Formaldehyde | SSHADE

Molecule

IUPAC name: Formaldehyde
Secondary names: Methylene glycol, Methanal, Methyl aldehyde, Methylene oxide, Formol, Formic aldehyde, H2CO
InChI: InChI=1S/CH2O/c1-2/h1H2
InChI key: WSFSSNUMVMOOMR-UHFFFAOYSA-N
CAS number: 50-00-0
Comments: natural $H_2CO$

Relations

Molecule symmetry

C2v

Case

nonlinear-polyatomic

Vibrations number

6

Vibrations

Label	Mode	Bond	Symmetry	Degeneracy	Fundamental frequency	Observed frequency	Activity IR	Activity Raman	Strength	Comments
V1	stretching sym.	$>C<H_2$	$A_{1}$	no	2782.0	2782.5	active	active	s	Raman: 2781.6 $cm^{-1}$ (gas)
V2	stretching	$>C=O$	$A_{1}$	no	1746.0	1746.1	active	active	vs	Raman: 1742.3 $cm^{-1}$ (gas)
V3	bending sym. in-p (scissoring)	$>C<H_2$	$A_{1}$	no	1500.0	1500.1	active	active	s	Raman: 1499.7 $cm^{-1}$ (gas)
V4	stretching asym.	$>C<H_2$	$B_{1}$	no	2843.0	2843.1	active	active	vs	Raman: 2866 $cm^{-1}$ (gas)
V5	bending asym. in-p (rocking)	$>C<H_2$	$B_{1}$	no	1249.0	1249.1	active	active	s
V6	bending sym. out-p (wagging)	$>C<H_2$	$B_{2}$	no	1167.0	1167.3	active	active	s

Comments

Vibrations of the main isotope:

$^1H_2^{12}C^{16}O$ . Data from NIST Chemistry WebBook

Publications

Chemical functions

	Function	Number
	$R=CH_2$	1

Chemical bonds

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