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: HF/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 HF/6-31G
 hartrees
Energy at 0K-700.981088
Energy at 298.15K-700.988849
Nuclear repulsion energy336.278760
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 HF/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 3364 3037 2.16      
2 A 3363 3037 3.58      
3 A 3343 3018 19.59      
4 A 3339 3015 22.84      
5 A 3244 2929 46.53      
6 A 3240 2926 8.49      
7 A 1666 1504 2.66      
8 A 1660 1498 20.06      
9 A 1651 1491 15.05      
10 A 1643 1484 9.49      
11 A 1606 1450 9.58      
12 A 1598 1443 3.92      
13 A 1287 1162 0.43      
14 A 1287 1162 1.09      
15 A 1261 1139 0.38      
16 A 1261 1139 3.95      
17 A 1079 974 245.52      
18 A 1046 945 229.45      
19 A 841 759 25.81      
20 A 734 663 83.94      
21 A 713 643 40.34      
22 A 549 496 32.45      
23 A 443 400 3.66      
24 A 331 299 29.90      
25 A 262 237 28.28      
26 A 254 229 19.40      
27 A 144 130 3.39      
28 A 102 92 0.24      
29 A 90 81 6.22      
30 A 53 48 5.91      

Unscaled Zero Point Vibrational Energy (zpe) 20726.6 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 18714.0 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 HF/6-31G
ABC
0.12848 0.07766 0.06820

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 -0.875 -0.383
O2 -0.000 -1.073 1.231
O3 1.319 0.172 -0.698
O4 -1.319 0.172 -0.698
C5 1.869 1.034 0.340
C6 -1.869 1.034 0.340
H7 2.878 1.224 0.019
H8 -2.878 1.224 0.019
H9 1.306 1.954 0.378
H10 1.853 0.535 1.294
H11 -1.853 0.535 1.294
H12 -1.306 1.954 0.378

Atom - Atom Distances (Å)
  S1 O2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12
S11.62641.71341.71342.76802.76813.58513.58513.20772.86952.86953.2077
O21.62642.64822.64822.95452.95443.87693.87693.40542.45412.45403.4053
O31.71342.64822.63741.45713.46152.01324.38592.08132.09413.76283.3502
O41.71342.64822.63743.46141.45714.38592.01323.35013.76272.09412.0814
C52.76802.95451.45713.46143.73781.07614.76201.07851.07703.87443.3060
C62.76812.95443.46151.45713.73784.76201.07613.30603.87431.07701.0785
H73.58513.87692.01324.38591.07614.76205.75701.77011.77534.94824.2633
H83.58513.87694.38592.01324.76201.07615.75704.26334.94811.77531.7701
H93.20773.40542.08133.35011.07853.30601.77014.26331.77483.58232.6129
H102.86952.45412.09413.76271.07703.87431.77534.94811.77483.70553.5821
H112.86952.45403.76282.09413.87441.07704.94821.77533.58233.70551.7748
H123.20773.40533.35022.08143.30601.07854.26331.77012.61293.58211.7748

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 121.420 S1 O4 C6 121.420
O2 S1 O3 104.887 O2 S1 O4 104.886
O3 S1 O4 100.642 O3 C5 H7 104.244
O3 C5 H9 109.433 O3 C5 H10 110.556
O4 C6 H8 104.244 O4 C6 H11 110.556
O4 C6 H12 109.433 H7 C5 H9 110.482
H7 C5 H10 111.081 H8 C6 H11 111.083
H8 C6 H12 110.481 H9 C5 H10 110.850
H11 C6 H12 110.849
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 1.530 0.801    
2 O -0.816 -0.543    
3 O -0.801 -0.559    
4 O -0.801 -0.559    
5 C -0.152 0.524    
6 C -0.152 0.524    
7 H 0.205 -0.037    
8 H 0.205 -0.037    
9 H 0.171 -0.033    
10 H 0.219 -0.024    
11 H 0.219 -0.024    
12 H 0.171 -0.033    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.000 2.627 0.443 2.664
CHELPG -0.000 2.530 0.348 2.554
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.924 0.000 0.000
y 0.000 -40.369 6.286
z 0.000 6.286 -50.245
Traceless
 xyz
x 7.383 0.000 0.000
y 0.000 3.716 6.286
z 0.000 6.286 -11.099
Polar
3z2-r2-22.199
x2-y22.445
xy0.000
xz0.000
yz6.286


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.327 0.000 0.000
y 0.000 6.402 -0.423
z 0.000 -0.423 5.950


<r2> (average value of r2) Å2
<r2> 196.630
(<r2>)1/2 14.022