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All results from a given calculation for C4H6S (Thiophene, 2,5-dihydro-)

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-35.355210
Energy at 298.15K-35.362216
Nuclear repulsion energy86.197888
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 3394 3048 34.89      
2 A1 3254 2922 0.02      
3 A1 1866 1675 12.01      
4 A1 1632 1465 3.96      
5 A1 1432 1286 5.40      
6 A1 1220 1096 0.45      
7 A1 1021 916 0.30      
8 A1 783 703 4.45      
9 A1 551 494 0.03      
10 A2 3300 2963 0.00      
11 A2 1249 1121 0.00      
12 A2 1071 962 0.00      
13 A2 1025 920 0.00      
14 A2 386 347 0.00      
15 B1 3302 2965 70.63      
16 B1 1238 1111 19.56      
17 B1 994 893 4.65      
18 B1 750 674 60.16      
19 B1 101 90 5.34      
20 B2 3361 3018 11.86      
21 B2 3254 2922 129.56      
22 B2 1626 1460 0.72      
23 B2 1476 1326 1.14      
24 B2 1385 1243 12.16      
25 B2 1043 936 8.13      
26 B2 885 794 2.63      
27 B2 704 632 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 21149.4 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 18992.2 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/CEP-31G*
ABC
0.21876 0.15814 0.09503

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 1.249
C2 0.000 1.356 0.009
C3 0.000 -1.356 0.009
C4 0.000 0.671 -1.346
C5 0.000 -0.671 -1.346
H6 -0.882 1.980 0.140
H7 0.882 1.980 0.140
H8 0.882 -1.980 0.140
H9 -0.882 -1.980 0.140
H10 0.000 1.264 -2.250
H11 0.000 -1.264 -2.250

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.83711.83712.68022.68022.43462.43462.43462.43463.72043.7204
C21.83712.71101.51802.43761.08871.08873.45273.45272.26113.4589
C31.83712.71102.43761.51803.45273.45271.08871.08873.45892.2611
C42.68021.51802.43761.34192.16822.16823.16473.16471.08132.1356
C52.68022.43761.51801.34193.16473.16472.16822.16822.13561.0813
H62.43461.08873.45272.16823.16471.76414.33523.96012.64714.1250
H72.43461.08873.45272.16823.16471.76413.96014.33522.64714.1250
H82.43463.45271.08873.16472.16824.33523.96011.76414.12502.6471
H92.43463.45271.08873.16472.16823.96014.33521.76414.12502.6471
H103.72042.26113.45891.08132.13562.64712.64714.12504.12502.5274
H113.72043.45892.26112.13561.08134.12504.12502.64712.64712.5274

picture of Thiophene, 2,5-dihydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C4 105.646 S1 C2 H6 109.978
S1 C2 H7 109.978 S1 C3 C5 105.646
S1 C3 H8 109.978 S1 C3 H9 109.978
C2 S1 C3 95.095 C2 C4 C5 116.806
C2 C4 H10 119.952 C3 C5 C4 116.806
C3 C5 H11 119.952 C4 C2 H6 111.503
C4 C2 H7 111.503 C4 C5 H11 123.242
C5 C3 H8 111.503 C5 C3 H9 111.503
C5 C4 H10 123.242 H6 C2 H7 108.223
H8 C3 H9 108.223
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 -0.115      
2 C -0.206      
3 C -0.206      
4 C -0.263      
5 C -0.263      
6 H 0.135      
7 H 0.135      
8 H 0.135      
9 H 0.135      
10 H 0.258      
11 H 0.258      


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 -2.084 2.084
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.446 0.000 0.000
y 0.000 -31.517 0.000
z 0.000 0.000 -39.078
Traceless
 xyz
x -4.149 0.000 0.000
y 0.000 7.745 0.000
z 0.000 0.000 -3.596
Polar
3z2-r2-7.192
x2-y2-7.929
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.180 0.000 0.000
y 0.000 8.419 0.000
z 0.000 0.000 4.680


<r2> (average value of r2) Å2
<r2> 97.257
(<r2>)1/2 9.862