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: B1B95/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at B1B95/6-31+G**
 hartrees
Energy at 0K-703.553003
Energy at 298.15K-703.560906
Nuclear repulsion energy349.014824
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 B1B95/6-31+G**
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 3198 3059 6.69      
2 A 3182 3044 7.17      
3 A 3174 3037 9.76      
4 A 3138 3002 19.43      
5 A 3080 2946 29.29      
6 A 3049 2917 53.56      
7 A 1507 1442 15.80      
8 A 1505 1440 9.31      
9 A 1492 1427 9.14      
10 A 1483 1419 9.27      
11 A 1465 1402 0.33      
12 A 1451 1388 1.00      
13 A 1211 1159 162.91      
14 A 1186 1135 1.52      
15 A 1182 1130 3.77      
16 A 1174 1123 1.94      
17 A 1163 1112 3.14      
18 A 1060 1014 135.41      
19 A 1023 978 223.35      
20 A 737 705 105.93      
21 A 676 647 221.01      
22 A 566 541 16.48      
23 A 454 434 3.02      
24 A 378 362 8.50      
25 A 275 263 5.00      
26 A 221 212 9.14      
27 A 161 154 3.10      
28 A 121 116 4.55      
29 A 97 93 4.36      
30 A 72 69 3.95      

Unscaled Zero Point Vibrational Energy (zpe) 19739.8 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 18883.1 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 B1B95/6-31+G**
ABC
0.16333 0.07830 0.06682

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 -0.017 0.611 -0.487
O2 -0.064 1.350 0.783
O3 -0.892 -0.794 -0.234
O4 1.405 -0.168 -0.622
C5 -2.223 -0.580 0.242
C6 1.921 -0.809 0.559
H7 -2.644 -1.573 0.390
H8 2.945 -1.079 0.311
H9 -2.215 -0.034 1.188
H10 -2.826 -0.040 -0.496
H11 1.906 -0.117 1.402
H12 1.333 -1.700 0.785

Atom - Atom Distances (Å)
  S1 O2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12
S11.47031.67441.62742.61012.62043.52693.50252.83732.88272.79222.9632
O21.47032.51372.53752.94562.94153.91863.89612.58953.34572.53273.3547
O31.67442.51372.41231.42932.92242.01633.88612.08532.09193.31142.6097
O41.62742.53752.41233.75181.43954.40372.01784.04924.23442.08612.0810
C52.61012.94561.42933.75184.16171.08925.19231.09211.09524.31343.7674
C62.62042.94152.92241.43954.16174.63111.08824.25384.92251.09141.0904
H73.52693.91862.01634.40371.08924.63115.61141.78561.78034.88333.9987
H83.50253.89613.88612.01785.19231.08825.61145.33695.91871.78831.7912
H92.83732.58952.08534.04921.09214.25381.78565.33691.79144.12673.9398
H102.88273.34572.09194.23441.09524.92251.78035.91871.79145.09854.6574
H112.79222.53273.31142.08614.31341.09144.88331.78834.12675.09851.7932
H122.96323.35472.60972.08103.76741.09043.99871.79123.93984.65741.7932

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 114.253 S1 O4 C6 117.260
O2 S1 O3 105.950 O2 S1 O4 109.898
O3 S1 O4 93.864 O3 C5 H7 105.581
O3 C5 H9 110.883 O3 C5 H10 111.230
O4 C6 H8 105.084 O4 C6 H11 110.272
O4 C6 H12 109.919 H7 C5 H9 109.891
H7 C5 H10 109.182 H8 C6 H11 110.273
H8 C6 H12 110.611 H9 C5 H10 109.974
H11 C6 H12 110.554
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 1.069      
2 O -0.629      
3 O -0.501      
4 O -0.420      
5 C -0.280      
6 C -0.294      
7 H 0.171      
8 H 0.173      
9 H 0.185      
10 H 0.157      
11 H 0.188      
12 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.770 -1.597 0.206 1.784
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.818 -0.788 1.924
y -0.788 -45.240 -4.038
z 1.924 -4.038 -44.451
Traceless
 xyz
x 10.027 -0.788 1.924
y -0.788 -5.605 -4.038
z 1.924 -4.038 -4.422
Polar
3z2-r2-8.843
x2-y210.422
xy-0.788
xz1.924
yz-4.038


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.725 -0.061 0.045
y -0.061 7.898 0.186
z 0.045 0.186 7.045


<r2> (average value of r2) Å2
<r2> 191.123
(<r2>)1/2 13.825