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 CHOCH2OH (hydroxy acetaldehyde)

using model chemistry: CCSD/6-31G(2df,p)

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 CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-228.565008
Energy at 298.15K-228.569941
Nuclear repulsion energy 
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 CCSD/6-31G(2df,p)
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' 3818 3610 63.05      
2 A' 3048 2882 53.18      
3 A' 3020 2856 41.77      
4 A' 1844 1743 103.62      
5 A' 1529 1446 11.15      
6 A' 1492 1411 68.20      
7 A' 1427 1349 17.78      
8 A' 1341 1268 45.94      
9 A' 1171 1107 69.53      
10 A' 893 844 39.69      
11 A' 775 732 12.63      
12 A' 309 292 21.17      
13 A" 3073 2906 23.20      
14 A" 1277 1208 1.57      
15 A" 1136 1074 0.37      
16 A" 751 710 0.13      
17 A" 394 373 81.38      
18 A" 188 178 6.00      

Unscaled Zero Point Vibrational Energy (zpe) 13743.2 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 12994.2 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 CCSD/6-31G(2df,p)
ABC
0.61556 0.22061 0.16746

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 -0.932 0.000
C2 -0.928 0.275 0.000
O3 1.349 -0.580 0.000
O4 -0.510 1.403 0.000
H5 1.345 0.379 0.000
H6 -0.241 -1.539 0.882
H7 -0.241 -1.539 -0.882
H8 -2.013 0.058 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.52271.39452.39071.87891.09761.09762.2433
C21.52272.43251.20292.27532.13122.13121.1066
O31.39452.43252.71900.95982.05562.05563.4223
O42.39071.20292.71902.11923.08363.08362.0167
H51.87892.27530.95982.11922.64072.64073.3733
H61.09762.13122.05563.08362.64071.76502.5438
H71.09762.13122.05563.08362.64071.76502.5438
H82.24331.10663.42232.01673.37332.54382.5438

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 122.159 C1 C2 H8 116.229
C1 O3 H5 104.367 C2 C1 O3 112.917
C2 C1 H6 107.746 C2 C1 H7 107.746
O3 C1 H6 110.582 O3 C1 H7 110.582
O4 C2 H8 121.611 H6 C1 H7 107.034
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability