CCCBDB listing of experimental data page 2

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Mode Number	Symmetry	Frequency			Intensity			Comment	Description
Mode Number	Symmetry	Fundamental(cm^-1)	Harmonic(cm^-1)	Reference	(km mol^-1)	unc.	Reference	Comment	Description
1	A₁	2974		webbook					CH₂ s-stretch
2	A₁	2202		webbook					CD₂ s-stretch
3	A₁	1436		webbook					CH₂ scissors
4	A₁	1033		webbook					CD₂ scissors
5	A₂	1333		webbook				3013	CH₂ twist
6	B₁	2234		webbook				B1 and B2 switched	CD₂ a-stretch
7	B₁	1234		webbook				B1 and B2 switched	CH₂ wag
8	B₂	3013		webbook				B1 and B2 switched	CH₂ a-stretch
9	B₂	1090		webbook				B1 and B2 switched	CH₂ rock

Bond Type	Count
H-C	2
D-C	2

Atom 1	Atom 2
C1	H2
C1	H3
C1	D4
C1	D5

State	Config	State description	Conf description	Exp. min.	Dipole (Debye)				Reference	comment	Point Group	Components
State	Config	State description	Conf description	Exp. min.	x	y	z	total	Reference	comment	Point Group	dipole	quadrupole
1	1	¹A₁	C_2v	True							C_2v	1	2

State	Config	State description	Conf description	Exp. min.	Quadrupole (D Å)			Reference	comment	Point Group	Components
State	Config	State description	Conf description	Exp. min.	xx	yy	zz	Reference	comment	Point Group	dipole	quadrupole
1	1	¹A₁	C_2v	True						C_2v	1	2

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Experimental data for CH2D2 (methane-d2)

Experimental data for CH₂D₂ (methane-d2)