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: BLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at BLYP/3-21G
 hartrees
Energy at 0K-228.877979
Energy at 298.15K-228.885015
Nuclear repulsion energy127.408153
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 BLYP/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 Ag 3310 3292 0.00      
2 Ag 2915 2899 0.00      
3 Ag 1552 1543 0.00      
4 Ag 1449 1441 0.00      
5 Ag 1278 1271 0.00      
6 Ag 976 971 0.00      
7 Ag 943 937 0.00      
8 Ag 445 442 0.00      
9 Au 2964 2948 151.20      
10 Au 1166 1159 0.04      
11 Au 866 861 2.25      
12 Au 268 266 265.58      
13 Au 115 114 10.51      
14 Bg 2931 2914 0.00      
15 Bg 1307 1299 0.00      
16 Bg 1115 1109 0.00      
17 Bg 265 263 0.00      
18 Bu 3311 3293 6.58      
19 Bu 2922 2906 102.32      
20 Bu 1566 1558 6.91      
21 Bu 1401 1393 2.10      
22 Bu 1187 1180 85.83      
23 Bu 964 959 143.14      
24 Bu 262 261 22.51      

Unscaled Zero Point Vibrational Energy (zpe) 17737.5 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 17639.9 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 BLYP/3-21G
ABC
0.95511 0.12960 0.11935

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

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 1.426 -1.148 0.000
O4 -1.426 1.148 0.000
H5 1.454 -2.156 0.000
H6 -1.454 2.156 0.000
H7 -0.548 -1.117 0.897
H8 -0.548 -1.117 -0.897
H9 0.548 1.117 0.897
H10 0.548 1.117 -0.897

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9 H10
C11.53652.38861.47583.26562.00972.15832.15831.10741.1074
C21.53651.47582.38862.00973.26561.10741.10742.15832.1583
O32.38861.47583.66141.00864.38272.16892.16892.58892.5889
O41.47582.38863.66144.38271.00862.58892.58892.16892.1689
H53.26562.00971.00864.38275.20052.42742.42743.51203.5120
H62.00973.26564.38271.00865.20053.51203.51202.42742.4274
H72.15831.10742.16892.58892.42743.51201.79352.48823.0672
H82.15831.10742.16892.58892.42743.51201.79353.06722.4882
H91.10742.15832.58892.16893.51202.42742.48823.06721.7935
H101.10742.15832.58892.16893.51202.42743.06722.48821.7935

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 104.902 C1 C2 H7 108.339
C1 C2 H8 108.339 C1 O4 H6 106.461
C2 C1 O4 104.902 C2 C1 H9 108.339
C2 C1 H10 108.339 C2 O3 H5 106.461
O3 C2 H7 113.431 O3 C2 H8 113.431
O4 C1 H9 113.431 O4 C1 H10 113.431
H7 C2 H8 108.150 H9 C1 H10 108.150
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.150      
2 C -0.150      
3 O -0.510      
4 O -0.510      
5 H 0.321      
6 H 0.321      
7 H 0.170      
8 H 0.170      
9 H 0.170      
10 H 0.170      


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 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> 98.054
(<r2>)1/2 9.902