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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CID/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 CID/Def2TZVPP
 hartrees
Energy at 0K-153.497671
Energy at 298.15K 
HF Energy-152.982102
Nuclear repulsion energy70.310612
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 CID/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' 3256 3256 8.15      
2 A' 3137 3137 2.73      
3 A' 3041 3041 95.82      
4 A' 1920 1920 184.84      
5 A' 1523 1523 19.82      
6 A' 1491 1491 12.76      
7 A' 1447 1447 15.47      
8 A' 1181 1181 24.34      
9 A' 933 933 5.59      
10 A' 526 526 16.11      
11 A" 3205 3205 7.59      
12 A" 1534 1534 9.33      
13 A" 1197 1197 0.15      
14 A" 813 813 0.68      
15 A" 163 163 1.76      

Unscaled Zero Point Vibrational Energy (zpe) 12683.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12683.8 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 CID/Def2TZVPP
ABC
1.93533 0.34414 0.30862

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.924 -0.717 0.000
O3 1.191 0.384 0.000
H4 -0.490 1.443 0.000
H5 -0.362 -1.639 0.000
H6 -1.567 -0.670 0.873
H7 -1.567 -0.670 -0.873

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49621.19341.09812.13052.12012.1201
C21.49622.38422.20311.08031.08511.0851
O31.19342.38421.98632.55073.07883.0788
H41.09812.20311.98633.08512.52782.5278
H52.13051.08032.55073.08511.77551.7755
H62.12011.08513.07882.52781.77551.7461
H72.12011.08513.07882.52781.77551.7461

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.520 C1 C2 H6 109.409
C1 C2 H7 109.409 C2 C1 O3 124.482
C2 C1 H4 115.395 O3 C1 H4 120.124
H5 C2 H6 110.150 H5 C2 H7 110.150
H6 C2 H7 107.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability