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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD(T)=FULL/TZVP

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/TZVP
 hartrees
Energy at 0K-153.552585
Energy at 298.15K 
HF Energy-152.969869
Nuclear repulsion energy69.524658
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/TZVP
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 3166 3026        
2 A 3116 2979        
3 A 3045 2911        
4 A 2935 2805        
5 A 1783 1704        
6 A 1484 1419        
7 A 1482 1417        
8 A 1454 1390        
9 A 1405 1344        
10 A 1144 1094        
11 A 1139 1089        
12 A 897 858        
13 A 783 749        
14 A 514 491        
15 A 154 147        

Unscaled Zero Point Vibrational Energy (zpe) 12249.7 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 11710.7 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/TZVP
ABC
1.89280 0.33699 0.30213

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.232 0.402 0.000
C2 -1.171 -0.149 0.000
O3 1.236 -0.278 -0.000
H4 0.306 1.508 0.000
H5 -1.150 -1.238 0.000
H6 -1.705 0.218 0.882
H7 -1.705 0.218 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50701.21351.10772.14522.13572.1357
C21.50702.41082.21931.08961.09421.0942
O31.21352.41082.01352.57273.11033.1103
H41.10772.21932.01353.10822.54642.5465
H52.14521.08962.57273.10821.79031.7903
H62.13571.09423.11032.54641.79031.7638
H72.13571.09423.11032.54651.79031.7638

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.381 C1 C2 H6 109.358
C1 C2 H7 109.357 C2 C1 O3 124.435
C2 C1 H4 115.309 O3 C1 H4 120.256
H5 C2 H6 110.139 H5 C2 H7 110.139
H6 C2 H7 107.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability