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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-188.599054
Energy at 298.15K-188.609307
Nuclear repulsion energy130.305971
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 CISD/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 3500 3295 0.00      
2 Ag 3104 2922 0.00      
3 Ag 1785 1681 0.00      
4 Ag 1587 1494 0.00      
5 Ag 1454 1368 0.00      
6 Ag 1127 1061 0.00      
7 Ag 1031 971 0.00      
8 Ag 780 734 0.00      
9 Ag 468 441 0.00      
10 Au 3592 3381 1.04      
11 Au 3162 2976 62.99      
12 Au 1451 1366 2.77      
13 Au 1123 1057 0.13      
14 Au 777 731 0.58      
15 Au 286 269 139.51      
16 Au 153 144 0.55      
17 Bg 3592 3382 0.00      
18 Bg 3133 2949 0.00      
19 Bg 1430 1346 0.00      
20 Bg 1368 1288 0.00      
21 Bg 975 918 0.00      
22 Bg 311 293 0.00      
23 Bu 3497 3292 2.29      
24 Bu 3109 2926 70.32      
25 Bu 1785 1681 41.46      
26 Bu 1604 1510 1.66      
27 Bu 1390 1309 7.68      
28 Bu 1087 1024 11.16      
29 Bu 802 755 540.76      
30 Bu 272 257 20.55      

Unscaled Zero Point Vibrational Energy (zpe) 24868.3 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 23408.5 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 CISD/3-21G
ABC
0.86213 0.12204 0.11560

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.410 0.659 0.000
C2 -0.410 -0.659 0.000
N3 -0.410 1.897 0.000
N4 0.410 -1.897 0.000
H5 0.992 -1.964 0.832
H6 0.992 -1.964 -0.832
H7 -0.992 1.964 0.832
H8 -0.992 1.964 -0.832
H9 -1.057 -0.678 -0.882
H10 -1.057 -0.678 0.882
H11 1.057 0.678 -0.882
H12 1.057 0.678 0.882

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.55141.48502.55602.81272.81272.08832.08832.17162.17161.09401.0940
C21.55142.55601.48502.08832.08832.81272.81271.09401.09402.17162.1716
N31.48502.55603.88214.19144.19141.01781.01782.79842.79842.10082.1008
N42.55601.48503.88211.01781.01784.19144.19142.10082.10082.79842.7984
H52.81272.08834.19141.01781.66454.40084.70512.96432.41903.15072.6440
H62.81272.08834.19141.01781.66454.70514.40082.41902.96432.64403.1507
H72.08832.81271.01784.19144.40084.70511.66453.15072.64402.96432.4190
H82.08832.81271.01784.19144.70514.40081.66452.64403.15072.41902.9643
H92.17161.09402.79842.10082.96432.41903.15072.64401.76382.51153.0690
H102.17161.09402.79842.10082.41902.96432.64403.15071.76383.06902.5115
H111.09402.17162.10082.79843.15072.64402.96432.41902.51153.06901.7638
H121.09402.17162.10082.79842.64403.15072.41902.96433.06902.51151.7638

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 114.642 C1 C2 H9 109.129
C1 C2 H10 109.129 C1 N3 H7 111.737
C1 N3 H8 111.737 C2 C1 N3 114.642
C2 C1 H11 109.129 C2 C1 H12 109.129
C2 N4 H5 111.737 C2 N4 H6 111.737
N3 C1 H11 108.131 N3 C1 H12 108.131
N4 C2 H9 108.131 N4 C2 H10 108.131
H5 N4 H6 109.711 H7 N3 H8 109.711
H9 C2 H10 107.441 H11 C1 H12 107.441
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability