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 C2H6O2 (1,2-Ethanediol)

using model chemistry: B3LYP/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B3LYP/CEP-31G*
 hartrees
Energy at 0K-46.841241
Energy at 298.15K-46.848294
Nuclear repulsion energy75.794493
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 B3LYP/CEP-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 Ag 3810 3679 0.00      
2 Ag 3014 2911 0.00      
3 Ag 1518 1466 0.00      
4 Ag 1485 1434 0.00      
5 Ag 1291 1246 0.00      
6 Ag 1071 1034 0.00      
7 Ag 982 949 0.00      
8 Ag 468 452 0.00      
9 Au 3075 2970 152.65      
10 Au 1214 1173 1.94      
11 Au 824 796 1.08      
12 Au 257 248 276.02      
13 Au 119 115 29.96      
14 Bg 3045 2940 0.00      
15 Bg 1291 1246 0.00      
16 Bg 1145 1106 0.00      
17 Bg 242 233 0.00      
18 Bu 3810 3679 38.77      
19 Bu 3018 2914 146.32      
20 Bu 1529 1477 7.63      
21 Bu 1399 1351 8.33      
22 Bu 1189 1148 122.94      
23 Bu 1059 1023 202.31      
24 Bu 283 273 23.40      

Unscaled Zero Point Vibrational Energy (zpe) 18567.3 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 17930.4 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 B3LYP/CEP-31G*
ABC
0.98953 0.13074 0.12088

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.768 0.000
C2 0.000 -0.768 0.000
O3 1.380 -1.182 0.000
O4 -1.380 1.182 0.000
H5 1.395 -2.155 0.000
H6 -1.395 2.155 0.000
H7 -0.535 -1.133 0.899
H8 -0.535 -1.133 -0.899
H9 0.535 1.133 0.899
H10 0.535 1.133 -0.899

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9 H10
C11.53672.38981.44113.23931.96702.17022.17021.10791.1079
C21.53671.44112.38981.96703.23931.10791.10792.17022.1702
O32.38981.44113.63510.97294.34072.11622.11622.62392.6239
O41.44112.38983.63514.34070.97292.62392.62392.11622.1162
H53.23931.96700.97294.34075.13452.36152.36153.51593.5159
H61.96703.23934.34070.97295.13453.51593.51592.36152.3615
H72.17021.10792.11622.62392.36153.51591.79852.50573.0843
H82.17021.10792.11622.62392.36153.51591.79853.08432.5057
H91.10792.17022.62392.11623.51592.36152.50573.08431.7985
H101.10792.17022.62392.11623.51592.36153.08432.50571.7985

picture of 1,2-Ethanediol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 106.701 C1 C2 H7 109.216
C1 C2 H8 109.216 C1 O4 H6 107.551
C2 C1 O4 106.701 C2 C1 H9 109.216
C2 C1 H10 109.216 C2 O3 H5 107.551
O3 C2 H7 111.574 O3 C2 H8 111.574
O4 C1 H9 111.574 O4 C1 H10 111.574
H7 C2 H8 108.510 H9 C1 H10 108.510
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.178      
2 C -0.178      
3 O -0.474      
4 O -0.474      
5 H 0.373      
6 H 0.373      
7 H 0.140      
8 H 0.140      
9 H 0.140      
10 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
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 4.526 -0.531 0.000
y -0.531 5.144 0.000
z 0.000 0.000 3.493


<r2> (average value of r2) Å2
<r2> 81.592
(<r2>)1/2 9.033