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: B3PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G
 hartrees
Energy at 0K-154.933199
Energy at 298.15K-154.939883
Nuclear repulsion energy81.172396
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 B3PW91/6-31G
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' 3677 3522 3.26      
2 A' 3154 3020 29.10      
3 A' 3067 2937 15.80      
4 A' 3005 2878 65.25      
5 A' 1568 1502 1.55      
6 A' 1545 1480 6.61      
7 A' 1471 1409 16.30      
8 A' 1451 1389 2.12      
9 A' 1278 1224 65.02      
10 A' 1118 1071 8.58      
11 A' 1046 1001 69.18      
12 A' 906 867 21.21      
13 A' 416 398 15.98      
14 A" 3164 3030 32.60      
15 A" 3043 2915 71.26      
16 A" 1526 1462 7.28      
17 A" 1317 1261 0.83      
18 A" 1190 1139 4.96      
19 A" 851 815 0.71      
20 A" 308 295 149.44      
21 A" 242 231 30.42      

Unscaled Zero Point Vibrational Energy (zpe) 17669.6 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 16922.2 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 B3PW91/6-31G
ABC
1.14517 0.31012 0.26874

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.183 -0.380 0.000
C2 0.000 0.567 0.000
O3 -1.199 -0.251 0.000
H4 -1.996 0.313 0.000
H5 2.126 0.179 0.000
H6 1.155 -1.021 0.886
H7 1.155 -1.021 -0.886
H8 0.028 1.216 0.889
H9 0.028 1.216 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8 H9
C11.51542.38593.25311.09551.09421.09422.16112.1611
C21.51541.45222.01172.16112.15442.15441.10101.1010
O32.38591.45220.97583.35282.63042.63042.10992.1099
H43.25312.01170.97584.12353.53383.53382.38812.3881
H51.09552.16113.35284.12351.77951.77952.50322.5032
H61.09422.15442.63043.53381.77951.77222.50473.0700
H71.09422.15442.63043.53381.77951.77223.07002.5047
H82.16111.10102.10992.38812.50322.50473.07001.7781
H92.16111.10102.10992.38812.50323.07002.50471.7781

picture of Ethanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 107.004 C1 C2 H8 110.373
C1 C2 H9 110.373 C2 C1 H5 110.696
C2 C1 H6 110.247 C2 C1 H7 110.247
C2 O3 H4 110.360 O3 C2 H8 110.707
O3 C2 H9 110.707 H5 C1 H6 108.717
H5 C1 H7 108.717 H6 C1 H7 108.152
H8 C2 H9 107.702
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.469      
2 C -0.077      
3 O -0.624      
4 H 0.368      
5 H 0.153      
6 H 0.178      
7 H 0.178      
8 H 0.147      
9 H 0.147      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.040 1.905 0.000 1.905
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 54.518
(<r2>)1/2 7.384