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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-189.903181
Energy at 298.15K-189.913504
HF Energy-189.264381
Nuclear repulsion energy131.285246
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 3468 3303 0.00      
2 Ag 3049 2903 0.00      
3 Ag 1728 1646 0.00      
4 Ag 1537 1463 0.00      
5 Ag 1444 1375 0.00      
6 Ag 1158 1103 0.00      
7 Ag 1110 1057 0.00      
8 Ag 901 858 0.00      
9 Ag 470 448 0.00      
10 Au 3556 3386 1.08      
11 Au 3107 2959 72.37      
12 Au 1432 1363 2.25      
13 Au 1098 1046 0.53      
14 Au 770 734 0.19      
15 Au 285 271 128.27      
16 Au 153 146 0.16      
17 Bg 3557 3387 0.00      
18 Bg 3082 2935 0.00      
19 Bg 1405 1338 0.00      
20 Bg 1340 1276 0.00      
21 Bg 969 922 0.00      
22 Bg 318 303 0.00      
23 Bu 3468 3303 2.66      
24 Bu 3054 2908 80.63      
25 Bu 1726 1644 51.60      
26 Bu 1553 1479 0.85      
27 Bu 1361 1296 27.58      
28 Bu 1120 1066 5.75      
29 Bu 949 903 410.84      
30 Bu 281 268 20.96      

Unscaled Zero Point Vibrational Energy (zpe) 24723.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 23544.4 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 QCISD/6-31G*
ABC
0.87173 0.12445 0.11773

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 1.887 0.000
N4 0.399 -1.887 0.000
H5 1.016 -1.889 0.814
H6 1.016 -1.889 -0.814
H7 -1.016 1.889 0.814
H8 -1.016 1.889 -0.814
H9 -1.058 -0.680 -0.881
H10 -1.058 -0.680 0.881
H11 1.058 0.680 -0.881
H12 1.058 0.680 0.881

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.53491.46742.54202.74172.74172.04632.04632.16392.16391.10021.1002
C21.53492.54201.46742.04632.04632.74172.74171.10021.10022.16392.1639
N31.46742.54203.85664.11334.11331.02161.02162.79222.79222.08692.0869
N42.54201.46743.85661.02161.02164.11334.11332.08692.08692.79222.7922
H52.74172.04634.11331.02161.62904.28934.58832.93872.40133.07812.5700
H62.74172.04634.11331.02161.62904.58834.28932.40132.93872.57003.0781
H72.04632.74171.02164.11334.28934.58831.62903.07812.57002.93872.4013
H82.04632.74171.02164.11334.58834.28931.62902.57003.07812.40132.9387
H92.16391.10022.79222.08692.93872.40133.07812.57001.76182.51513.0707
H102.16391.10022.79222.08692.40132.93872.57003.07811.76183.07072.5151
H111.10022.16392.08692.79223.07812.57002.93872.40132.51513.07071.7618
H121.10022.16392.08692.79222.57003.07812.40132.93873.07072.51511.7618

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.684 C1 C2 H9 109.298
C1 C2 H10 109.298 C1 N3 H7 109.289
C1 N3 H8 109.289 C2 C1 N3 115.684
C2 C1 H11 109.298 C2 C1 H12 109.298
C2 N4 H5 109.289 C2 N4 H6 109.289
N3 C1 H11 107.883 N3 C1 H12 107.883
N4 C2 H9 107.883 N4 C2 H10 107.883
H5 N4 H6 105.745 H7 N3 H8 105.745
H9 C2 H10 106.393 H11 C1 H12 106.393
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability