Nitrile Selenides Acknowledgements References