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: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-188.617046
Energy at 298.15K-188.627269
HF Energy-188.212514
Nuclear repulsion energy129.839585
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 MP2=FULL/3-21G*
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 3428 3249 0.00      
2 Ag 3077 2917 0.00      
3 Ag 1759 1668 0.00      
4 Ag 1572 1490 0.00      
5 Ag 1429 1354 0.00      
6 Ag 1117 1058 0.00      
7 Ag 1010 957 0.00      
8 Ag 781 741 0.00      
9 Ag 459 436 0.00      
10 Au 3530 3346 1.82      
11 Au 3144 2980 59.41      
12 Au 1434 1359 3.60      
13 Au 1113 1055 0.24      
14 Au 769 729 0.57      
15 Au 292 277 139.36      
16 Au 154 146 0.47      
17 Bg 3530 3346 0.00      
18 Bg 3117 2955 0.00      
19 Bg 1413 1340 0.00      
20 Bg 1355 1284 0.00      
21 Bg 966 916 0.00      
22 Bg 319 303 0.00      
23 Bu 3427 3249 2.92      
24 Bu 3085 2924 64.86      
25 Bu 1759 1668 36.93      
26 Bu 1590 1507 1.47      
27 Bu 1369 1298 7.65      
28 Bu 1074 1018 17.16      
29 Bu 803 761 492.83      
30 Bu 264 250 20.49      

Unscaled Zero Point Vibrational Energy (zpe) 24568.2 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 23290.7 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 MP2=FULL/3-21G*
ABC
0.85744 0.12107 0.11469

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.410 0.661 0.000
C2 -0.410 -0.661 0.000
N3 -0.410 1.908 0.000
N4 0.410 -1.908 0.000
H5 1.001 -1.956 0.834
H6 1.001 -1.956 -0.834
H7 -1.001 1.956 0.834
H8 -1.001 1.956 -0.834
H9 -1.057 -0.680 -0.885
H10 -1.057 -0.680 0.885
H11 1.057 0.680 -0.885
H12 1.057 0.680 0.885

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.55511.49262.56852.80892.80892.08912.08912.17542.17541.09641.0964
C21.55512.56851.49262.08912.08912.80892.80891.09641.09642.17542.1754
N31.49262.56853.90284.19694.19691.02341.02342.81052.81052.10782.1078
N42.56851.49263.90281.02341.02344.19694.19692.10782.10782.81052.8105
H52.80892.08914.19691.02341.66764.39424.70002.96962.42213.14712.6367
H62.80892.08914.19691.02341.66764.70004.39422.42212.96962.63673.1471
H72.08912.80891.02344.19694.39424.70001.66763.14712.63672.96962.4221
H82.08912.80891.02344.19694.70004.39421.66762.63673.14712.42212.9696
H92.17541.09642.81052.10782.96962.42213.14712.63671.77012.51353.0742
H102.17541.09642.81052.10782.42212.96962.63673.14711.77013.07422.5135
H111.09642.17542.10782.81053.14712.63672.96962.42212.51353.07421.7701
H121.09642.17542.10782.81052.63673.14712.42212.96963.07422.51351.7701

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 114.850 C1 C2 H9 109.032
C1 C2 H10 109.032 C1 N3 H7 110.886
C1 N3 H8 110.886 C2 C1 N3 114.850
C2 C1 H11 109.032 C2 C1 H12 109.032
C2 N4 H5 110.886 C2 N4 H6 110.886
N3 C1 H11 108.022 N3 C1 H12 108.022
N4 C2 H9 108.022 N4 C2 H10 108.022
H5 N4 H6 109.126 H7 N3 H8 109.126
H9 C2 H10 107.652 H11 C1 H12 107.652
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability