return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH2CHNH2 (aminoethene)

using model chemistry: HF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/6-31+G**
 hartrees
Energy at 0K-133.082257
Energy at 298.15K-133.087824
HF Energy-133.082257
Nuclear repulsion energy71.998078
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 HF/6-31+G**
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 3914 3539 25.21      
2 A 3802 3438 20.98      
3 A 3408 3082 18.38      
4 A 3343 3022 10.33      
5 A 3312 2995 9.07      
6 A 1856 1678 216.92      
7 A 1796 1624 31.28      
8 A 1577 1426 2.38      
9 A 1442 1304 7.57      
10 A 1385 1252 62.85      
11 A 1152 1041 17.74      
12 A 1113 1006 28.40      
13 A 1040 940 9.00      
14 A 959 867 117.17      
15 A 778 704 28.52      
16 A 632 572 310.17      
17 A 499 451 4.48      
18 A 342 310 61.31      

Unscaled Zero Point Vibrational Energy (zpe) 16175.1 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 14625.6 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 HF/6-31+G**
ABC
1.93107 0.33757 0.28955

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.242 -0.197 0.016
C2 0.072 0.427 -0.005
N3 -1.181 -0.167 -0.082
H4 1.318 -1.272 0.018
H5 2.155 0.366 0.013
H6 0.038 1.503 -0.013
H7 -1.209 -1.140 0.129
H8 -1.919 0.336 0.357

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6 H7 H8
C11.32602.42461.07701.07332.08322.62863.2239
C21.32601.38822.10642.08421.07702.02842.0259
N32.42461.38822.73383.37952.06870.99640.9953
H41.07702.10642.73381.83943.05552.53303.6303
H51.07332.08423.37951.83942.40273.68824.0892
H62.08321.07702.06873.05552.40272.92662.3094
H72.62862.02840.99642.53303.68822.92661.6538
H83.22392.02590.99533.63034.08922.30941.6538

picture of aminoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 126.568 C1 C2 H6 119.853
C2 C1 H4 122.126 C2 C1 H5 120.247
C2 N3 H7 115.582 C2 N3 H8 115.428
N3 C2 H6 113.506 H4 C1 H5 117.617
H7 N3 H8 112.267
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.388      
2 C 0.008      
3 N -0.633      
4 H 0.127      
5 H 0.142      
6 H 0.146      
7 H 0.300      
8 H 0.299      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.118 0.073 1.088 1.561
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.922 0.102 -2.309
y 0.102 -16.334 -0.135
z -2.309 -0.135 -23.291
Traceless
 xyz
x 1.891 0.102 -2.309
y 0.102 4.272 -0.135
z -2.309 -0.135 -6.163
Polar
3z2-r2-12.326
x2-y2-1.588
xy0.102
xz-2.309
yz-0.135


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.636 -0.790 0.058
y -0.790 4.349 -0.009
z 0.058 -0.009 3.593


<r2> (average value of r2) Å2
<r2> 49.688
(<r2>)1/2 7.049