CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference
Hfg(298.15K)	637.20	7.00	kJ mol^-1	JANAF
Hfg(0K)	631.14	7.00	kJ mol^-1	JANAF
Entropy (298.15K)	206.40	4.00	J K^-1 mol^-1	JANAF
Integrated Heat Capacity (0 to 298.15K)	9.96		kJ mol^-1	JANAF
Heat Capacity (298.15K)	27.47		J K^-1 mol^-1	webbook

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rBeBe	2.460		1	2			1984Bon/Eng:568	r0 value

Atom	x (Å)	y (Å)	z (Å)
Be1	0.0000	0.0000	0.0000
Be2	0.0000	0.0000	2.4600

	Be1	Be2
Be1		2.4600
Be2	2.4600

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
2	1	³Π_g	D_∞h	True							D_∞h	0	1

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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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
1984Bon/Eng:568	VE Bondybey, JH English, "Laser Vaporization of beryllium: Gas phase spectrum and molecular potential of Be2" J. Chem. Phys. 80, 568, 1984	10.1063/1.446434
1999Mar:399	Martin, J. "The ground-state spectroscopic constants of Be2 revisited." Chemical Physics Letters. 303, 399-407 (1999)	10.1016/S0009-2614(99)00214-6
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
webbook	NIST Chemistry Webbook (http://webbook.nist.gov/chemistry)	10.18434/T4D303

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Experimental data for Be2 (Beryllium diatomic)

Experimental data for Be₂ (Beryllium diatomic)