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

using model chemistry: MP2/6-31G*

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 MP2/6-31G*
 hartrees
Energy at 0K-228.370217
Energy at 298.15K-228.375090
HF Energy-227.759028
Nuclear repulsion energy119.157746
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 MP2/6-31G*
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' 3677 3468 66.43      
2 A' 3064 2889 63.38      
3 A' 3044 2871 41.99      
4 A' 1778 1677 70.12      
5 A' 1554 1466 8.25      
6 A' 1492 1407 88.61      
7 A' 1433 1351 11.56      
8 A' 1339 1263 54.59      
9 A' 1158 1092 68.34      
10 A' 903 852 47.16      
11 A' 773 729 10.19      
12 A' 314 296 22.03      
13 A" 3097 2920 25.24      
14 A" 1271 1198 3.77      
15 A" 1142 1077 0.37      
16 A" 757 714 0.10      
17 A" 392 369 98.85      
18 A" 157 149 12.49      

Unscaled Zero Point Vibrational Energy (zpe) 13672.2 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 12892.9 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 MP2/6-31G*
ABC
0.60393 0.21997 0.16624

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 -0.936 0.000
C2 -0.933 0.268 0.000
O3 1.356 -0.578 0.000
O4 -0.515 1.411 0.000
H5 1.362 0.394 0.000
H6 -0.236 -1.547 0.884
H7 -0.236 -1.547 -0.884
H8 -2.021 0.046 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.52351.40292.40341.90401.09971.09972.2470
C21.52352.44081.21762.29852.13542.13541.1098
O31.40292.44082.73100.97232.06262.06263.4343
O42.40341.21762.73102.13443.09973.09972.0325
H51.90402.29850.97232.13442.66472.66473.4003
H61.09972.13542.06263.09972.66471.76792.5504
H71.09972.13542.06263.09972.66471.76792.5504
H82.24701.10983.43432.03253.40032.55042.5504

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 122.126 C1 C2 H8 116.262
C1 O3 H5 105.116 C2 C1 O3 112.975
C2 C1 H6 107.895 C2 C1 H7 107.895
O3 C1 H6 110.428 O3 C1 H7 110.428
O4 C2 H8 121.611 H6 C1 H7 106.992
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability