CCCBDB listing of experimental data page 2

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Property	Value	units	Reference
Hfg(298.15K)	20.92	kJ mol^-1	webbook
Hfg(0K)		kJ mol^-1	webbook
Entropy (298.15K)	244.06	J K^-1 mol^-1	webbook

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	Σ_g	2436		webbook
2	Σ_g	787
3	Σ_u	1350
4	Π_g	270
5	Π_u	268

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rCC	1.187	0.001	1	2			1995Kuchitsu(II/23)
rCF	1.283	0.001	2	3			1995Kuchitsu(II/23)

Bond Type	Count
C#C	1
C-F	2

Atom 1	Atom 2
C1	C2
C1	F3
C2	F4

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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You are here: Experimental > One molecule all properties

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	¹Σ_g	D_∞h	True							D_∞h	0	1

squib	reference	DOI
1995Kuchitsu(II/23)	Kuchitsu (ed.), Landolt-Bornstein: Group II: Molecules and Radicals Volume 23: Structure Data for Free Polyatomic Molecules. Springer. Berlin. 1995
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

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Experimental data for C2F2 (difluoroacetylene)

Experimental data for C₂F₂ (difluoroacetylene)