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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD=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=FULL/cc-pVDZ
 hartrees
Energy at 0K-153.421112
Energy at 298.15K 
HF Energy-152.927491
Nuclear repulsion energy69.279530
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/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' 3194 3194 8.99      
2 A' 3069 3069 4.02      
3 A' 2946 2946 128.27      
4 A' 1850 1850 138.03      
5 A' 1466 1466 15.25      
6 A' 1440 1440 14.20      
7 A' 1388 1388 11.48      
8 A' 1139 1139 21.95      
9 A' 909 909 4.50      
10 A' 507 507 14.01      
11 A" 3149 3149 9.83      
12 A" 1478 1478 8.54      
13 A" 1139 1139 0.26      
14 A" 783 783 0.36      
15 A" 167 167 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 12311.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12311.8 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 CCSD=FULL/cc-pVDZ
ABC
1.87380 0.33500 0.30033

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.937 -0.722 0.000
O3 1.209 0.387 0.000
H4 -0.508 1.465 0.000
H5 -0.361 -1.660 0.000
H6 -1.591 -0.679 0.889
H7 -1.591 -0.679 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51321.21181.12092.15632.15242.1524
C21.51322.41612.22911.10051.10471.1047
O31.21182.41612.02752.58003.12543.1254
H41.12092.22912.02753.12862.56152.5615
H52.15631.10052.58003.12861.80711.8071
H62.15241.10473.12542.56151.80711.7788
H72.15241.10473.12542.56151.80711.7788

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.175 C1 C2 H6 109.620
C1 C2 H7 109.620 C2 C1 O3 124.534
C2 C1 H4 114.794 O3 C1 H4 120.673
H5 C2 H6 110.065 H5 C2 H7 110.065
H6 C2 H7 107.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability