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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-34.187829
Energy at 298.15K-34.192444
Nuclear repulsion energy75.934512
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 3449 3097 4.21      
2 A1 3411 3063 12.03      
3 A1 1595 1433 22.67      
4 A1 1516 1361 0.01      
5 A1 1186 1065 5.04      
6 A1 1108 995 1.41      
7 A1 889 798 37.82      
8 A1 647 581 0.60      
9 A2 1039 933 0.00      
10 A2 807 724 0.00      
11 A2 595 534 0.00      
12 B1 1017 913 0.15      
13 B1 820 736 172.98      
14 B1 470 422 0.31      
15 B2 3445 3094 10.47      
16 B2 3393 3047 7.36      
17 B2 1723 1547 0.06      
18 B2 1380 1239 8.95      
19 B2 1193 1071 3.59      
20 B2 939 843 2.04      
21 B2 800 718 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15710.8 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 14108.3 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
0.26357 0.17836 0.10638

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 1.463
C2 0.000 1.246 0.255
C3 0.000 -1.246 0.255
C4 0.000 0.726 -1.012
C5 0.000 -0.726 -1.012
H6 0.000 2.283 0.542
H7 0.000 -2.283 0.542
H8 0.000 1.330 -1.906
H9 0.000 -1.330 -1.906

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9
S11.73501.73502.57922.57922.46192.46193.62183.6218
C21.73502.49101.36942.34371.07643.54022.16253.3621
C31.73502.49102.34371.36943.54021.07643.36212.1625
C42.57921.36942.34371.45222.19963.38661.07882.2422
C52.57922.34371.36941.45223.38662.19962.24221.0788
H62.46191.07643.54022.19963.38664.56622.62644.3642
H72.46193.54021.07643.38662.19964.56624.36422.6264
H83.62182.16253.36211.07882.24222.62644.36422.6605
H93.62183.36212.16252.24221.07884.36422.62642.6605

picture of Thiophene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 111.828 S1 C2 H6 120.437
S1 C3 C5 111.828 S1 C3 H7 120.437
C2 S1 C3 91.762 C2 C4 C5 112.290
C2 C4 H8 123.654 C3 C5 C4 112.290
C3 C5 H9 123.654 C4 C2 H6 127.734
C4 C5 H9 124.055 C5 C3 H7 127.734
C5 C4 H8 124.055
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 -0.044      
2 C -0.341      
3 C -0.341      
4 C -0.210      
5 C -0.210      
6 H 0.291      
7 H 0.291      
8 H 0.281      
9 H 0.281      


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 -0.867 0.867
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 3.749 0.000 0.000
y 0.000 8.626 0.000
z 0.000 0.000 10.070


<r2> (average value of r2) Å2
<r2> 81.882
(<r2>)1/2 9.049