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 C2H6O3S (Sulfurous acid, dimethyl ester)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-703.159017
Energy at 298.15K-703.166883
HF Energy-702.841450
Nuclear repulsion energy347.094933
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 B2PLYP/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 A 3223 3059 11.06      
2 A 3206 3043 10.90      
3 A 3203 3041 11.71      
4 A 3162 3002 23.01      
5 A 3112 2953 25.46      
6 A 3076 2920 48.60      
7 A 1556 1477 14.17      
8 A 1555 1476 5.50      
9 A 1539 1461 5.60      
10 A 1535 1457 6.77      
11 A 1503 1427 3.38      
12 A 1490 1414 0.95      
13 A 1211 1149 61.53      
14 A 1208 1147 2.42      
15 A 1199 1138 50.71      
16 A 1195 1134 8.62      
17 A 1187 1127 9.87      
18 A 1047 993 131.34      
19 A 1010 959 230.90      
20 A 727 690 95.72      
21 A 671 637 215.00      
22 A 558 530 15.23      
23 A 450 427 3.13      
24 A 373 354 8.05      
25 A 285 270 5.67      
26 A 222 211 7.57      
27 A 159 151 3.78      
28 A 133 127 3.85      
29 A 86 81 4.10      
30 A 65 62 3.42      

Unscaled Zero Point Vibrational Energy (zpe) 19971.9 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 18957.4 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 B2PLYP/6-31G*
ABC
0.16023 0.07793 0.06620

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.011 0.026 -0.106
O2 0.014 1.657 0.023
O3 1.448 -0.923 0.024
O4 -1.487 -0.916 0.019
C5 2.575 -0.013 0.061
C6 -2.600 0.003 0.056
H7 3.416 -0.674 0.138
H8 -3.388 -0.653 0.126
H9 2.604 0.559 -0.848
H10 2.495 0.629 0.920
H11 -2.420 0.651 0.898
H12 -2.533 0.591 -0.761

Atom - Atom Distances (Å)
  S1 O2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12
S11.63631.72681.77342.56972.61573.48453.47432.74922.75422.70392.6873
O21.63632.95182.97813.05773.09254.12554.11332.94512.83132.77522.8701
O31.72682.95182.93501.44914.15241.98684.84512.07212.07514.26694.3312
O41.77342.97812.93504.16121.44364.91021.92264.43404.36472.02451.9930
C52.56973.05771.44914.16125.17461.07245.99811.07451.07505.10845.2091
C62.61573.09254.15241.44365.17466.05401.02855.31065.20471.07711.0084
H73.48454.12551.98684.91021.07246.05406.80441.77541.77676.03286.1482
H83.47434.11334.84511.92265.99811.02856.80446.19086.07331.79801.7506
H92.74922.94512.07214.43401.07455.31061.77546.19081.77275.31995.1380
H102.75422.83132.07514.36471.07505.20471.77676.07331.77274.91535.3016
H112.70392.77524.26692.02455.10841.07716.03281.79805.31994.91531.6637
H122.68732.87014.33121.99305.20911.00846.14821.75065.13805.30161.6637

picture of Sulfurous acid, dimethyl ester state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 O3 C5 107.701 S1 O4 C6 108.360
O2 S1 O3 122.704 O2 S1 O4 121.658
O3 S1 O4 113.957 O3 C5 H7 102.970
O3 C5 H9 109.492 O3 C5 H10 109.707
O4 C6 H8 100.763 O4 C6 H11 105.949
O4 C6 H12 107.407 H7 C5 H9 111.577
H7 C5 H10 111.660 H8 C6 H11 117.261
H8 C6 H12 118.501 H9 C5 H10 111.119
H11 C6 H12 105.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 1.221      
2 O -0.644      
3 O -0.632      
4 O -0.593      
5 C -0.225      
6 C -0.230      
7 H 0.185      
8 H 0.185      
9 H 0.161      
10 H 0.191      
11 H 0.187      
12 H 0.195      


Electric dipole moments


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 8.733 0.034 -0.035
y 0.034 6.856 0.149
z -0.035 0.149 5.899


<r2> (average value of r2) Å2
<r2> 192.191
(<r2>)1/2 13.863