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

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-36.014688
Energy at 298.15K-36.021362
HF Energy-35.368712
Nuclear repulsion energy86.001082
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/CEP-121G*
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 3222 3070 18.86      
2 A1 3079 2934 0.02      
3 A1 1669 1590 7.15      
4 A1 1529 1456 6.11      
5 A1 1327 1264 0.69      
6 A1 1144 1090 0.13      
7 A1 968 923 0.29      
8 A1 740 705 2.27      
9 A1 519 494 0.05      
10 A2 3135 2987 0.00      
11 A2 1157 1103 0.00      
12 A2 985 939 0.00      
13 A2 909 866 0.00      
14 A2 353 336 0.00      
15 B1 3137 2989 23.34      
16 B1 1144 1090 15.23      
17 B1 928 884 0.95      
18 B1 671 640 60.65      
19 B1 51 48 4.98      
20 B2 3199 3048 3.72      
21 B2 3079 2934 71.03      
22 B2 1524 1452 0.01      
23 B2 1364 1300 2.45      
24 B2 1287 1226 11.78      
25 B2 991 944 5.44      
26 B2 830 790 0.90      
27 B2 664 633 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 19801.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 18867.0 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/CEP-121G*
ABC
0.21792 0.15750 0.09470

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.254
C2 0.000 1.357 0.005
C3 0.000 -1.357 0.005
C4 0.000 0.674 -1.345
C5 0.000 -0.674 -1.345
H6 -0.890 1.984 0.135
H7 0.890 1.984 0.135
H8 0.890 -1.984 0.135
H9 -0.890 -1.984 0.135
H10 0.000 1.269 -2.257
H11 0.000 -1.269 -2.257

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.84391.84392.68472.68472.44502.44502.44502.44503.73303.7330
C21.84392.71311.51282.43801.09631.09633.45903.45902.26343.4655
C31.84392.71312.43801.51283.45903.45901.09631.09633.46552.2634
C42.68471.51282.43801.34732.16742.16743.16903.16901.08902.1461
C52.68472.43801.51281.34733.16903.16902.16742.16742.14611.0890
H62.44501.09633.45902.16743.16901.77964.34803.96712.65004.1343
H72.44501.09633.45902.16743.16901.77963.96714.34802.65004.1343
H82.44503.45901.09633.16902.16744.34803.96711.77964.13432.6500
H92.44503.45901.09633.16902.16743.96714.34801.77964.13432.6500
H103.73302.26343.46551.08902.14612.65002.65004.13434.13432.5382
H113.73303.46552.26342.14611.08904.13434.13432.65002.65002.5382

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 105.801 S1 C2 H6 109.904
S1 C2 H7 109.904 S1 C3 C5 105.801
S1 C3 H8 109.904 S1 C3 H9 109.904
C2 S1 C3 94.730 C2 C4 C5 116.833
C2 C4 H10 120.022 C3 C5 C4 116.833
C3 C5 H11 120.022 C4 C2 H6 111.347
C4 C2 H7 111.347 C4 C5 H11 123.144
C5 C3 H8 111.347 C5 C3 H9 111.347
C5 C4 H10 123.144 H6 C2 H7 108.518
H8 C3 H9 108.518
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability