Ammonia | SSHADE

Molecule

	Atom	Name	Number
	$N$	Nitrogen	1
	$H$	Hydrogen	3

Relations

Isotope mixture type

terrestrial abundance

Isotopes

Molecule symmetry

C3v

Case

symmetric-top

Vibrations number

4

Vibrations

Label	Mode	Bond	Symmetry	Degeneracy	Fundamental frequency	Observed frequency	Observed frequency	Harmonic frequency	Activity IR	Activity Raman	Strength	Comments
V1	stretching sym.	$NH_3$	$A_{1}$	no	3337.0	3336.2	3337.2	3505.7	active	active	s	observed split between symmetric and antisymmetric levels
V2	bending sym.	$NH_3$	$A_{1}$	no	950.0	935.5	968.3	1022.0	active	active	vs	observed split between symmetric and antisymmetric levels
V3	stretching	$NH_3$	$E$	double	3444.0	3443.6	3443.9	3573.1	active	active	s	observed split between symmetric and antisymmetric levels
V4	deformation	$NH_3$	$E$	double	1627.0	1626.1	1627.4	1689.7	active	active	vs	observed split between symmetric and antisymmetric levels

Comments

Vibrations of the main isotope:

^{14} N H_{3}

$^{14}NH_3$ . Data from NIST Chemistry WebBook and Benedict & Plyler (1957)

Publications

Chemical bonds

	Bond	Number
	$>N-H$	3