return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-552.773944
Energy at 298.15K-552.780730
HF Energy-552.359548
Nuclear repulsion energy210.454742
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 MP2/6-31G
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 3225 3085 19.19      
2 A1 3104 2970 0.02      
3 A1 1683 1611 3.69      
4 A1 1559 1492 7.26      
5 A1 1326 1269 0.19      
6 A1 1196 1145 0.48      
7 A1 965 923 0.34      
8 A1 679 649 2.63      
9 A1 504 482 0.00      
10 A2 3159 3023 0.00      
11 A2 1174 1123 0.00      
12 A2 1001 957 0.00      
13 A2 953 911 0.00      
14 A2 384 367 0.00      
15 B1 3161 3025 21.77      
16 B1 1167 1117 11.45      
17 B1 940 899 0.03      
18 B1 702 671 53.71      
19 B1 108 103 5.38      
20 B2 3196 3058 4.01      
21 B2 3104 2970 48.15      
22 B2 1559 1491 0.01      
23 B2 1409 1348 5.85      
24 B2 1298 1242 6.69      
25 B2 1004 961 5.37      
26 B2 827 792 1.03      
27 B2 605 579 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 19996.0 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 19132.2 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 MP2/6-31G
ABC
0.21047 0.15026 0.09071

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.299
C2 0.000 1.390 -0.027
C3 0.000 -1.390 -0.027
C4 0.000 0.676 -1.364
C5 0.000 -0.676 -1.364
H6 -0.894 2.008 0.116
H7 0.894 2.008 0.116
H8 0.894 -2.008 0.116
H9 -0.894 -2.008 0.116
H10 0.000 1.270 -2.278
H11 0.000 -1.270 -2.278

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.92171.92172.74762.74762.49682.49682.49682.49683.79623.7962
C21.92172.78081.51562.46091.09651.09653.51743.51742.25423.4847
C31.92172.78082.46091.51563.51743.51741.09651.09653.48472.2542
C42.74761.51562.46091.35172.18292.18293.19303.19301.09032.1498
C52.74762.46091.51561.35173.19303.19302.18292.18292.14981.0903
H62.49681.09653.51742.18293.19301.78864.39714.01692.66034.1567
H72.49681.09653.51742.18293.19301.78864.01694.39712.66034.1567
H82.49683.51741.09653.19302.18294.39714.01691.78864.15672.6603
H92.49683.51741.09653.19302.18294.01694.39711.78864.15672.6603
H103.79622.25423.48471.09032.14982.66032.66034.15674.15672.5395
H113.79623.48472.25422.14981.09034.15674.15672.66032.66032.5395

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 105.528 S1 C2 H6 108.524
S1 C2 H7 108.524 S1 C3 C5 105.528
S1 C3 H8 108.524 S1 C3 H9 108.524
C2 S1 C3 92.691 C2 C4 C5 118.127
C2 C4 H10 118.866 C3 C5 C4 118.127
C3 C5 H11 118.866 C4 C2 H6 112.387
C4 C2 H7 112.387 C4 C5 H11 123.007
C5 C3 H8 112.387 C5 C3 H9 112.387
C5 C4 H10 123.007 H6 C2 H7 109.297
H8 C3 H9 109.297
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability