Protonated hydrogen cyanide

Protonated hydrogen cyanide
Names
IUPAC names
Methylidyneammonium,[2] Methylidyneazanium[1]
Systematic IUPAC name
Methylidyneammonium[2]
Other names
Methanimine, iminomethylcation;
1-azoniaethyne[1];
iminomethylium
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/CHN/c1-2/h1H/p+1[2]
    Key: LELOWRISYMNNSU-UHFFFAOYSA-O[2]
  • linear form (HC≡N+H): InChI=1S/CHN/c1-2/h1H/p+1[1]
    Key: LELOWRISYMNNSU-UHFFFAOYSA-O[1]
  • HC+=NH[4]: InChI=1S/CH3N/c1-2/h2H,1H2/q+1
    Key: WFXDWMNZLVWETL-UHFFFAOYSA-N
  • linear form (HC≡N+H): C#[NH+]
  • HC+=NH: [CH+]=N
  • CNH+
    2    : [CH0]=[NH2+]
  • H2CN+: C=[NH0+]
  • cis-HCNH+: [H]/[C]=[N+]\[H]
  • trans-HCNH+: [H]/[C]=[N+]/[H]
Properties
CH2N+1
Molar mass 28.033 g·mol−1
Conjugate base Hydroisocyanic acid
Structure
C∞v (linear form (HC≡N+H))
linear: HC≡N+H
Hazards
Flash point −21.3 to −43.7 °C (−6.3 to −46.7 °F; 251.8 to 229.5 K)[2]
Related compounds
ethyne
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

HCNH+, also known as protonated hydrogen cyanide, is a molecular ion of astrophysical interest. It also exists in the condensed state when formed by superacids.

  1. ^ a b c d "Methanimine". PubChem. Retrieved 27 January 2019.
  2. ^ a b c d e "Methylidyneammonium | CH2N". ChemSpider. Retrieved 27 January 2019.
  3. ^ "HCNH+". webbook.nist.gov.
  4. ^ "methanimine | CH2N". ChemSpider. Retrieved 27 January 2019.