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All results from a given calculation for C4H4S (Thiophene)

using model chemistry: HF/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 HF/CEP-31G
 hartrees
Energy at 0K-34.082054
Energy at 298.15K-34.086669
Nuclear repulsion energy75.075882
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 HF/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 3477 3134 7.66      
2 A1 3429 3091 8.91      
3 A1 1618 1458 24.78      
4 A1 1500 1352 0.01      
5 A1 1210 1091 3.83      
6 A1 1100 992 2.87      
7 A1 850 766 37.63      
8 A1 636 574 2.27      
9 A2 1074 968 0.00      
10 A2 832 750 0.00      
11 A2 605 545 0.00      
12 B1 1045 942 0.00      
13 B1 828 746 202.57      
14 B1 460 414 0.02      
15 B2 3471 3129 9.97      
16 B2 3410 3074 9.13      
17 B2 1716 1547 0.01      
18 B2 1388 1251 18.65      
19 B2 1213 1094 4.33      
20 B2 931 839 0.54      
21 B2 759 685 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 15775.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 14220.0 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 HF/CEP-31G
ABC
0.25681 0.17156 0.10285

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.504
C2 0.000 1.268 0.240
C3 0.000 -1.268 0.240
C4 0.000 0.731 -1.020
C5 0.000 -0.731 -1.020
H6 0.000 2.302 0.524
H7 0.000 -2.302 0.524
H8 0.000 1.325 -1.916
H9 0.000 -1.325 -1.916

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9
S11.79061.79062.62822.62822.50202.50203.66833.6683
C21.79062.53601.36952.36321.07213.58112.15703.3724
C31.79062.53602.36321.36953.58111.07213.37242.1570
C42.62821.36952.36321.46262.20233.40351.07512.2432
C52.62822.36321.36951.46263.40352.20232.24321.0751
H62.50201.07213.58112.20233.40354.60372.62834.3713
H72.50203.58111.07213.40352.20234.60374.37132.6283
H83.66832.15703.37241.07512.24322.62834.37132.6501
H93.66833.37242.15702.24321.07514.37132.62832.6501

picture of Thiophene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 111.848 S1 C2 H6 119.729
S1 C3 C5 111.848 S1 C3 H7 119.729
C2 S1 C3 90.163 C2 C4 C5 113.070
C2 C4 H8 123.406 C3 C5 C4 113.070
C3 C5 H9 123.406 C4 C2 H6 128.422
C4 C5 H9 123.524 C5 C3 H7 128.422
C5 C4 H8 123.524
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.191      
2 C -0.507      
3 C -0.507      
4 C -0.140      
5 C -0.140      
6 H 0.282      
7 H 0.282      
8 H 0.270      
9 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 -1.405 1.405
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.118 0.000 0.000
y 0.000 8.605 0.000
z 0.000 0.000 9.994


<r2> (average value of r2) Å2
<r2> 83.981
(<r2>)1/2 9.164