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All results from a given calculation for C4H4S (Thiophene)

using model chemistry: HF/CEP-121G

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-121G
 hartrees
Energy at 0K-34.093259
Energy at 298.15K-34.097900
Nuclear repulsion energy75.344916
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-121G
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 3425 3126 4.36      
2 A1 3378 3083 7.48      
3 A1 1592 1453 25.65      
4 A1 1490 1359 0.00      
5 A1 1208 1102 3.84      
6 A1 1087 992 2.59      
7 A1 844 770 33.37      
8 A1 637 582 2.77      
9 A2 1075 981 0.00      
10 A2 816 744 0.00      
11 A2 609 555 0.00      
12 B1 1040 949 0.33      
13 B1 815 744 208.12      
14 B1 460 420 0.09      
15 B2 3420 3121 3.58      
16 B2 3361 3067 8.53      
17 B2 1694 1546 0.03      
18 B2 1386 1265 20.99      
19 B2 1208 1102 2.86      
20 B2 935 854 0.76      
21 B2 754 688 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 15617.2 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 14250.7 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-121G
ABC
0.25806 0.17266 0.10345

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.503
C2 0.000 1.266 0.234
C3 0.000 -1.266 0.234
C4 0.000 0.729 -1.013
C5 0.000 -0.729 -1.013
H6 0.000 2.297 0.515
H7 0.000 -2.297 0.515
H8 0.000 1.318 -1.909
H9 0.000 -1.318 -1.909

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9
S11.79241.79242.61902.61902.50072.50073.65783.6578
C21.79242.53121.35712.35181.06933.57392.14353.3565
C31.79242.53122.35181.35713.57391.06933.35652.1435
C42.61901.35712.35181.45752.18953.38981.07272.2344
C52.61902.35181.35711.45753.38982.18952.23441.0727
H62.50071.06933.57392.18953.38984.59452.61454.3527
H72.50073.57391.06933.38982.18954.59454.35272.6145
H83.65782.14353.35651.07272.23442.61454.35272.6357
H93.65783.35652.14352.23441.07274.35272.61452.6357

picture of Thiophene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 111.780 S1 C2 H6 119.669
S1 C3 C5 111.780 S1 C3 H7 119.669
C2 S1 C3 89.837 C2 C4 C5 113.301
C2 C4 H8 123.390 C3 C5 C4 113.301
C3 C5 H9 123.390 C4 C2 H6 128.551
C4 C5 H9 123.309 C5 C3 H7 128.551
C5 C4 H8 123.309
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.286      
2 C -0.526      
3 C -0.526      
4 C -0.041      
5 C -0.041      
6 H 0.216      
7 H 0.216      
8 H 0.208      
9 H 0.208      


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 -1.364 1.364
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 4.136 0.000 0.000
y 0.000 8.826 0.000
z 0.000 0.000 10.236


<r2> (average value of r2) Å2
<r2> 83.545
(<r2>)1/2 9.140