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

using model chemistry: MP2/3-21G

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 MP2/3-21G
 hartrees
Energy at 0K-226.907180
Energy at 298.15K-226.912161
HF Energy-226.479036
Nuclear repulsion energy117.299051
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 MP2/3-21G
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' 3433 3277 24.39      
2 A' 3062 2923 48.19      
3 A' 3041 2903 48.20      
4 A' 1632 1558 9.27      
5 A' 1593 1521 13.64      
6 A' 1489 1421 110.76      
7 A' 1439 1374 8.50      
8 A' 1330 1270 48.08      
9 A' 1049 1001 32.69      
10 A' 839 801 42.86      
11 A' 758 723 7.44      
12 A' 319 305 21.92      
13 A" 3086 2946 29.10      
14 A" 1259 1202 7.99      
15 A" 1150 1098 0.17      
16 A" 803 767 0.09      
17 A" 455 435 105.52      
18 A" 187 178 9.97      

Unscaled Zero Point Vibrational Energy (zpe) 13462.3 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 12849.8 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 MP2/3-21G
ABC
0.56723 0.21829 0.16246

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.973 0.000
C2 0.955 -0.221 0.000
O3 -1.378 0.497 0.000
O4 0.517 -1.396 0.000
H5 -1.294 -0.499 0.000
H6 0.209 1.586 0.888
H7 0.209 1.586 -0.888
H8 2.029 0.008 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.52871.45772.42481.95911.09891.09892.2467
C21.52872.44091.25442.26592.14682.14681.0980
O31.45772.44092.67870.99912.11922.11923.4418
O42.42481.25442.67872.02113.12653.12652.0634
H51.95912.26590.99912.02112.71832.71833.3610
H61.09892.14682.11923.12652.71831.77592.5672
H71.09892.14682.11923.12652.71831.77592.5672
H82.24671.09803.44182.06343.36102.56722.5672

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 120.896 C1 C2 H8 116.638
C1 O3 H5 104.215 C2 C1 O3 109.617
C2 C1 H6 108.467 C2 C1 H7 108.467
O3 C1 H6 111.197 O3 C1 H7 111.197
O4 C2 H8 122.466 H6 C1 H7 107.807
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability