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: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-474.374294
Energy at 298.15K-474.378654
HF Energy-474.374294
Nuclear repulsion energy97.995004
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 B1B95/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3198 3059 2.71      
2 A1 1518 1453 2.59      
3 A1 1128 1079 0.40      
4 A1 1068 1022 6.41      
5 A1 588 563 22.90      
6 A2 3288 3146 0.00      
7 A2 1217 1164 0.00      
8 A2 842 806 0.00      
9 B1 3308 3164 0.88      
10 B1 920 880 2.19      
11 B1 855 818 4.36      
12 B2 3195 3057 3.12      
13 B2 1495 1431 7.81      
14 B2 1094 1047 44.44      
15 B2 603 577 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 12158.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 11631.9 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 B1B95/3-21G
ABC
0.73633 0.32277 0.24679

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.915
C2 0.000 0.740 -0.853
C3 0.000 -0.740 -0.853
H4 -0.919 1.253 -1.102
H5 0.919 1.253 -1.102
H6 0.919 -1.253 -1.102
H7 -0.919 -1.253 -1.102

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.91691.91692.54652.54652.54652.5465
C21.91691.48081.08181.08182.20932.2093
C31.91691.48082.20932.20931.08181.0818
H42.54651.08182.20931.83893.10832.5060
H52.54651.08182.20931.83892.50603.1083
H62.54652.20931.08183.10832.50601.8389
H72.54652.20931.08182.50603.10831.8389

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.278 S1 C2 H4 113.295
S1 C2 H5 113.295 S1 C3 C2 67.278
S1 C3 H6 113.295 S1 C3 H7 113.295
C2 S1 C3 45.444 C2 C3 H6 118.284
C2 C3 H7 118.284 C3 C2 H4 118.284
C3 C2 H5 118.284 H4 C2 H5 116.414
H6 C3 H7 116.414
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.150      
2 C -0.614      
3 C -0.614      
4 H 0.270      
5 H 0.270      
6 H 0.270      
7 H 0.270      


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 -2.366 2.366
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.137 0.000 0.000
y 0.000 -24.390 0.000
z 0.000 0.000 -26.806
Traceless
 xyz
x -0.539 0.000 0.000
y 0.000 2.081 0.000
z 0.000 0.000 -1.542
Polar
3z2-r2-3.085
x2-y2-1.747
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.374 0.000 0.000
y 0.000 4.526 0.000
z 0.000 0.000 6.445


<r2> (average value of r2) Å2
<r2> 59.330
(<r2>)1/2 7.703