return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: QCISD/6-31G**

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/6-31G**
 hartrees
Energy at 0K-189.975034
Energy at 298.15K-189.985372
HF Energy-189.286147
Nuclear repulsion energy131.648679
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/6-31G**
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 3548 3340 0.00      
2 Ag 3089 2908 0.00      
3 Ag 1712 1612 0.00      
4 Ag 1541 1451 0.00      
5 Ag 1453 1368 0.00      
6 Ag 1157 1089 0.00      
7 Ag 1108 1043 0.00      
8 Ag 891 839 0.00      
9 Ag 471 444 0.00      
10 Au 3638 3425 0.87      
11 Au 3151 2967 76.70      
12 Au 1435 1350 1.99      
13 Au 1098 1034 0.76      
14 Au 771 726 0.02      
15 Au 286 269 119.41      
16 Au 155 146 0.23      
17 Bg 3639 3426 0.00      
18 Bg 3126 2943 0.00      
19 Bg 1410 1328 0.00      
20 Bg 1344 1265 0.00      
21 Bg 968 911 0.00      
22 Bg 318 299 0.00      
23 Bu 3548 3340 2.23      
24 Bu 3094 2913 85.59      
25 Bu 1710 1610 44.81      
26 Bu 1558 1467 0.12      
27 Bu 1368 1288 31.64      
28 Bu 1120 1054 6.52      
29 Bu 935 880 387.75      
30 Bu 281 264 20.26      

Unscaled Zero Point Vibrational Energy (zpe) 24961.5 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 23498.8 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/6-31G**
ABC
0.87766 0.12492 0.11816

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.399 0.655 0.000
C2 -0.399 -0.655 0.000
N3 -0.399 1.883 0.000
N4 0.399 -1.883 0.000
H5 1.012 -1.884 0.810
H6 1.012 -1.884 -0.810
H7 -1.012 1.884 0.810
H8 -1.012 1.884 -0.810
H9 -1.054 -0.677 -0.877
H10 -1.054 -0.677 0.877
H11 1.054 0.677 -0.877
H12 1.054 0.677 0.877

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.53361.46502.53822.73442.73442.03892.03892.15662.15661.09441.0944
C21.53362.53821.46502.03892.03892.73442.73441.09441.09442.15662.1566
N31.46502.53823.85044.10364.10361.01551.01552.78402.78402.08212.0821
N42.53821.46503.85041.01551.01554.10364.10362.08212.08212.78402.7840
H52.73442.03894.10361.01551.61944.27714.57352.92712.39343.06642.5618
H62.73442.03894.10361.01551.61944.57354.27712.39342.92712.56183.0664
H72.03892.73441.01554.10364.27714.57351.61943.06642.56182.92712.3934
H82.03892.73441.01554.10364.57354.27711.61942.56183.06642.39342.9271
H92.15661.09442.78402.08212.92712.39343.06642.56181.75362.50413.0570
H102.15661.09442.78402.08212.39342.92712.56183.06641.75363.05702.5041
H111.09442.15662.08212.78403.06642.56182.92712.39342.50413.05701.7536
H121.09442.15662.08212.78402.56183.06642.39342.92713.05702.50411.7536

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.639 C1 C2 H9 109.160
C1 C2 H10 109.160 C1 N3 H7 109.226
C1 N3 H8 109.226 C2 C1 N3 115.639
C2 C1 H11 109.160 C2 C1 H12 109.160
C2 N4 H5 109.226 C2 N4 H6 109.226
N3 C1 H11 108.005 N3 C1 H12 108.005
N4 C2 H9 108.005 N4 C2 H10 108.005
H5 N4 H6 105.760 H7 N3 H8 105.760
H9 C2 H10 106.487 H11 C1 H12 106.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability