return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3C(OH)=NH (Ethaninidic acid)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-39.826731
Energy at 298.15K-39.833052
HF Energy-39.255976
Nuclear repulsion energy67.638147
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/CEP-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 A' 3725 3536 54.41      
2 A' 3551 3371 3.26      
3 A' 3223 3060 17.15      
4 A' 3108 2951 10.18      
5 A' 1736 1648 201.95      
6 A' 1511 1434 21.69      
7 A' 1473 1398 71.87      
8 A' 1405 1334 5.71      
9 A' 1285 1220 90.12      
10 A' 1124 1067 192.01      
11 A' 1034 981 35.29      
12 A' 880 836 0.66      
13 A' 539 511 44.67      
14 A' 415 394 2.07      
15 A" 3206 3043 9.89      
16 A" 1501 1425 9.76      
17 A" 1088 1033 5.92      
18 A" 851 808 27.12      
19 A" 621 590 167.18      
20 A" 521 495 13.32      
21 A" 131 125 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 16461.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 15628.5 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/CEP-31G*
ABC
0.35303 0.30063 0.16755

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.133 0.000
C2 0.972 -1.038 0.000
N3 0.224 1.412 0.000
O4 -1.299 -0.316 0.000
H5 2.013 -0.679 0.000
H6 0.794 -1.661 0.893
H7 0.794 -1.661 -0.893
H8 1.237 1.578 0.000
H9 -1.849 0.498 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52241.29831.37422.17102.15542.15541.90261.8851
C21.52242.56212.38301.10141.10301.10302.63013.2129
N31.29832.56212.30332.75223.25053.25051.02702.2659
O41.37422.38302.30333.33192.64252.64253.16560.9831
H52.17101.10142.75223.33191.80261.80262.38714.0382
H62.15541.10303.25052.64251.80261.78513.38953.5277
H72.15541.10303.25052.64251.80261.78513.38953.5277
H81.90262.63011.02703.16562.38713.38953.38953.2704
H91.88513.21292.26590.98314.03823.52773.52773.2704

picture of Ethaninidic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.652 C1 C2 H6 109.332
C1 C2 H7 109.332 C1 N3 H8 109.258
C1 O4 H9 104.984 C2 C1 N3 130.377
C2 C1 O4 110.603 N3 C1 O4 119.020
H5 C2 H6 109.721 H5 C2 H7 109.721
H6 C2 H7 108.038
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability