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All results from a given calculation for C4H4S (Thiophene)

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-548.591692
Energy at 298.15K-548.596462
Nuclear repulsion energy203.385312
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/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 3443 3107 3.72      
2 A1 3411 3079 1.59      
3 A1 1554 1403 18.14      
4 A1 1530 1381 2.47      
5 A1 1238 1117 6.26      
6 A1 1088 982 0.88      
7 A1 888 802 39.34      
8 A1 681 614 2.32      
9 A2 1121 1012 0.00      
10 A2 860 777 0.00      
11 A2 645 582 0.00      
12 B1 1090 984 2.35      
13 B1 848 765 178.41      
14 B1 505 455 0.31      
15 B2 3437 3102 0.67      
16 B2 3398 3067 4.71      
17 B2 1707 1540 1.34      
18 B2 1438 1298 6.80      
19 B2 1233 1113 5.38      
20 B2 976 881 1.38      
21 B2 812 733 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 15950.8 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 14397.2 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/3-21G*
ABC
0.26907 0.18199 0.10856

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.190
C2 0.000 1.232 -0.013
C3 0.000 -1.232 -0.013
C4 0.000 0.719 -1.259
C5 0.000 -0.719 -1.259
H6 0.000 2.264 0.258
H7 0.000 -2.264 0.258
H8 0.000 1.312 -2.148
H9 0.000 -1.312 -2.148

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9
S11.72231.72232.55292.55292.44902.44903.58733.5873
C21.72232.46441.34772.31521.06713.50712.13693.3216
C31.72232.46442.31521.34773.50711.06713.32162.1369
C42.55291.34772.31521.43802.16543.34691.06882.2172
C52.55292.31521.34771.43803.34692.16542.21721.0688
H62.44901.06713.50712.16543.34694.52882.58774.3105
H72.44903.50711.06713.34692.16544.52884.31052.5877
H83.58732.13693.32161.06882.21722.58774.31052.6240
H93.58733.32162.13692.21721.06884.31052.58772.6240

picture of Thiophene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 111.940 S1 C2 H6 120.987
S1 C3 C5 111.940 S1 C3 H7 120.987
C2 S1 C3 91.358 C2 C4 C5 112.381
C2 C4 H8 123.922 C3 C5 C4 112.381
C3 C5 H9 123.922 C4 C2 H6 127.073
C4 C5 H9 123.697 C5 C3 H7 127.073
C5 C4 H8 123.697
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.412 0.035    
2 C -0.474 -0.259    
3 C -0.474 -0.259    
4 C -0.246 -0.097    
5 C -0.246 -0.097    
6 H 0.266 0.213    
7 H 0.266 0.213    
8 H 0.248 0.126    
9 H 0.248 0.126    


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 -0.763 0.763
CHELPG 0.000 0.000 -0.676 0.676
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 2.696 0.000 0.000
y 0.000 7.923 0.000
z 0.000 0.000 9.134


<r2> (average value of r2) Å2
<r2> 111.594
(<r2>)1/2 10.564