Formamide | SSHADE

Molecule

Name: Formamide

Name and identifiers

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

Isotopic composition

Isotope mixture type: terrestrial abundance

Nuclear spin isomers

Spin type: unknown

Molar mass: 45.04 $g/mol$
State STP: liquid
Protic: protic
Polarity: polar
Dipole: 3.73 $D$

Fundamental vibration modes

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 functions and bonds

Chemical bonds

	Bond	Number
	$\eqslantgtr C-H$	1
	$>C=O$	1
	$\eqslantgtr C-N<$	1
	$>N-H$	2