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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-189.811608
Energy at 298.15K-189.821993
HF Energy-189.266011
Nuclear repulsion energy132.051578
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/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 3603 3335 0.00      
2 Ag 3140 2907 0.00      
3 Ag 1772 1640 0.00      
4 Ag 1579 1462 0.00      
5 Ag 1492 1381 0.00      
6 Ag 1184 1096 0.00      
7 Ag 1138 1054 0.00      
8 Ag 912 844 0.00      
9 Ag 483 447 0.00      
10 Au 3689 3415 0.09      
11 Au 3198 2961 77.77      
12 Au 1469 1360 1.56      
13 Au 1123 1040 0.40      
14 Au 790 731 0.21      
15 Au 284 263 131.43      
16 Au 156 144 0.26      
17 Bg 3690 3416 0.00      
18 Bg 3172 2937 0.00      
19 Bg 1443 1336 0.00      
20 Bg 1374 1272 0.00      
21 Bg 991 917 0.00      
22 Bg 316 293 0.00      
23 Bu 3601 3333 0.28      
24 Bu 3144 2911 86.41      
25 Bu 1770 1638 58.53      
26 Bu 1595 1476 0.77      
27 Bu 1402 1298 28.98      
28 Bu 1152 1066 11.77      
29 Bu 955 884 444.98      
30 Bu 290 268 21.34      

Unscaled Zero Point Vibrational Energy (zpe) 25451.9 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 23563.4 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/6-31G*
ABC
0.88257 0.12577 0.11898

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.398 0.653 0.000
C2 -0.398 -0.653 0.000
N3 -0.398 1.874 0.000
N4 0.398 -1.874 0.000
H5 1.004 -1.894 0.810
H6 1.004 -1.894 -0.810
H7 -1.004 1.894 0.810
H8 -1.004 1.894 -0.810
H9 -1.053 -0.677 -0.874
H10 -1.053 -0.677 0.874
H11 1.053 0.677 -0.874
H12 1.053 0.677 0.874

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.52921.45762.52732.74062.74062.04002.04002.15312.15311.09261.0926
C21.52922.52731.45762.04002.04002.74062.74061.09261.09262.15312.1531
N31.45762.52733.83214.10144.10141.01221.01222.77492.77492.07422.0742
N42.52731.45763.83211.01221.01224.10144.10142.07422.07422.77492.7749
H52.74062.04004.10141.01221.62094.28714.58332.92392.39053.07392.5718
H62.74062.04004.10141.01221.62094.58334.28712.39052.92392.57183.0739
H72.04002.74061.01224.10144.28714.58331.62093.07392.57182.92392.3905
H82.04002.74061.01224.10144.58334.28711.62092.57183.07392.39052.9239
H92.15311.09262.77492.07422.92392.39053.07392.57181.74872.50253.0530
H102.15311.09262.77492.07422.39052.92392.57183.07391.74873.05302.5025
H111.09262.15312.07422.77493.07392.57182.92392.39052.50253.05301.7487
H121.09262.15312.07422.77492.57183.07392.39052.92393.05302.50251.7487

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.565 C1 C2 H9 109.284
C1 C2 H10 109.284 C1 N3 H7 110.067
C1 N3 H8 110.067 C2 C1 N3 115.565
C2 C1 H11 109.284 C2 C1 H12 109.284
C2 N4 H5 110.067 C2 N4 H6 110.067
N3 C1 H11 107.997 N3 C1 H12 107.997
N4 C2 H9 107.997 N4 C2 H10 107.997
H5 N4 H6 106.395 H7 N3 H8 106.395
H9 C2 H10 106.315 H11 C1 H12 106.315
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability