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-121G

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-121G
 hartrees
Energy at 0K-39.575157
Energy at 298.15K-39.581390
HF Energy-39.162275
Nuclear repulsion energy66.634297
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-121G
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' 3583 3497 30.94      
2 A' 3406 3324 10.81      
3 A' 3111 3036 20.10      
4 A' 2993 2922 12.87      
5 A' 1628 1589 116.49      
6 A' 1518 1481 37.42      
7 A' 1461 1426 25.99      
8 A' 1391 1358 18.30      
9 A' 1219 1190 77.62      
10 A' 1080 1054 101.64      
11 A' 1003 979 170.24      
12 A' 826 806 6.12      
13 A' 510 498 46.14      
14 A' 404 394 4.31      
15 A" 3103 3029 13.27      
16 A" 1495 1459 10.64      
17 A" 1091 1065 2.39      
18 A" 846 826 47.08      
19 A" 596 581 202.42      
20 A" 487 476 5.99      
21 A" 114 111 1.74      

Unscaled Zero Point Vibrational Energy (zpe) 15931.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 15549.0 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 MP2/CEP-121G
ABC
0.33954 0.29293 0.16210

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.133 0.000
C2 1.121 -0.908 0.000
N3 0.034 1.447 0.000
O4 -1.270 -0.500 0.000
H5 2.102 -0.410 0.000
H6 1.033 -1.547 0.891
H7 1.033 -1.547 -0.891
H8 0.996 1.824 0.000
H9 -1.969 0.198 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 O4 H5 H6 H7 H8 H9
C11.52991.31411.41892.17092.16472.16471.96211.9703
C21.52992.59362.42531.10001.10061.10062.73443.2822
N31.31412.59362.34312.77923.28003.28001.03322.3607
O41.41892.42532.34313.37282.68212.68213.24550.9881
H52.17091.10002.77923.37281.79761.79762.49244.1162
H62.16471.10063.28002.68211.79761.78263.48723.5852
H72.16471.10063.28002.68211.79761.78263.48723.5852
H81.96212.73441.03323.24552.49243.48723.48723.3817
H91.97033.28222.36070.98814.11623.58523.58523.3817

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 110.198 C1 C2 H6 109.679
C1 C2 H7 109.679 C1 N3 H8 112.871
C1 O4 H9 108.560 C2 C1 N3 131.402
C2 C1 O4 110.613 N3 C1 O4 117.985
H5 C2 H6 109.545 H5 C2 H7 109.545
H6 C2 H7 108.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability