CCCBDB listing of experimental data page 2

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Property	Value	units	Reference
Hfg(298.15K)	-110.46	kJ mol^-1	webbook
Hfg(0K)		kJ mol^-1	webbook
Entropy (298.15K)	416.43	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	168		webbook					sym stretch
2	E	63							deg. deform
3	T₂	405							deg. stretch
4	T₂	94							deg. deform

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rSiI	2.432	0.005	1	2			1998Kol/Har:349-352	rg

Atom	x (Å)	y (Å)	z (Å)
Si1	0.0000	0.0000	0.0000
I2	1.4041	1.4041	1.4041
I3	-1.4041	-1.4041	1.4041
I4	-1.4041	1.4041	-1.4041
I5	1.4041	-1.4041	-1.4041

	Si1	I2	I3	I4	I5
Si1		2.4320	2.4320	2.4320	2.4320
I2	2.4320		3.9714	3.9714	3.9714
I3	2.4320	3.9714		3.9714	3.9714
I4	2.4320	3.9714	3.9714		3.9714
I5	2.4320	3.9714	3.9714	3.9714

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
I2	Si1	I3	109.471	I2	Si1	I4	109.471
I2	Si1	I5	109.471	I3	Si1	I4	109.471
I3	Si1	I5	109.471	I4	Si1	I5	109.471

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	T_d	True							T_d	0	0

squib	reference	DOI
1998Kol/Har:349-352	M Kolonits, M Hargittai "Molecular Structure of Silicon Tetraiodide" Structural Chemistry, 9(5), 1998, 349-352	10.1023/a:1022462926682
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

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Experimental data for SiI4 (silicon tetraiodide)

Experimental data for SiI₄ (silicon tetraiodide)