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All results from a given calculation for CHOCH2OH (hydroxy acetaldehyde)

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 H in 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-45.253831
Energy at 298.15K-45.258618
HF Energy-44.670100
Nuclear repulsion energy66.249115
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' 3710 3523 59.26      
2 A' 3073 2918 73.58      
3 A' 3043 2889 66.17      
4 A' 1754 1665 94.75      
5 A' 1514 1437 10.28      
6 A' 1471 1397 72.14      
7 A' 1387 1317 10.80      
8 A' 1309 1243 52.36      
9 A' 1138 1080 71.08      
10 A' 887 842 43.81      
11 A' 752 714 10.39      
12 A' 290 276 20.94      
13 A" 3121 2963 30.77      
14 A" 1250 1187 5.09      
15 A" 1111 1055 1.38      
16 A" 733 696 0.10      
17 A" 370 351 111.86      
18 A" 158 150 16.87      

Unscaled Zero Point Vibrational Energy (zpe) 13535.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 12850.3 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/CEP-31G*
ABC
0.59481 0.21167 0.16094

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 0.953 0.000
C2 0.944 -0.253 0.000
O3 -1.367 0.558 0.000
O4 0.517 -1.416 0.000
H5 -1.360 -0.424 0.000
H6 0.228 1.566 0.896
H7 0.228 1.566 -0.896
H8 2.039 -0.040 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.53201.42312.42491.93571.10901.10902.2677
C21.53202.44991.23902.31102.15022.15021.1146
O31.42312.44992.72900.98232.08882.08883.4579
O42.42491.23902.72902.12313.12673.12672.0514
H51.93572.31100.98232.12312.69912.69913.4204
H61.10902.15022.08883.12672.69911.79182.5805
H71.10902.15022.08883.12672.69911.79182.5805
H82.26771.11463.45792.05143.42042.58052.5805

picture of hydroxy acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O4 121.753 C1 C2 H8 117.050
C1 O3 H5 105.706 C2 C1 O3 111.947
C2 C1 H6 107.937 C2 C1 H7 107.937
O3 C1 H6 110.551 O3 C1 H7 110.551
O4 C2 H8 121.197 H6 C1 H7 107.767
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability