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All results from a given calculation for CH3CHO (Acetaldehyde)

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

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-pVDZ
 hartrees
Energy at 0K-153.429251
Energy at 298.15K-153.433169
HF Energy-152.937529
Nuclear repulsion energy69.165976
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-pVDZ
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' 3202 3202 6.90 39.46 0.73 0.84
2 A' 3065 3065 2.69 188.89 0.01 0.01
3 A' 2962 2962 108.47 161.95 0.27 0.43
4 A' 1748 1748 132.63 10.86 0.43 0.60
5 A' 1452 1452 21.39 10.25 0.53 0.69
6 A' 1414 1414 8.94 5.47 0.23 0.38
7 A' 1366 1366 18.85 1.42 0.69 0.82
8 A' 1134 1134 20.26 3.66 0.16 0.28
9 A' 901 901 5.29 5.79 0.28 0.44
10 A' 502 502 12.63 1.58 0.28 0.43
11 A" 3152 3152 5.83 55.66 0.75 0.86
12 A" 1464 1464 9.45 3.83 0.75 0.86
13 A" 1121 1121 0.02 0.98 0.75 0.86
14 A" 768 768 1.31 2.96 0.75 0.86
15 A" 160 160 1.39 0.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12204.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12204.8 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=FULL/daug-cc-pVDZ
ABC
1.87307 0.33435 0.29964

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.948 -0.707 0.000
O3 1.221 0.367 0.000
H4 -0.478 1.471 0.000
H5 -0.396 -1.654 0.000
H6 -1.601 -0.644 0.885
H7 -1.601 -0.644 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50621.22461.11532.15412.13802.1380
C21.50622.42032.22791.09641.10151.1015
O31.22462.42032.02632.58823.12493.1249
H41.11532.22792.02633.12602.55242.5524
H52.15411.09642.58823.12601.80421.8042
H62.13801.10153.12492.55241.80421.7706
H72.13801.10153.12492.55241.80421.7706

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.741 C1 C2 H6 109.163
C1 C2 H7 109.163 C2 C1 O3 124.502
C2 C1 H4 115.583 O3 C1 H4 119.914
H5 C2 H6 110.351 H5 C2 H7 110.351
H6 C2 H7 106.984
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability