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: PBEPBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-230.068545
Energy at 298.15K-230.075461
Nuclear repulsion energy129.741405
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 PBEPBE/cc-pVTZ
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 3728 3703 0.00      
2 Ag 2906 2886 0.00      
3 Ag 1469 1459 0.00      
4 Ag 1433 1423 0.00      
5 Ag 1253 1244 0.00      
6 Ag 1051 1044 0.00      
7 Ag 965 958 0.00      
8 Ag 465 462 0.00      
9 Au 2958 2938 101.05      
10 Au 1177 1169 0.56      
11 Au 810 804 1.15      
12 Au 217 216 198.14      
13 Au 106 106 33.19      
14 Bg 2928 2908 0.00      
15 Bg 1260 1252 0.00      
16 Bg 1120 1113 0.00      
17 Bg 196 195 0.00      
18 Bu 3729 3704 51.43      
19 Bu 2913 2893 117.11      
20 Bu 1482 1471 4.14      
21 Bu 1366 1357 9.01      
22 Bu 1161 1153 66.33      
23 Bu 1037 1030 218.34      
24 Bu 282 280 17.24      

Unscaled Zero Point Vibrational Energy (zpe) 18006.8 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 17882.6 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 PBEPBE/cc-pVTZ
ABC
1.00892 0.13262 0.12271

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.437 0.622 0.000
C2 -0.437 -0.622 0.000
O3 0.437 -1.751 0.000
O4 -0.437 1.751 0.000
H5 -0.113 -2.549 0.000
H6 0.113 2.549 0.000
H7 -1.088 -0.602 0.894
H8 -1.088 -0.602 -0.894
H9 1.088 0.602 0.894
H10 1.088 0.602 -0.894

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9 H10
C11.51982.37251.42803.21781.95412.14972.14971.10581.1058
C21.51981.42802.37251.95413.21781.10581.10582.14972.1497
O32.37251.42803.60910.96934.31182.10822.10822.59952.5995
O41.42802.37253.60914.31180.96932.59952.59952.10822.1082
H53.21781.95410.96934.31185.10262.35362.35363.48823.4882
H61.95413.21784.31180.96935.10263.48823.48822.35362.3536
H72.14971.10582.10822.59952.35363.48821.78752.48653.0624
H82.14971.10582.10822.59952.35363.48821.78753.06242.4865
H91.10582.14972.59952.10823.48822.35362.48653.06241.7875
H101.10582.14972.59952.10823.48822.35363.06242.48651.7875

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 107.147 C1 C2 H7 108.896
C1 C2 H8 108.896 C1 O4 H6 107.666
C2 C1 O4 107.147 C2 C1 H9 108.896
C2 C1 H10 108.896 C2 O3 H5 107.666
O3 C2 H7 111.990 O3 C2 H8 111.990
O4 C1 H9 111.990 O4 C1 H10 111.990
H7 C2 H8 107.851 H9 C1 H10 107.851
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.015      
2 C 0.015      
3 O -0.317      
4 O -0.317      
5 H 0.197      
6 H 0.197      
7 H 0.053      
8 H 0.053      
9 H 0.053      
10 H 0.053      


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
Primitive
 xyz
x -26.492 5.937 0.000
y 5.937 -18.931 0.000
z 0.000 0.000 -25.617
Traceless
 xyz
x -4.218 5.937 0.000
y 5.937 7.123 0.000
z 0.000 0.000 -2.906
Polar
3z2-r2-5.812
x2-y2-7.561
xy5.937
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.204 0.105 0.000
y 0.105 6.190 0.000
z 0.000 0.000 4.569


<r2> (average value of r2) Å2
<r2> 96.219
(<r2>)1/2 9.809