CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference	Comment
Entropy (298.15K)			J K^-1 mol^-1
Integrated Heat Capacity (0 to 298.15K)			kJ mol^-1

Description	Value	unc.	Connectivity				Reference	Comment
Description	Value	unc.	Atom 1	Atom 2	Atom 3	Atom 4	Reference	Comment
rCC	1.545		1	2			1976Hellwege(II/7)
rCN	1.469		1	3			1976Hellwege(II/7)
rCH	1.109		1	11			1976Hellwege(II/7)
aCCN	110.2		1	2	4		1976Hellwege(II/7)
aHCC	119.9		1	2	9		1976Hellwege(II/7)
aHCH	112.7		11	1	12		1976Hellwege(II/7)
dNCCN	64		3	1	2	4	1976Hellwege(II/7)

Bond Type	Count
H-C	4
H-N	4
C-C	1
C-N	2

Atom 1	Atom 2
C1	C2
C1	N3
C1	H11
C1	H12
C2	N4
C2	H9
C2	H10
N3	H7
N3	H8
N4	H5
N4	H6

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	¹A_g	C_2h	False							C_2h	0	3
1	2	¹A	C₂	True				1.990	NSRDS-NBS10	DR	C₂	1	3

	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
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.
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 C2H8N2 (Ethylenediamine)

Experimental data for C₂H₈N₂ (Ethylenediamine)