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: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-153.556654
Energy at 298.15K-153.563339
HF Energy-153.220143
Nuclear repulsion energy80.380733
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 QCISD/3-21G
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' 3464 3358 2.56      
2 A' 3111 3015 24.73      
3 A' 3042 2948 11.54      
4 A' 2984 2893 46.18      
5 A' 1611 1562 2.26      
6 A' 1582 1533 4.90      
7 A' 1486 1441 8.10      
8 A' 1472 1426 5.37      
9 A' 1305 1265 68.88      
10 A' 1119 1085 0.07      
11 A' 999 969 50.86      
12 A' 889 861 5.50      
13 A' 397 384 14.65      
14 A" 3118 3022 27.91      
15 A" 3008 2915 63.30      
16 A" 1564 1516 3.74      
17 A" 1337 1296 1.04      
18 A" 1198 1162 4.07      
19 A" 863 836 0.00      
20 A" 315 305 133.46      
21 A" 244 237 13.92      

Unscaled Zero Point Vibrational Energy (zpe) 17554.0 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 17013.3 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 QCISD/3-21G
ABC
1.09836 0.30744 0.26437

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.190 -0.390 0.000
C2 0.000 0.588 0.000
O3 -1.206 -0.262 0.000
H4 -1.998 0.338 0.000
H5 2.143 0.157 0.000
H6 1.135 -1.028 0.891
H7 1.135 -1.028 -0.891
H8 0.043 1.235 0.893
H9 0.043 1.235 -0.893

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8 H9
C11.54062.39943.27071.09861.09731.09732.18042.1804
C21.54061.47482.01362.18602.16642.16641.10341.1034
O32.39941.47480.99423.37472.61902.61902.14382.1438
H43.27072.01360.99424.14523.53243.53242.40152.4015
H51.09862.18603.37474.14521.79291.79292.52372.5237
H61.09732.16642.61903.53241.79291.78222.51273.0814
H71.09732.16642.61903.53241.79291.78223.08142.5127
H82.18041.10342.14382.40152.52372.51273.08141.7854
H92.18041.10342.14382.40152.52373.08142.51271.7854

picture of Ethanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 105.422 C1 C2 H8 110.005
C1 C2 H9 110.005 C2 C1 H5 110.729
C2 C1 H6 109.268 C2 C1 H7 109.268
C2 O3 H4 107.692 O3 C2 H8 111.702
O3 C2 H9 111.702 H5 C1 H6 109.471
H5 C1 H7 109.471 H6 C1 H7 108.599
H8 C2 H9 108.001
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability