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(T)/6-31+G**

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(T)/6-31+G**
 hartrees
Energy at 0K-228.432689
Energy at 298.15K-228.437464
HF Energy-227.767595
Nuclear repulsion energy118.564779
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(T)/6-31+G**
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' 3646 3498        
2 A' 3017 2895        
3 A' 2994 2873        
4 A' 1769 1698        
5 A' 1519 1458        
6 A' 1464 1405        
7 A' 1411 1354        
8 A' 1307 1254        
9 A' 1136 1090        
10 A' 887 851        
11 A' 755 725        
12 A' 300 287        
13 A" 3044 2921        
14 A" 1248 1198        
15 A" 1118 1073        
16 A" 742 712        
17 A" 360 345        
18 A" 136 130        

Unscaled Zero Point Vibrational Energy (zpe) 13426.2 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 12883.8 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 CCSD(T)/6-31+G**
ABC
0.60393 0.21572 0.16387

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.942 0.000
C2 0.936 -0.247 0.000
O3 -1.358 0.547 0.000
O4 0.519 -1.400 0.000
H5 -1.367 -0.433 0.000
H6 0.220 1.558 0.889
H7 0.220 1.558 -0.889
H8 2.023 -0.032 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.51261.41432.39871.93931.10411.10412.2452
C21.51262.42691.22612.31062.13552.13551.1085
O31.41432.42692.70440.98002.07482.07483.4301
O42.39871.22612.70442.12003.10353.10352.0330
H51.93932.31060.98002.12002.69782.69783.4142
H61.10412.13552.07483.10352.69781.77812.5630
H71.10412.13552.07483.10352.69781.77812.5630
H82.24521.10853.43012.03303.41422.56302.5630

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 121.943 C1 C2 H8 117.033
C1 O3 H5 106.781 C2 C1 O3 111.985
C2 C1 H6 108.382 C2 C1 H7 108.382
O3 C1 H6 110.342 O3 C1 H7 110.342
O4 C2 H8 121.024 H6 C1 H7 107.261
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability