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	A_g	1535		webbook					C=C str
2	A_g	265							CBr₂ s-str
3	A_g	144							CBr₂ sciss
4	A_u	66							CBr₂ twist
5	B_1u	635						B3U	CBr₂ s-str
6	B_1u	188						B3U	CBr₂ sciss
7	B_2g	464							CBr₂ wag
8	B_2u	766							CBr₂ a-str
9	B_2u	119							CBr₂ rock
10	B_3g	880						B1G	CBr₂ a-str
11	B_3g	208						B1G	CBr₂ rock
12	B_3u	245						B1U	CBr₂ wag

Bond Type	Count
C=C	1
C-Br	4

Atom 1	Atom 2
C1	C2
C1	Br3
C1	Br4
C2	Br5
C2	Br6

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	¹A_G	D_2h	True							D_2h	0	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	¹A_G	D_2h	True						D_2h	0	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 C2Br4 (tetrabromoethene)

Experimental data for C₂Br₄ (tetrabromoethene)