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/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-30.611666
Energy at 298.15K-30.618349
HF Energy-30.159870
Nuclear repulsion energy48.841728
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/CEP-121G*
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' 3792 3613 19.45 99.11 0.29 0.45
2 A' 3174 3025 30.73 57.18 0.75 0.86
3 A' 3076 2931 16.42 147.40 0.01 0.03
4 A' 3042 2899 74.38 108.06 0.12 0.21
5 A' 1568 1494 1.23 4.07 0.75 0.86
6 A' 1538 1465 3.83 16.37 0.74 0.85
7 A' 1482 1412 16.65 6.09 0.41 0.59
8 A' 1429 1361 0.81 0.32 0.71 0.83
9 A' 1291 1230 85.11 4.02 0.70 0.83
10 A' 1111 1058 23.59 7.65 0.60 0.75
11 A' 1061 1010 55.31 4.93 0.18 0.30
12 A' 912 869 13.74 7.08 0.31 0.47
13 A' 414 394 12.92 0.33 0.61 0.75
14 A" 3187 3037 33.87 42.86 0.75 0.86
15 A" 3095 2949 58.70 93.69 0.75 0.86
16 A" 1520 1448 6.39 10.50 0.75 0.86
17 A" 1306 1245 0.19 10.94 0.75 0.86
18 A" 1196 1139 3.55 2.72 0.75 0.86
19 A" 826 787 0.04 0.08 0.75 0.86
20 A" 303 289 93.42 2.46 0.75 0.86
21 A" 249 237 54.52 0.71 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17784.5 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 16945.0 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/CEP-121G*
ABC
1.14669 0.31003 0.26895

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.182 -0.398 0.000
C2 0.000 0.566 0.000
O3 -1.202 -0.236 0.000
H4 -1.959 0.374 0.000
H5 2.126 0.158 0.000
H6 1.146 -1.034 0.889
H7 1.146 -1.034 -0.889
H8 0.032 1.208 0.892
H9 0.032 1.208 -0.892

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8 H9
C11.52542.38913.23461.09541.09361.09362.16792.1679
C21.52541.44461.96852.16472.15942.15941.09981.0998
O32.38911.44460.97253.35062.63382.63382.09832.0983
H43.23461.96850.97254.09063.52313.52312.33572.3357
H51.09542.16473.35064.09061.78091.78092.50692.5069
H61.09362.15942.63383.52311.78091.77792.50373.0727
H71.09362.15942.63383.52311.78091.77793.07272.5037
H82.16791.09982.09832.33572.50692.50373.07271.7846
H92.16791.09982.09832.33572.50693.07272.50371.7846

picture of Ethanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 107.073 C1 C2 H8 110.286
C1 C2 H9 110.286 C2 C1 H5 110.295
C2 C1 H6 109.987 C2 C1 H7 109.987
C2 O3 H4 107.441 O3 C2 H8 110.374
O3 C2 H9 110.374 H5 C1 H6 108.889
H5 C1 H7 108.889 H6 C1 H7 108.759
H8 C2 H9 108.453
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability