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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-188.610143
Energy at 298.15K-188.620367
HF Energy-188.212455
Nuclear repulsion energy129.816291
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 MP2/3-21G*
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 3426 3260 0.00      
2 Ag 3076 2927 0.00      
3 Ag 1759 1674 0.00      
4 Ag 1572 1496 0.00      
5 Ag 1428 1359 0.00      
6 Ag 1117 1062 0.00      
7 Ag 1009 960 0.00      
8 Ag 782 744 0.00      
9 Ag 459 437 0.00      
10 Au 3528 3356 1.91      
11 Au 3143 2990 59.54      
12 Au 1434 1364 3.62      
13 Au 1113 1059 0.24      
14 Au 769 732 0.56      
15 Au 292 278 139.43      
16 Au 154 146 0.47      
17 Bg 3528 3356 0.00      
18 Bg 3116 2965 0.00      
19 Bg 1413 1344 0.00      
20 Bg 1355 1289 0.00      
21 Bg 966 919 0.00      
22 Bg 320 304 0.00      
23 Bu 3426 3259 3.00      
24 Bu 3084 2934 64.93      
25 Bu 1759 1673 36.81      
26 Bu 1590 1512 1.46      
27 Bu 1369 1302 7.73      
28 Bu 1074 1022 17.60      
29 Bu 804 765 491.00      
30 Bu 264 251 20.49      

Unscaled Zero Point Vibrational Energy (zpe) 24565.6 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 23369.3 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 MP2/3-21G*
ABC
0.85712 0.12102 0.11465

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

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 1.002 -1.955 0.834
H6 1.002 -1.955 -0.834
H7 -1.002 1.955 0.834
H8 -1.002 1.955 -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
C11.55541.49302.56912.80882.80882.08922.08922.17582.17581.09651.0965
C21.55542.56911.49302.08922.08922.80882.80881.09651.09652.17582.1758
N31.49302.56913.90384.19724.19721.02361.02362.81112.81112.10812.1081
N42.56911.49303.90381.02361.02364.19724.19722.10812.10812.81112.8111
H52.80882.08924.19721.02361.66764.39414.69982.96982.42233.14702.6366
H62.80882.08924.19721.02361.66764.69984.39412.42232.96982.63663.1470
H72.08922.80881.02364.19724.39414.69981.66763.14702.63662.96982.4223
H82.08922.80881.02364.19724.69984.39411.66762.63663.14702.42232.9698
H92.17581.09652.81112.10812.96982.42233.14702.63661.77042.51393.0747
H102.17581.09652.81112.10812.42232.96982.63663.14701.77043.07472.5139
H111.09652.17582.10812.81113.14702.63662.96982.42232.51393.07471.7704
H121.09652.17582.10812.81112.63663.14702.42232.96983.07472.51391.7704

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 114.851 C1 C2 H9 109.034
C1 C2 H10 109.034 C1 N3 H7 110.854
C1 N3 H8 110.854 C2 C1 N3 114.851
C2 C1 H11 109.034 C2 C1 H12 109.034
C2 N4 H5 110.854 C2 N4 H6 110.854
N3 C1 H11 108.015 N3 C1 H12 108.015
N4 C2 H9 108.015 N4 C2 H10 108.015
H5 N4 H6 109.095 H7 N3 H8 109.095
H9 C2 H10 107.661 H11 C1 H12 107.661
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability