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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-44.939543
Energy at 298.15K-44.944114
HF Energy-44.558647
Nuclear repulsion energy64.662424
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' 3629 3507 27.11      
2 A' 3059 2956 109.96      
3 A' 3040 2938 39.84      
4 A' 1578 1525 35.24      
5 A' 1519 1468 14.48      
6 A' 1422 1374 47.60      
7 A' 1374 1328 3.70      
8 A' 1271 1228 68.77      
9 A' 1047 1012 41.16      
10 A' 854 825 51.57      
11 A' 714 690 10.59      
12 A' 275 266 20.51      
13 A" 3115 3010 38.70      
14 A" 1206 1166 8.26      
15 A" 1101 1063 1.28      
16 A" 742 717 0.90      
17 A" 321 310 143.56      
18 A" 95 92 43.74      

Unscaled Zero Point Vibrational Energy (zpe) 13181.3 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 12737.1 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
0.56171 0.20183 0.15291

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 0.974 0.000
C2 0.977 -0.234 0.000
O3 -1.414 0.545 0.000
O4 0.558 -1.443 0.000
H5 -1.460 -0.446 0.000
H6 0.187 1.594 0.903
H7 0.187 1.594 -0.903
H8 2.069 -0.008 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.55371.47782.48062.03631.11131.11132.2907
C21.55372.51521.27992.44622.18682.18681.1151
O31.47782.51522.80040.99192.11642.11643.5272
O42.48061.27992.80042.25063.19033.19032.0841
H52.03632.44620.99192.25062.77272.77273.5561
H61.11132.18682.11643.19032.77271.80612.6320
H71.11132.18682.11643.19032.77271.80612.6320
H82.29071.11513.52722.08413.55612.63202.6320

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 121.893 C1 C2 H8 117.309
C1 O3 H5 109.501 C2 C1 O3 112.107
C2 C1 H6 109.149 C2 C1 H7 109.149
O3 C1 H6 108.837 O3 C1 H7 108.837
O4 C2 H8 120.798 H6 C1 H7 108.703
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability