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

using model chemistry: MP2/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 MP2/CEP-31G*
 hartrees
Energy at 0K-35.955783
Energy at 298.15K-35.962491
HF Energy-35.353209
Nuclear repulsion energy85.464199
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-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 3233 3069 19.21      
2 A1 3098 2941 0.09      
3 A1 1695 1609 7.29      
4 A1 1520 1443 5.46      
5 A1 1327 1260 1.31      
6 A1 1132 1075 0.12      
7 A1 979 930 0.19      
8 A1 740 703 2.96      
9 A1 516 490 0.11      
10 A2 3162 3002 0.00      
11 A2 1159 1100 0.00      
12 A2 984 935 0.00      
13 A2 924 877 0.00      
14 A2 348 330 0.00      
15 B1 3164 3004 33.20      
16 B1 1147 1089 17.03      
17 B1 930 883 0.62      
18 B1 684 650 74.07      
19 B1 80 76 5.00      
20 B2 3197 3035 3.62      
21 B2 3099 2942 74.26      
22 B2 1514 1438 0.05      
23 B2 1359 1290 1.99      
24 B2 1283 1218 12.00      
25 B2 998 948 6.40      
26 B2 825 783 1.07      
27 B2 662 628 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 19879.6 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 18873.7 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 MP2/CEP-31G*
ABC
0.21506 0.15622 0.09375

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.256
C2 0.000 1.363 0.009
C3 0.000 -1.363 0.009
C4 0.000 0.684 -1.353
C5 0.000 -0.684 -1.353
H6 -0.897 1.994 0.141
H7 0.897 1.994 0.141
H8 0.897 -1.994 0.141
H9 -0.897 -1.994 0.141
H10 0.000 1.285 -2.270
H11 0.000 -1.285 -2.270

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.84741.84742.69712.69712.45412.45412.45412.45413.75323.7532
C21.84742.72531.52142.45801.10491.10493.47683.47682.28033.4934
C31.84742.72532.45801.52143.47683.47681.10491.10493.49342.2803
C42.69711.52142.45801.36772.18022.18023.19483.19481.09682.1721
C52.69712.45801.52141.36773.19483.19482.18022.18022.17211.0968
H62.45411.10493.47682.18023.19481.79424.37263.98752.66894.1678
H72.45411.10493.47682.18023.19481.79423.98754.37262.66894.1678
H82.45413.47681.10493.19482.18024.37263.98751.79424.16782.6689
H92.45413.47681.10493.19482.18023.98754.37261.79424.16782.6689
H103.75322.28033.49341.09682.17212.66892.66894.16784.16782.5700
H113.75323.49342.28032.17211.09684.16784.16782.66892.66892.5700

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 105.973 S1 C2 H6 109.895
S1 C2 H7 109.895 S1 C3 C5 105.973
S1 C3 H8 109.895 S1 C3 H9 109.895
C2 S1 C3 95.056 C2 C4 C5 116.499
C2 C4 H10 120.264 C3 C5 C4 116.499
C3 C5 H11 120.264 C4 C2 H6 111.240
C4 C2 H7 111.240 C4 C5 H11 123.237
C5 C3 H8 111.240 C5 C3 H9 111.240
C5 C4 H10 123.237 H6 C2 H7 108.579
H8 C3 H9 108.579
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability