Coordination chemistry of CNH, the simplest isocyanide

The coordination chemistry of hydrogen isocyanide (CNH), the simplest isocyanide, is presented, comprehending the syntheses of its complexes (by N-protonation of cyanide or trimethylsilyl cyanide derived species, eventually in competition with hydrogen-bond formation), electronic and structural features, hydrogen-bond formation, deprotonation (to give cyanide, isocyanotrifluoroborate or isocyanotriphenylborate species), protonation (to form the aminocarbyne CNH2 species), addition (with epoxides), multicomponent cycloaddition and condensation reactions applied to organic syntheses.