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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-189.977042
Energy at 298.15K-189.987407
HF Energy-189.288002
Nuclear repulsion energy131.078068
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at QCISD/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3478 3337 0.00      
2 Ag 3039 2916 0.00      
3 Ag 1672 1604 0.00      
4 Ag 1485 1425 0.00      
5 Ag 1420 1362 0.00      
6 Ag 1155 1108 0.00      
7 Ag 1108 1063 0.00      
8 Ag 906 869 0.00      
9 Ag 468 449 0.00      
10 Au 3558 3414 1.31      
11 Au 3100 2974 78.25      
12 Au 1414 1356 3.02      
13 Au 1086 1042 0.82      
14 Au 764 733 0.09      
15 Au 294 282 99.16      
16 Au 154 148 0.34      
17 Bg 3559 3414 0.00      
18 Bg 3075 2950 0.00      
19 Bg 1389 1332 0.00      
20 Bg 1311 1258 0.00      
21 Bg 959 920 0.00      
22 Bg 328 315 0.00      
23 Bu 3478 3336 4.08      
24 Bu 3042 2919 91.48      
25 Bu 1670 1602 33.75      
26 Bu 1501 1440 0.25      
27 Bu 1337 1282 38.82      
28 Bu 1118 1072 5.97      
29 Bu 958 919 317.28      
30 Bu 277 266 17.49      

Unscaled Zero Point Vibrational Energy (zpe) 24550.4 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 23553.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at QCISD/cc-pVDZ
ABC
0.86421 0.12444 0.11760

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.399 0.658 0.000
C2 -0.399 -0.658 0.000
N3 -0.399 1.890 0.000
N4 0.399 -1.890 0.000
H5 1.029 -1.862 0.809
H6 1.029 -1.862 -0.809
H7 -1.029 1.862 0.809
H8 -1.029 1.862 -0.809
H9 -1.064 -0.677 -0.887
H10 -1.064 -0.677 0.887
H11 1.064 0.677 -0.887
H12 1.064 0.677 0.887

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.53891.46822.54752.72042.72042.03582.03582.17062.17061.10861.1086
C21.53892.54751.46822.03582.03582.72042.72041.10861.10862.17062.1706
N31.46822.54753.86304.09524.09521.02561.02562.79622.79622.09732.0973
N42.54751.46823.86301.02561.02564.09524.09522.09732.09732.79622.7962
H52.72042.03584.09521.02561.61884.25464.55212.94292.40633.05412.5409
H62.72042.03584.09521.02561.61884.55214.25462.40632.94292.54093.0541
H72.03582.72041.02564.09524.25464.55211.61883.05412.54092.94292.4063
H82.03582.72041.02564.09524.55214.25461.61882.54093.05412.40632.9429
H92.17061.10862.79622.09732.94292.40633.05412.54091.77342.52343.0843
H102.17061.10862.79622.09732.40632.94292.54093.05411.77343.08432.5234
H111.10862.17062.09732.79623.05412.54092.94292.40632.52343.08431.7734
H121.10862.17062.09732.79622.54093.05412.40632.94293.08432.52341.7734

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.784 C1 C2 H9 109.058
C1 C2 H10 109.058 C1 N3 H7 108.126
C1 N3 H8 108.126 C2 C1 N3 115.784
C2 C1 H11 109.058 C2 C1 H12 109.058
C2 N4 H5 108.126 C2 N4 H6 108.126
N3 C1 H11 108.146 N3 C1 H12 108.146
N4 C2 H9 108.146 N4 C2 H10 108.146
H5 N4 H6 104.223 H7 N3 H8 104.223
H9 C2 H10 106.229 H11 C1 H12 106.229
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability