Molecule
Name
Formamide
IUPAC name
Methanamide
Secondary names
Carbamaldehyde, Methanamide, HCONH2, CH3NO
InChI
InChI=1S/CH3NO/c2-1-3/h1H,(H2,2,3)
InChI key
ZHNUHDYFZUAESO-UHFFFAOYSA-N
CAS number
75-12-7
Structure and atomic composition
Formula
$HCONH_2$
Chemical formula
HCONH2
Structural formula
O=[CH][NH2]
Charge
0
Unpaired electrons
0
  Atom Name Number
$H$ Hydrogen 3
$C$ Carbon 1
$O$ Oxygen 1
$N$ Nitrogen 1
Relations
  • no
Isotope mixture type
terrestrial abundance
Spin type
unknown
Molar mass
45.04 $g/mol$
State STP
liquid
Protic
protic
Polarity
polar
Dipole
3.73 $D$
Molecule symmetry
Cs
Case
nonlinear-polyatomic
Vibrations number
12
Vibrations
Label Mode Bond Symmetry Degeneracy Fundamental frequency Observed frequency Observed frequency Harmonic frequency Activity IR Activity Raman Strength Comments
V1 stretching sym. $-O-H$ $A_{1}'$ no 3570.0 active inactive m
V2 stretching sym. $\eqslantgtr C-H$ $A_{1}'$ no 2943.0 2942.8 active inactive m
V3 stretching sym. $>C=O$ $A_{1}'$ no 1770.0 active inactive vs
V4 stretching sym. $\eqslantgtr C-H$ $A_{1}'$ no 1387.0 1387.0 active inactive vw
V5 bending sym. $-O-H$ $A_{1}'$ no 1229.0 1229.0 active inactive w
V6 stretching sym. $\eqslantgtr C-O-$ $A_{1}'$ no 1248.0 active inactive s
V7 deformation $HCONH_2$ $A_{1}'$ no 625.0 625.0 active inactive m
V8 bending $\eqslantgtr C-H$ $A_{1}"$ no 942.0 active inactive w
V9 deformation $HCONH_2$ $A_{1}"$ no 638.0 active inactive s
Chemical bonds
  Bond Number
$\eqslantgtr C-H$ 1
$>C=O$ 1
$\eqslantgtr C-N<$ 1
$>N-H$ 2