It is an isocyanide and a fluorocarbon. Pivalonitrile is isomeric with "tert"-butyl isocyanide. Both "hydrogen isocyanide" and "azanylidyniummethanide" are correct IUPAC names for HNC. The Ugi reaction is exothermic and usually complete within minutes of adding the isocyanide. Dicationic complexes of Ge(II) have been isolated with bulky isocyanide and carbene ligands. The molecule contains both sulfonyl and isocyanide groups. Hz for the C nucleus which the isocyanide group is attached to. Many metal cyanides react with methylating agents to give complexes of methyl isocyanide. This reaction is used to destroy odorous isocyanide mixtures. Thus cyanometalates can be alkylated to give isocyanide complexes. Two successive base-mediated dehydrochlorination steps result in formation of the isocyanide. While some isocyanides ("e.g.," cyclohexyl isocyanide) are toxic, others "exhibit no appreciable toxicity for mammals". Hydrogen isocyanide (HNC) is a linear triatomic molecule with C point group symmetry. Methyl isocyanide or isocyanomethane is an organic compound and a member of the isocyanide family. Note that in Lieke's day, the difference between isocyanide and nitrile was not fully appreciated.