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 C4H4S (Thiophene)

using model chemistry: B1B95/CEP-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/CEP-31G
 hartrees
Energy at 0K-34.997378
Energy at 298.15K-35.001713
Nuclear repulsion energy74.525623
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/CEP-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 3304 3163 3.02      
2 A1 3254 3116 4.85      
3 A1 1510 1446 18.74      
4 A1 1387 1328 0.00      
5 A1 1104 1057 3.61      
6 A1 1057 1012 4.80      
7 A1 811 776 29.72      
8 A1 591 566 0.33      
9 A2 967 926 0.00      
10 A2 730 699 0.00      
11 A2 559 535 0.00      
12 B1 920 881 0.30      
13 B1 749 718 209.89      
14 B1 434 415 0.92      
15 B2 3298 3158 3.00      
16 B2 3235 3097 5.64      
17 B2 1582 1515 0.11      
18 B2 1265 1211 17.49      
19 B2 1110 1063 7.07      
20 B2 850 814 0.46      
21 B2 718 688 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 14716.8 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 14091.4 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/CEP-31G
ABC
0.25539 0.16863 0.10157

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.241
C2 0.000 1.273 -0.026
C3 0.000 -1.273 -0.026
C4 0.000 0.728 -1.305
C5 0.000 -0.728 -1.305
H6 0.000 2.318 0.271
H7 0.000 -2.318 0.271
H8 0.000 1.336 -2.209
H9 0.000 -1.336 -2.209

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9
S11.79591.79592.64842.64842.51242.51243.69993.6999
C21.79592.54541.39052.37451.08633.60252.18423.4014
C31.79592.54542.37451.39053.60251.08633.40142.1842
C42.64841.39052.37451.45552.23893.42911.08932.2526
C52.64842.37451.39051.45553.42912.23892.25261.0893
H62.51241.08633.60252.23893.42914.63512.66774.4156
H72.51243.60251.08633.42912.23894.63514.41562.6677
H83.69992.18423.40141.08932.25262.66774.41562.6710
H93.69993.40142.18422.25261.08934.41562.66772.6710

picture of Thiophene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 111.801 S1 C2 H6 119.253
S1 C3 C5 111.801 S1 C3 H7 119.253
C2 S1 C3 90.252 C2 C4 C5 113.073
C2 C4 H8 123.014 C3 C5 C4 113.073
C3 C5 H9 123.014 C4 C2 H6 128.945
C4 C5 H9 123.913 C5 C3 H7 128.945
C5 C4 H8 123.913
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.208      
2 C -0.534      
3 C -0.534      
4 C -0.164      
5 C -0.164      
6 H 0.303      
7 H 0.303      
8 H 0.292      
9 H 0.292      


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 -0.923 0.923
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.876 0.000 0.000
y 0.000 -30.083 0.000
z 0.000 0.000 -34.049
Traceless
 xyz
x -7.810 0.000 0.000
y 0.000 6.879 0.000
z 0.000 0.000 0.931
Polar
3z2-r21.862
x2-y2-9.792
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.188 0.000 0.000
y 0.000 9.030 0.000
z 0.000 0.000 10.043


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