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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-188.649629
Energy at 298.15K-188.659831
HF Energy-188.211696
Nuclear repulsion energy129.612171
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 CCD/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 3387 3239 0.00      
2 Ag 3030 2898 0.00      
3 Ag 1754 1678 0.00      
4 Ag 1554 1487 0.00      
5 Ag 1420 1358 0.00      
6 Ag 1115 1067 0.00      
7 Ag 1006 963 0.00      
8 Ag 792 758 0.00      
9 Ag 457 437 0.00      
10 Au 3479 3328 6.45      
11 Au 3089 2955 57.86      
12 Au 1425 1363 3.83      
13 Au 1108 1059 0.37      
14 Au 761 728 0.42      
15 Au 288 275 139.35      
16 Au 149 143 0.43      
17 Bg 3479 3328 0.00      
18 Bg 3062 2929 0.00      
19 Bg 1402 1341 0.00      
20 Bg 1344 1286 0.00      
21 Bg 959 918 0.00      
22 Bg 314 300 0.00      
23 Bu 3386 3239 7.08      
24 Bu 3037 2905 63.84      
25 Bu 1754 1678 36.06      
26 Bu 1571 1503 1.77      
27 Bu 1358 1299 7.23      
28 Bu 1071 1024 21.69      
29 Bu 819 783 464.83      
30 Bu 265 254 20.63      

Unscaled Zero Point Vibrational Energy (zpe) 24317.8 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 23260.0 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 CCD/3-21G*
ABC
0.85179 0.12084 0.11442

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.411 0.662 0.000
C2 -0.411 -0.662 0.000
N3 -0.411 1.910 0.000
N4 0.411 -1.910 0.000
H5 1.007 -1.951 0.834
H6 1.007 -1.951 -0.834
H7 -1.007 1.951 0.834
H8 -1.007 1.951 -0.834
H9 -1.061 -0.682 -0.888
H10 -1.061 -0.682 0.888
H11 1.061 0.682 -0.888
H12 1.061 0.682 0.888

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.55781.49512.57182.80612.80612.09032.09032.18202.18201.10021.1002
C21.55782.57181.49512.09032.09032.80612.80611.10021.10022.18202.1820
N31.49512.57183.90794.19694.19691.02591.02592.81632.81632.11252.1125
N42.57181.49513.90791.02591.02594.19694.19692.11252.11252.81632.8163
H52.80612.09034.19691.02591.66784.39074.69682.97492.42683.14622.6340
H62.80612.09034.19691.02591.66784.69684.39072.42682.97492.63403.1462
H72.09032.80611.02594.19694.39074.69681.66783.14622.63402.97492.4268
H82.09032.80611.02594.19694.69684.39071.66782.63403.14622.42682.9749
H92.18201.10022.81632.11252.97492.42683.14622.63401.77522.52293.0849
H102.18201.10022.81632.11252.42682.97492.63403.14621.77523.08492.5229
H111.10022.18202.11252.81633.14622.63402.97492.42682.52293.08491.7752
H121.10022.18202.11252.81632.63403.14622.42682.97493.08492.52291.7752

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 114.771 C1 C2 H9 109.136
C1 C2 H10 109.136 C1 N3 H7 110.641
C1 N3 H8 110.641 C2 C1 N3 114.771
C2 C1 H11 109.136 C2 C1 H12 109.136
C2 N4 H5 110.641 C2 N4 H6 110.641
N3 C1 H11 108.004 N3 C1 H12 108.004
N4 C2 H9 108.004 N4 C2 H10 108.004
H5 N4 H6 108.751 H7 N3 H8 108.751
H9 C2 H10 107.555 H11 C1 H12 107.555
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability