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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-153.436246
Energy at 298.15K 
HF Energy-152.926738
Nuclear repulsion energy69.097652
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(T)=FULL/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 3179 3062        
2 A 3131 3016        
3 A 3050 2938        
4 A 2915 2808        
5 A 1805 1738        
6 A 1468 1414        
7 A 1456 1402        
8 A 1424 1371        
9 A 1373 1323        
10 A 1127 1086        
11 A 1122 1081        
12 A 899 866        
13 A 773 744        
14 A 500 482        
15 A 168 161        

Unscaled Zero Point Vibrational Energy (zpe) 12194.8 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 11746.0 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 CCSD(T)=FULL/cc-pVDZ
ABC
1.86268 0.33353 0.29891

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.234 0.404 0.000
C2 -1.176 -0.150 0.000
O3 1.242 -0.279 -0.000
H4 0.300 1.525 0.000
H5 -1.152 -1.252 0.000
H6 -1.719 0.220 0.890
H7 -1.718 0.219 -0.891

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51531.21741.12322.15922.15432.1543
C21.51532.42192.23281.10191.10631.1063
O31.21742.42192.03512.58443.13193.1318
H41.12322.23282.03513.13352.56382.5639
H52.15921.10192.58443.13351.81071.8107
H62.15431.10633.13192.56381.81071.7812
H72.15431.10633.13182.56391.81071.7812

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.176 C1 C2 H6 109.532
C1 C2 H7 109.532 C2 C1 O3 124.460
C2 C1 H4 114.802 O3 C1 H4 120.738
H5 C2 H6 110.164 H5 C2 H7 110.164
H6 C2 H7 107.220
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability