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

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-550.197377
Energy at 298.15K-550.204306
Nuclear repulsion energy214.717259
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 CISD/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 3289 3073 11.68      
2 A1 3146 2940 0.40      
3 A1 1767 1651 2.16      
4 A1 1604 1499 7.89      
5 A1 1367 1277 0.74      
6 A1 1231 1150 0.83      
7 A1 952 890 0.19      
8 A1 737 688 3.21      
9 A1 550 514 0.12      
10 A2 3185 2976 0.00      
11 A2 1248 1166 0.00      
12 A2 1049 980 0.00      
13 A2 1004 938 0.00      
14 A2 394 368 0.00      
15 B1 3187 2978 17.03      
16 B1 1231 1150 9.23      
17 B1 974 910 1.06      
18 B1 734 686 59.29      
19 B1 95 89 4.38      
20 B2 3259 3045 1.73      
21 B2 3145 2939 43.31      
22 B2 1603 1498 0.11      
23 B2 1442 1348 5.37      
24 B2 1340 1253 3.57      
25 B2 981 917 7.38      
26 B2 866 809 0.45      
27 B2 662 618 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 20519.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 19173.7 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 CISD/3-21G*
ABC
0.21964 0.15675 0.09473

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.257
C2 0.000 1.355 0.005
C3 0.000 -1.355 0.005
C4 0.000 0.664 -1.351
C5 0.000 -0.664 -1.351
H6 -0.887 1.975 0.133
H7 0.887 1.975 0.133
H8 0.887 -1.975 0.133
H9 -0.887 -1.975 0.133
H10 0.000 1.266 -2.248
H11 0.000 -1.266 -2.248

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.84441.84442.69052.69052.43972.43972.43972.43973.72683.7268
C21.84442.70951.52192.43151.09041.09043.44883.44882.25543.4564
C31.84442.70952.43151.52193.44883.44881.09041.09043.45642.2554
C42.69051.52192.43151.32712.17032.17033.15493.15491.08112.1281
C52.69052.43151.52191.32713.15493.15492.17032.17032.12811.0811
H62.43971.09043.44882.17033.15491.77464.33123.95092.63874.1190
H72.43971.09043.44882.17033.15491.77463.95094.33122.63874.1190
H82.43973.44881.09043.15492.17034.33123.95091.77464.11902.6387
H92.43973.44881.09043.15492.17033.95094.33121.77464.11902.6387
H103.72682.25543.45641.08112.12812.63872.63874.11904.11902.5320
H113.72683.45642.25542.12811.08114.11904.11902.63872.63872.5320

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 105.721 S1 C2 H6 109.785
S1 C2 H7 109.785 S1 C3 C5 105.721
S1 C3 H8 109.785 S1 C3 H9 109.785
C2 S1 C3 94.536 C2 C4 C5 117.011
C2 C4 H10 119.124 C3 C5 C4 117.011
C3 C5 H11 119.124 C4 C2 H6 111.289
C4 C2 H7 111.289 C4 C5 H11 123.865
C5 C3 H8 111.289 C5 C3 H9 111.289
C5 C4 H10 123.865 H6 C2 H7 108.928
H8 C3 H9 108.928
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability