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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD=FULL/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-153.625165
Energy at 298.15K 
HF Energy-152.981442
Nuclear repulsion energy69.951030
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/Def2TZVPP
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' 3178 3178 8.03      
2 A' 3061 3061 3.04      
3 A' 2959 2959 98.05      
4 A' 1840 1840 151.20      
5 A' 1486 1486 19.09      
6 A' 1454 1454 10.93      
7 A' 1409 1409 15.43      
8 A' 1154 1154 22.62      
9 A' 911 911 6.12      
10 A' 513 513 14.34      
11 A" 3126 3126 7.68      
12 A" 1499 1499 9.00      
13 A" 1159 1159 0.03      
14 A" 793 793 0.78      
15 A" 161 161 1.47      

Unscaled Zero Point Vibrational Energy (zpe) 12352.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12352.3 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/Def2TZVPP
ABC
1.91445 0.34106 0.30575

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.932 -0.713 0.000
O3 1.200 0.378 0.000
H4 -0.485 1.452 0.000
H5 -0.370 -1.641 0.000
H6 -1.577 -0.665 0.876
H7 -1.577 -0.665 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50041.20321.10212.13592.12732.1273
C21.50042.39552.21111.08451.08931.0893
O31.20322.39551.99832.55833.09343.0934
H41.10212.21111.99833.09532.53792.5379
H52.13591.08452.55833.09531.78271.7827
H62.12731.08933.09342.53791.78271.7529
H72.12731.08933.09342.53791.78271.7529

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.406 C1 C2 H6 109.435
C1 C2 H7 109.435 C2 C1 O3 124.394
C2 C1 H4 115.487 O3 C1 H4 120.119
H5 C2 H6 110.182 H5 C2 H7 110.182
H6 C2 H7 107.138
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability