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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD=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 CCSD=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-153.625777
Energy at 298.15K 
HF Energy-152.977557
Nuclear repulsion energy70.047301
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=FULL/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/aug-cc-pVTZ
ABC
1.92173 0.34210 0.30679

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.231 0.398 0.000
C2 -1.162 -0.148 0.000
O3 1.227 -0.276 0.000
H4 0.307 1.495 0.000
H5 -1.147 -1.232 0.000
H6 -1.694 0.220 0.877
H7 -1.694 0.220 -0.877

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49531.20241.10002.13462.12212.1221
C21.49532.39162.20361.08501.08981.0898
O31.20242.39161.99552.55943.08913.0891
H41.10002.20361.99553.09122.52922.5292
H52.13461.08502.55943.09121.78291.7829
H62.12211.08983.08912.52921.78291.7542
H72.12211.08983.08912.52921.78291.7542

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.636 C1 C2 H6 109.346
C1 C2 H7 109.346 C2 C1 O3 124.529
C2 C1 H4 115.377 O3 C1 H4 120.094
H5 C2 H6 110.129 H5 C2 H7 110.129
H6 C2 H7 107.184
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability