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All results from a given calculation for CH3CH2NH2 (Ethylamine)

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 CS trans 1A'
1 2 no C1 gauche 1A

Conformer 1 (CS trans)

Jump to S1C2
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-133.795680
Energy at 298.15K-133.803889
HF Energy-133.502596
Nuclear repulsion energy81.763228
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 A' 3419 3253 2.56      
2 A' 3154 3000 33.92      
3 A' 3100 2949 27.24      
4 A' 3076 2927 14.89      
5 A' 1761 1675 16.93      
6 A' 1603 1525 2.57      
7 A' 1586 1509 0.52      
8 A' 1485 1413 4.10      
9 A' 1430 1360 6.50      
10 A' 1186 1128 13.90      
11 A' 1038 987 1.18      
12 A' 911 866 75.19      
13 A' 799 760 169.99      
14 A' 398 379 7.20      
15 A" 3520 3349 1.70      
16 A" 3160 3007 54.34      
17 A" 3135 2982 0.08      
18 A" 1601 1523 6.93      
19 A" 1434 1364 0.20      
20 A" 1336 1271 0.01      
21 A" 1047 996 1.71      
22 A" 802 763 1.13      
23 A" 321 306 55.33      
24 A" 268 255 10.23      

Unscaled Zero Point Vibrational Energy (zpe) 20784.8 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 19772.5 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 MP2/3-21G*
ABC
1.03704 0.28431 0.25379

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.322 -0.110 0.000
C2 0.000 0.590 0.000
C3 1.236 -0.349 0.000
H4 2.169 0.225 0.000
H5 1.222 -0.990 0.889
H6 1.222 -0.990 -0.889
H7 0.028 1.237 -0.883
H8 0.028 1.237 0.883
H9 -1.416 -0.699 0.833
H10 -1.416 -0.699 -0.833

Atom - Atom Distances (Å)
  N1 C2 C3 H4 H5 H6 H7 H8 H9 H10
N11.49592.56913.50682.83452.83452.10172.10171.02411.0241
C21.49591.55292.19952.18652.18651.09471.09472.08822.0882
C32.56911.55291.09571.09601.09602.18072.18072.80172.8017
H43.50682.19951.09571.77911.77912.52692.52693.79473.7947
H52.83452.18651.09601.77911.77843.08622.52682.65433.1634
H62.83452.18651.09601.77911.77842.52683.08623.16342.6543
H72.10171.09472.18072.52693.08622.52681.76552.96262.4160
H82.10171.09472.18072.52692.52683.08621.76552.41602.9626
H91.02412.08822.80173.79472.65433.16342.96262.41601.6653
H101.02412.08822.80173.79473.16342.65432.41602.96261.6653

picture of Ethylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 114.837 N1 C2 H7 107.429
N1 C2 H8 107.429 C2 N1 H9 110.518
C2 N1 H10 110.518 C2 C3 H4 111.115
C2 C3 H5 110.073 C2 C3 H6 110.073
C3 C2 H7 109.693 C3 C2 H8 109.693
H4 C3 H5 108.531 H4 C3 H6 108.531
H5 C3 H6 108.452 H7 C2 H8 107.486
H9 N1 H10 108.782
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1 gauche)

Jump to S1C1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-133.794812
Energy at 298.15K 
Nuclear repulsion energy 
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*
Rotational Constants (cm-1) from geometry optimized at MP2/3-21G*
ABC
1.03704 0.28431 0.25379

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

Point Group is Cs

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability