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: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-153.553563
Energy at 298.15K-153.560254
HF Energy-153.220476
Nuclear repulsion energy80.481095
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 CCD/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' 3497 3345 1.97      
2 A' 3124 2988 23.91      
3 A' 3054 2922 11.04      
4 A' 2999 2869 43.71      
5 A' 1615 1545 1.84      
6 A' 1586 1517 4.94      
7 A' 1495 1430 7.39      
8 A' 1477 1413 5.93      
9 A' 1312 1255 69.41      
10 A' 1127 1078 0.26      
11 A' 1010 966 50.22      
12 A' 897 858 4.40      
13 A' 399 382 14.82      
14 A" 3132 2995 27.31      
15 A" 3024 2893 60.50      
16 A" 1568 1500 3.84      
17 A" 1343 1285 0.94      
18 A" 1203 1151 4.42      
19 A" 865 827 0.00      
20 A" 315 302 135.20      
21 A" 246 236 13.45      

Unscaled Zero Point Vibrational Energy (zpe) 17644.1 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 16876.6 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 CCD/3-21G*
ABC
1.10311 0.30790 0.26494

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.189 -0.391 0.000
C2 0.000 0.586 0.000
O3 -1.205 -0.259 0.000
H4 -1.996 0.340 0.000
H5 2.142 0.155 0.000
H6 1.134 -1.029 0.891
H7 1.134 -1.029 -0.891
H8 0.043 1.233 0.892
H9 0.043 1.233 -0.892

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7 H8 H9
C11.53922.39753.26781.09801.09671.09672.17842.1784
C21.53921.47132.01092.18452.16492.16491.10271.1027
O32.39751.47130.99213.37172.61842.61842.13962.1396
H43.26782.01090.99214.14153.53033.53032.39822.3982
H51.09802.18453.37174.14151.79171.79172.52162.5216
H61.09672.16492.61843.53031.79171.78112.51083.0792
H71.09672.16492.61843.53031.79171.78113.07922.5108
H82.17841.10272.13962.39822.52162.51083.07921.7841
H92.17841.10272.13962.39822.52163.07922.51081.7841

picture of Ethanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 105.553 C1 C2 H8 109.993
C1 C2 H9 109.993 C2 C1 H5 110.746
C2 C1 H6 109.290 C2 C1 H7 109.290
C2 O3 H4 107.848 O3 C2 H8 111.653
O3 C2 H9 111.653 H5 C1 H6 109.447
H5 C1 H7 109.447 H6 C1 H7 108.586
H8 C2 H9 107.994
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability