CCCBDB listing of experimental data page 2

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Property	Value	units	Reference
Hfg(298.15K)	485.34	kJ mol^-1	webbook
Hfg(0K)		kJ mol^-1	webbook
Entropy (298.15K)	241.71	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		265	webbook

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rCuCu	2.220		1	2			webbook	re

Atom	x (Å)	y (Å)	z (Å)
Cu1	0.0000	0.0000	0.0000
Cu2	0.0000	0.0000	2.2197

	Cu1	Cu2
Cu1		2.2197
Cu2	2.2197

	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							D_∞h	0	1
2	1	¹Π	D_∞h	True							D_∞h	0	1

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Experimental data for Cu2 (Copper diatomic)

Experimental data for Cu₂ (Copper diatomic)