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

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-554.179627
Energy at 298.15K-554.186436
Nuclear repulsion energy216.082584
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 mPW1PW91/6-31G**
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 3238 3081 15.40      
2 A1 3074 2925 0.26      
3 A1 1747 1662 6.58      
4 A1 1502 1429 7.04      
5 A1 1310 1246 0.19      
6 A1 1151 1095 0.45      
7 A1 981 933 0.09      
8 A1 736 700 2.80      
9 A1 523 498 0.02      
10 A2 3116 2965 0.00      
11 A2 1160 1104 0.00      
12 A2 983 935 0.00      
13 A2 959 913 0.00      
14 A2 380 362 0.00      
15 B1 3118 2967 18.73      
16 B1 1144 1089 10.14      
17 B1 916 872 0.20      
18 B1 689 655 45.70      
19 B1 100 96 5.05      
20 B2 3214 3059 2.69      
21 B2 3074 2925 64.64      
22 B2 1498 1425 0.00      
23 B2 1377 1311 1.88      
24 B2 1270 1208 6.96      
25 B2 993 945 8.48      
26 B2 833 793 0.58      
27 B2 659 627 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 19871.9 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 18908.1 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 mPW1PW91/6-31G**
ABC
0.22154 0.15981 0.09617

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.246
C2 0.000 1.345 0.000
C3 0.000 -1.345 0.000
C4 0.000 0.665 -1.333
C5 0.000 -0.665 -1.333
H6 -0.883 1.977 0.133
H7 0.883 1.977 0.133
H8 0.883 -1.977 0.133
H9 -0.883 -1.977 0.133
H10 0.000 1.261 -2.240
H11 0.000 -1.261 -2.240

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.83311.83312.66382.66382.43482.43482.43482.43483.70763.7076
C21.83312.68901.49702.41141.09481.09483.43983.43982.24223.4363
C31.83312.68902.41141.49703.43983.43981.09481.09483.43632.2422
C42.66381.49702.41141.32902.15752.15753.14813.14811.08552.1283
C52.66382.41141.49701.32903.14813.14812.15752.15752.12831.0855
H62.43481.09483.43982.15753.14811.76684.33123.95442.63224.1110
H72.43481.09483.43982.15753.14811.76683.95444.33122.63224.1110
H82.43483.43981.09483.14812.15754.33123.95441.76684.11102.6322
H92.43483.43981.09483.14812.15753.95444.33121.76684.11102.6322
H103.70762.24223.43631.08552.12832.63222.63224.11104.11102.5217
H113.70763.43632.24222.12831.08554.11104.11102.63222.63222.5217

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 105.806 S1 C2 H6 109.951
S1 C2 H7 109.951 S1 C3 C5 105.806
S1 C3 H8 109.951 S1 C3 H9 109.951
C2 S1 C3 94.354 C2 C4 C5 117.017
C2 C4 H10 119.660 C3 C5 C4 117.017
C3 C5 H11 119.660 C4 C2 H6 111.771
C4 C2 H7 111.771 C4 C5 H11 123.324
C5 C3 H8 111.771 C5 C3 H9 111.771
C5 C4 H10 123.324 H6 C2 H7 107.600
H8 C3 H9 107.600
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.104      
2 C -0.442      
3 C -0.442      
4 C -0.092      
5 C -0.092      
6 H 0.173      
7 H 0.173      
8 H 0.173      
9 H 0.173      
10 H 0.137      
11 H 0.137      


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 -2.006 2.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.274 0.000 0.000
y 0.000 -32.010 0.000
z 0.000 0.000 -38.669
Traceless
 xyz
x -3.935 0.000 0.000
y 0.000 6.962 0.000
z 0.000 0.000 -3.027
Polar
3z2-r2-6.054
x2-y2-7.264
xy0.000
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 128.117
(<r2>)1/2 11.319