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: LSDA/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at LSDA/3-21G*
 hartrees
Energy at 0K-697.574880
Energy at 298.15K-697.583014
Nuclear repulsion energy350.515090
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 LSDA/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 A 3099 3043 2.02      
2 A 3097 3041 12.56      
3 A 3039 2984 8.91      
4 A 3038 2983 11.56      
5 A 2963 2910 41.23      
6 A 2961 2908 8.03      
7 A 1518 1491 0.93      
8 A 1499 1472 29.35      
9 A 1491 1464 26.39      
10 A 1474 1447 1.69      
11 A 1415 1390 24.69      
12 A 1396 1371 3.83      
13 A 1172 1151 88.83      
14 A 1126 1106 4.47      
15 A 1123 1103 4.75      
16 A 1105 1085 3.82      
17 A 1105 1085 0.15      
18 A 975 958 100.72      
19 A 955 938 88.26      
20 A 693 681 77.12      
21 A 686 674 204.78      
22 A 584 573 8.05      
23 A 472 463 0.17      
24 A 334 328 13.31      
25 A 311 306 14.36      
26 A 308 302 21.41      
27 A 208 204 0.41      
28 A 160 157 0.67      
29 A 127 125 2.43      
30 A 69 68 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 19251.4 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 18904.9 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 LSDA/3-21G*
ABC
0.13467 0.08866 0.07627

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 -0.000 -0.897 -0.260
O2 -0.000 -0.890 1.225
O3 1.286 0.043 -0.719
O4 -1.285 0.043 -0.719
C5 1.681 1.073 0.247
C6 -1.682 1.073 0.247
H7 1.195 2.036 0.006
H8 -2.774 1.175 0.176
H9 1.386 0.744 1.261
H10 2.774 1.175 0.176
H11 -1.386 0.743 1.261
H12 -1.195 2.036 0.007

Atom - Atom Distances (Å)
  S1 O2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12
S11.48481.65761.65762.63962.63963.17823.48972.63163.48992.63173.1782
O21.48482.51062.51062.76422.76413.38763.61402.14283.61402.14273.3874
O31.65762.51062.57111.46673.28622.12264.30852.10262.07313.39843.2634
O41.65762.51062.57113.28591.46673.26302.07303.39804.30832.10272.1226
C52.63962.76421.46673.28593.36311.10514.45731.10671.09953.24783.0424
C62.63962.76413.28621.46673.36313.04261.09953.24744.45731.10671.1051
H73.17823.38762.12263.26301.10513.04264.06461.81151.80683.14742.3894
H83.48973.61404.30852.07304.45731.09954.06464.32065.54811.81401.8068
H92.63162.14282.10263.39801.10673.24741.81154.32061.81402.77193.1468
H103.48993.61402.07314.30831.09954.45731.80685.54811.81404.32094.0646
H112.63172.14273.39842.10273.24781.10673.14741.81402.77194.32091.8114
H123.17823.38743.26342.12263.04241.10512.38941.80683.14684.06461.8114

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 115.177 S1 O4 C6 115.182
O2 S1 O3 105.923 O2 S1 O4 105.927
O3 S1 O4 101.708 O3 C5 H7 110.453
O3 C5 H9 108.778 O3 C5 H10 106.895
O4 C6 H8 106.894 O4 C6 H11 108.783
O4 C6 H12 110.459 H7 C5 H9 109.971
H7 C5 H10 110.080 H8 C6 H11 110.617
H8 C6 H12 110.079 H9 C5 H10 110.612
H11 C6 H12 109.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.905      
2 O -0.449      
3 O -0.452      
4 O -0.452      
5 C -0.493      
6 C -0.493      
7 H 0.226      
8 H 0.252      
9 H 0.238      
10 H 0.252      
11 H 0.238      
12 H 0.226      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.001 2.267 0.710 2.375
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.866 0.001 0.001
y 0.001 -39.271 2.545
z 0.001 2.545 -46.790
Traceless
 xyz
x 4.165 0.001 0.001
y 0.001 3.557 2.545
z 0.001 2.545 -7.722
Polar
3z2-r2-15.444
x2-y20.405
xy0.001
xz0.001
yz2.545


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.917 0.000 0.000
y 0.000 6.734 -0.017
z 0.000 -0.017 5.379


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000