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 CH3CHO (Acetaldehyde)

using model chemistry: QCISD(T)=FULL/aug-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 QCISD(T)=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-153.652213
Energy at 298.15K 
HF Energy-152.976894
Nuclear repulsion energy69.797682
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 QCISD(T)=FULL/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/aug-cc-pVTZ
ABC
1.90850 0.33985 0.30471

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/aug-cc-pVTZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.229 0.400 -0.000
C2 -1.165 -0.149 -0.000
O3 1.232 -0.276 0.000
H4 0.303 1.501 -0.000
H5 -1.148 -1.236 -0.002
H6 -1.697 0.218 0.880
H7 -1.698 0.221 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49841.20951.10312.13892.12562.1256
C21.49842.40022.20821.08691.09171.0917
O31.20952.40022.00532.56663.09813.0991
H41.10312.20822.00533.09772.53362.5324
H52.13891.08692.56663.09771.78661.7866
H62.12561.09173.09812.53361.78661.7572
H72.12561.09173.09912.53241.78661.7572

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.642 C1 C2 H6 109.295
C1 C2 H7 109.295 C2 C1 O3 124.496
C2 C1 H4 115.329 O3 C1 H4 120.175
H5 C2 H6 110.178 H5 C2 H7 110.178
H6 C2 H7 107.178
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability