CCCBDB listing of experimental data page 2

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Property	Value	units	Reference
Hfg(298.15K)	-587.85	kJ mol^-1	webbook
Hfg(0K)		kJ mol^-1	webbook
Entropy (298.15K)	256.58	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	A₁	855		webbook					SiF₂ sym str
2	A₁	345		webbook					SiF₂ sciss
3	B₂	870		webbook					SiF₂ asym str

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rFSi	1.590	0.000	1	2			1976Hellwege(II/7)	re
aFSiF	100.77	0.02	2	1	3		1976Hellwege(II/7)

Atom	y (Å)	z (Å)
Si1	0.0000	0.5703
F2	1.2249	-0.4436
F3	-1.2249	-0.4436

	Si1	F2	F3
Si1		1.5901	1.5901
F2	1.5901		2.4499
F3	1.5901	2.4499

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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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				1.230	NSRDS-NBS10	MW +-0.015 D μ₀	C_2v	1	2
2	1	³B₁	C_2v	True							C_2v	1	2

squib	reference	DOI
1976Hellwege(II/7)	Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.
NISTtriatomic	NIST Triatomic Spectral Database (http://www.physics.nist.gov/PhysRefData/MolSpec/Triatomic/index.html)	10.18434/T4DW2S
NSRDS-NBS10	R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967	10.6028/NBS.NSRDS.10
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

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Experimental data for SiF2 (Silicon difluoride)

Experimental data for SiF₂ (Silicon difluoride)