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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-153.690585
Energy at 298.15K-153.694489
HF Energy-153.532778
Nuclear repulsion energy69.485910
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/6-31+G**
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' 3199 3042 8.03 47.88 0.72 0.84
2 A' 3072 2922 3.06 158.54 0.01 0.02
3 A' 2958 2813 118.22 157.04 0.34 0.50
4 A' 1792 1704 172.48 10.50 0.48 0.65
5 A' 1488 1415 23.66 13.37 0.66 0.79
6 A' 1439 1369 12.15 6.45 0.38 0.55
7 A' 1406 1337 20.12 3.85 0.70 0.82
8 A' 1146 1090 23.77 2.78 0.31 0.47
9 A' 904 860 7.44 6.16 0.41 0.58
10 A' 511 486 13.31 1.45 0.41 0.58
11 A" 3142 2988 7.13 66.82 0.75 0.86
12 A" 1497 1424 12.58 7.55 0.75 0.86
13 A" 1146 1090 0.07 1.05 0.75 0.86
14 A" 785 746 0.92 5.46 0.75 0.86
15 A" 145 138 1.20 1.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12314.0 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 11710.6 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/6-31+G**
ABC
1.89616 0.33673 0.30190

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.944 -0.707 0.000
O3 1.215 0.369 0.000
H4 -0.478 1.462 0.000
H5 -0.392 -1.646 0.000
H6 -1.592 -0.652 0.879
H7 -1.592 -0.652 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50251.21811.10782.14402.13292.1329
C21.50252.41162.21781.08861.09381.0938
O31.21812.41162.01452.57713.11343.1134
H41.10782.21782.01453.10832.54572.5457
H52.14401.08862.57713.10831.78881.7888
H62.13291.09383.11342.54571.78881.7580
H72.13291.09383.11342.54571.78881.7580

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.661 C1 C2 H6 109.473
C1 C2 H7 109.473 C2 C1 O3 124.530
C2 C1 H4 115.520 O3 C1 H4 119.950
H5 C2 H6 110.101 H5 C2 H7 110.101
H6 C2 H7 106.956
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability