CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference	Comment
Hfg(298.15K)	287.63	0.08	kJ mol^-1	JANAF	Gurvich slightly different
Hfg(0K)	288.16	0.08	kJ mol^-1	JANAF	Gurvich slightly different
Entropy (298.15K)	240.19	0.50	J K^-1 mol^-1	JANAF
Integrated Heat Capacity (0 to 298.15K)	9.46		kJ mol^-1	JANAF	Gurvich slitghtly different
Heat Capacity (298.15K)	24.29		J K^-1 mol^-1	JANAF	Gurvich slitghtly different

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	48	51	1979HUB/HER

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rMgMg	3.891		1	2			1979HUB/HER	re

Atom	x (Å)	y (Å)	z (Å)
Mg1	0.0000	0.0000	0.0000
Mg2	0.0000	0.0000	3.8905

	Mg1	Mg2
Mg1		3.8905
Mg2	3.8905

	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	¹Σ_g	D_∞h	True				0.000	NSRDS-NBS10		D_∞h	0	1

squib	reference	DOI
1979HUB/HER	Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Co., 1979	10.1007/978-1-4757-0961-2
2007Iri:389	KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007	10.1063/1.2436891
JANAF	Chase, M.W., Jr.; Davies, C.A.; Downey, J.R., Jr.; Frurip, D.J.; McDonald, R.A.; Syverud, A.N., JANAF Thermochemical Tables (Third Edition), J. Phys. Chem. Ref. Data,Suppl. 1, 1985, 14, 1.
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

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Experimental data for Mg2 (Magnesium diatomic)

Experimental data for Mg₂ (Magnesium diatomic)