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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2=FULL/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-153.608652
Energy at 298.15K-153.612583
HF Energy-152.977090
Nuclear repulsion energy69.915515
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=FULL/daug-cc-pVTZ
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' 3199 3199 4.49 37.73 0.71 0.83
2 A' 3084 3084 1.66 181.17 0.01 0.01
3 A' 2950 2950 101.90 156.09 0.26 0.42
4 A' 1783 1783 136.08 10.91 0.41 0.58
5 A' 1488 1488 23.10 9.03 0.53 0.70
6 A' 1431 1431 9.94 5.30 0.24 0.38
7 A' 1399 1399 21.75 1.47 0.74 0.85
8 A' 1150 1150 21.42 2.87 0.16 0.27
9 A' 911 911 6.79 5.38 0.29 0.45
10 A' 506 506 12.86 1.48 0.28 0.44
11 A" 3151 3151 3.34 52.68 0.75 0.86
12 A" 1503 1503 10.11 3.51 0.75 0.86
13 A" 1147 1147 0.00 0.89 0.75 0.86
14 A" 784 784 1.48 2.75 0.75 0.86
15 A" 162 162 1.36 0.84 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12323.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12323.2 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 MP2=FULL/daug-cc-pVTZ
ABC
1.91624 0.34126 0.30591

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.459 0.000
C2 -0.938 -0.702 0.000
O3 1.207 0.366 0.000
H4 -0.478 1.453 0.000
H5 -0.389 -1.636 0.000
H6 -1.582 -0.643 0.875
H7 -1.582 -0.643 -0.875

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49221.21051.10292.13102.11722.1172
C21.49222.39582.20341.08361.08861.0886
O31.21052.39582.00472.56053.09233.0923
H41.10292.20342.00473.09052.52542.5254
H52.13101.08362.56053.09051.78261.7826
H62.11721.08863.09232.52541.78261.7507
H72.11721.08863.09232.52541.78261.7507

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.643 C1 C2 H6 109.246
C1 C2 H7 109.246 C2 C1 O3 124.535
C2 C1 H4 115.409 O3 C1 H4 120.055
H5 C2 H6 110.291 H5 C2 H7 110.291
H6 C2 H7 107.045
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability