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: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-229.573848
Energy at 298.15K-229.581040
HF Energy-228.919673
Nuclear repulsion energy130.091475
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/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 Ag 3784 3603 0.00      
2 Ag 3039 2894 0.00      
3 Ag 1580 1505 0.00      
4 Ag 1537 1464 0.00      
5 Ag 1331 1268 0.00      
6 Ag 1122 1068 0.00      
7 Ag 1027 978 0.00      
8 Ag 488 465 0.00      
9 Au 3095 2947 111.84      
10 Au 1252 1192 2.75      
11 Au 853 813 4.00      
12 Au 258 245 273.27      
13 Au 135 129 27.70      
14 Bg 3070 2923 0.00      
15 Bg 1332 1268 0.00      
16 Bg 1194 1137 0.00      
17 Bg 252 240 0.00      
18 Bu 3784 3604 43.18      
19 Bu 3042 2897 92.58      
20 Bu 1589 1513 6.54      
21 Bu 1446 1377 14.66      
22 Bu 1225 1167 128.67      
23 Bu 1107 1054 181.18      
24 Bu 301 287 24.08      

Unscaled Zero Point Vibrational Energy (zpe) 18922.1 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 18019.5 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/6-31G*
ABC
1.00637 0.13392 0.12375

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.758 0.000
C2 0.000 -0.758 0.000
O3 1.369 -1.163 0.000
O4 -1.369 1.163 0.000
H5 1.391 -2.133 0.000
H6 -1.391 2.133 0.000
H7 -0.535 -1.119 0.892
H8 -0.535 -1.119 -0.892
H9 0.535 1.119 0.892
H10 0.535 1.119 -0.892

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9 H10
C11.51552.35831.42723.20791.95622.14592.14591.10081.1008
C21.51551.42722.35831.95623.20791.10081.10082.14592.1459
O32.35831.42723.59160.97014.29862.10232.10232.58822.5882
O41.42722.35833.59164.29860.97012.58822.58822.10232.1023
H53.20791.95620.97014.29865.09292.35212.35213.47923.4792
H61.95623.20794.29860.97015.09293.47923.47922.35212.3521
H72.14591.10082.10232.58822.35213.47921.78312.48143.0556
H82.14591.10082.10232.58822.35213.47921.78313.05562.4814
H91.10082.14592.58822.10233.47922.35212.48143.05561.7831
H101.10082.14592.58822.10233.47922.35213.05562.48141.7831

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 106.488 C1 C2 H7 109.184
C1 C2 H8 109.184 C1 O4 H6 107.844
C2 C1 O4 106.488 C2 C1 H9 109.184
C2 C1 H10 109.184 C2 O3 H5 107.844
O3 C2 H7 111.880 O3 C2 H8 111.880
O4 C1 H9 111.880 O4 C1 H10 111.880
H7 C2 H8 108.171 H9 C1 H10 108.171
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability