return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CH2OH (Ethanol)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-154.656812
Energy at 298.15K-154.663514
HF Energy-154.098693
Nuclear repulsion energy82.061535
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 MP2/6-31G(2df,p)
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' 3893 3677 30.17 82.81 0.29 0.44
2 A' 3215 3036 14.95 50.16 0.75 0.86
3 A' 3117 2944 9.33 95.08 0.01 0.02
4 A' 3059 2889 52.51 94.71 0.11 0.19
5 A' 1565 1478 1.77 3.78 0.68 0.81
6 A' 1533 1447 2.41 18.07 0.75 0.86
7 A' 1483 1400 12.88 3.06 0.54 0.70
8 A' 1418 1340 1.86 0.62 0.73 0.85
9 A' 1293 1222 74.44 4.39 0.74 0.85
10 A' 1143 1079 32.10 5.00 0.52 0.69
11 A' 1062 1003 39.55 3.69 0.14 0.24
12 A' 925 874 8.63 5.43 0.30 0.46
13 A' 416 393 10.78 0.22 0.66 0.80
14 A" 3220 3041 16.00 39.35 0.75 0.86
15 A" 3104 2931 48.09 72.04 0.75 0.86
16 A" 1514 1430 4.60 13.19 0.75 0.86
17 A" 1319 1246 0.01 9.94 0.75 0.86
18 A" 1202 1136 4.45 1.96 0.75 0.86
19 A" 827 781 0.08 0.07 0.75 0.86
20 A" 301 285 86.62 2.63 0.75 0.86
21 A" 251 237 31.01 0.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17929.1 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 16934.1 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 MP2/6-31G(2df,p)
ABC
1.16522 0.31731 0.27504

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.164 -0.410 0.000
C2 0.000 0.559 0.000
O3 -1.188 -0.217 0.000
H4 -1.930 0.392 0.000
H5 2.114 0.125 0.000
H6 1.119 -1.046 0.884
H7 1.119 -1.046 -0.884
H8 0.050 1.206 0.885
H9 0.050 1.206 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8 H9
C11.51452.35953.19551.09071.09001.09002.15292.1529
C21.51451.41911.93692.15792.14772.14771.09711.0971
O32.35951.41910.95963.31952.60622.60622.08332.0833
H43.19551.93690.95964.05233.48513.48512.31612.3161
H51.09072.15793.31954.05231.77301.77302.49222.4922
H61.09002.14772.60623.48511.77301.76732.49373.0570
H71.09002.14772.60623.48511.77301.76733.05702.4937
H82.15291.09712.08332.31612.49222.49373.05701.7694
H92.15291.09712.08332.31612.49223.05702.49371.7694

picture of Ethanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 107.044 C1 C2 H8 110.025
C1 C2 H9 110.025 C2 C1 H5 110.808
C2 C1 H6 110.031 C2 C1 H7 110.031
C2 O3 H4 107.463 O3 C2 H8 111.137
O3 C2 H9 111.137 H5 C1 H6 108.790
H5 C1 H7 108.790 H6 C1 H7 108.335
H8 C2 H9 107.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability