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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULL/aug-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 B2PLYP=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-153.704462
Energy at 298.15K-153.708382
HF Energy-153.542022
Nuclear repulsion energy69.379191
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 B2PLYP=FULL/aug-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' 3176 3055 8.67 42.84 0.71 0.83
2 A' 3049 2933 2.82 192.14 0.01 0.01
3 A' 2928 2816 115.34 166.44 0.29 0.45
4 A' 1771 1704 168.21 11.48 0.51 0.67
5 A' 1444 1389 22.67 10.32 0.54 0.70
6 A' 1415 1361 9.02 4.23 0.27 0.42
7 A' 1366 1314 21.14 1.95 0.75 0.86
8 A' 1131 1088 21.95 3.20 0.16 0.28
9 A' 897 863 6.52 6.09 0.32 0.48
10 A' 504 485 13.58 1.42 0.32 0.48
11 A" 3120 3000 6.92 59.80 0.75 0.86
12 A" 1456 1400 9.57 4.04 0.75 0.86
13 A" 1124 1081 0.01 1.21 0.75 0.86
14 A" 769 740 1.21 3.11 0.75 0.86
15 A" 161 155 1.38 1.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12155.8 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 11691.4 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 B2PLYP=FULL/aug-cc-pVDZ
ABC
1.88412 0.33623 0.30136

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.941 -0.711 0.000
O3 1.214 0.373 0.000
H4 -0.485 1.467 0.000
H5 -0.386 -1.655 0.000
H6 -1.595 -0.653 0.884
H7 -1.595 -0.653 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50431.21681.11542.15182.13702.1370
C21.50432.41262.22521.09521.10041.1004
O31.21682.41262.01982.58293.11773.1177
H41.11542.22522.01983.12312.55042.5504
H52.15181.09522.58293.12311.80181.8018
H62.13701.10043.11772.55041.80181.7672
H72.13701.10043.11772.55041.80181.7672

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.761 C1 C2 H6 109.277
C1 C2 H7 109.277 C2 C1 O3 124.562
C2 C1 H4 115.493 O3 C1 H4 119.945
H5 C2 H6 110.304 H5 C2 H7 110.304
H6 C2 H7 106.827
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability