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 C2H4S (Thiirane)

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-476.777051
Energy at 298.15K-476.781527
HF Energy-476.777051
Nuclear repulsion energy101.436974
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 B1B95/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3158 3016 12.22      
2 A1 1509 1440 5.04      
3 A1 1172 1119 2.66      
4 A1 1053 1006 0.49      
5 A1 672 642 24.38      
6 A2 3244 3097 0.00      
7 A2 1191 1137 0.00      
8 A2 909 868 0.00      
9 B1 3257 3110 5.50      
10 B1 971 927 5.30      
11 B1 838 801 0.76      
12 B2 3157 3014 12.39      
13 B2 1478 1411 0.43      
14 B2 1080 1031 34.85      
15 B2 712 680 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 12200.5 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 11649.0 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 B1B95/6-31G**
ABC
0.73951 0.36244 0.26940

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.862
C2 0.000 0.739 -0.792
C3 0.000 -0.739 -0.792
H4 -0.914 1.252 -1.073
H5 0.914 1.252 -1.073
H6 0.914 -1.252 -1.073
H7 -0.914 -1.252 -1.073

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81141.81142.47942.47942.47942.4794
C21.81141.47851.08491.08492.20852.2085
C31.81141.47852.20852.20851.08491.0849
H42.47941.08492.20851.82773.09932.5031
H52.47941.08492.20851.82772.50313.0993
H62.47942.20851.08493.09932.50311.8277
H72.47942.20851.08492.50313.09931.8277

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.914 S1 C2 H4 115.460
S1 C2 H5 115.460 S1 C3 C2 65.914
S1 C3 H6 115.460 S1 C3 H7 115.460
C2 S1 C3 48.172 C2 C3 H6 118.179
C2 C3 H7 118.179 C3 C2 H4 118.179
C3 C2 H5 118.179 H4 C2 H5 114.773
H6 C3 H7 114.773
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.007      
2 C -0.341      
3 C -0.341      
4 H 0.169      
5 H 0.169      
6 H 0.169      
7 H 0.169      


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 -2.069 2.069
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.803 0.000 0.000
y 0.000 -23.962 0.000
z 0.000 0.000 -25.946
Traceless
 xyz
x -0.849 0.000 0.000
y 0.000 1.912 0.000
z 0.000 0.000 -1.063
Polar
3z2-r2-2.126
x2-y2-1.841
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.091 0.000 0.000
y 0.000 4.901 0.000
z 0.000 0.000 6.227


<r2> (average value of r2) Å2
<r2> 55.945
(<r2>)1/2 7.480