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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-550.108321
Energy at 298.15K-550.115057
HF Energy-549.643838
Nuclear repulsion energy209.799401
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 QCISD/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 3182 3084 12.39      
2 A1 3077 2983 0.12      
3 A1 1683 1631 2.09      
4 A1 1547 1499 8.63      
5 A1 1301 1261 0.03      
6 A1 1198 1161 0.64      
7 A1 919 891 0.51      
8 A1 661 641 3.03      
9 A1 500 485 0.00      
10 A2 3127 3031 0.00      
11 A2 1190 1154 0.00      
12 A2 981 951 0.00      
13 A2 943 914 0.00      
14 A2 377 366 0.00      
15 B1 3129 3032 15.79      
16 B1 1180 1144 7.87      
17 B1 901 873 0.95      
18 B1 700 679 53.41      
19 B1 110 107 4.58      
20 B2 3154 3057 2.12      
21 B2 3077 2982 33.58      
22 B2 1547 1500 0.11      
23 B2 1406 1363 6.53      
24 B2 1271 1232 7.09      
25 B2 957 928 6.09      
26 B2 825 800 1.13      
27 B2 589 570 0.98      

Unscaled Zero Point Vibrational Energy (zpe) 19766.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 19158.1 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 QCISD/3-21G
ABC
0.20992 0.14858 0.09002

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.308
C2 0.000 1.396 -0.030
C3 0.000 -1.396 -0.030
C4 0.000 0.671 -1.371
C5 0.000 -0.671 -1.371
H6 -0.898 2.008 0.109
H7 0.898 2.008 0.109
H8 0.898 -2.008 0.109
H9 -0.898 -2.008 0.109
H10 0.000 1.266 -2.283
H11 0.000 -1.266 -2.283

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.93361.93362.76182.76182.50512.50512.50512.50513.80803.8080
C21.93362.79201.52472.46381.09551.09553.52293.52292.25713.4880
C31.93362.79202.46381.52473.52293.52291.09551.09553.48802.2571
C42.76181.52472.46381.34152.18722.18723.18923.18921.08942.1412
C52.76182.46381.52471.34153.18923.18922.18722.18722.14121.0894
H62.50511.09553.52292.18723.18921.79634.39884.01532.66044.1531
H72.50511.09553.52292.18723.18921.79634.01534.39882.66044.1531
H82.50513.52291.09553.18922.18724.39884.01531.79634.15312.6604
H92.50513.52291.09553.18922.18724.01534.39881.79634.15312.6604
H103.80802.25713.48801.08942.14122.66042.66044.15314.15312.5329
H113.80803.48802.25712.14121.08944.15314.15312.66042.66042.5329

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 105.380 S1 C2 H6 108.393
S1 C2 H7 108.393 S1 C3 C5 105.380
S1 C3 H8 108.393 S1 C3 H9 108.393
C2 S1 C3 92.436 C2 C4 C5 118.402
C2 C4 H10 118.452 C3 C5 C4 118.402
C3 C5 H11 118.452 C4 C2 H6 112.143
C4 C2 H7 112.143 C4 C5 H11 123.147
C5 C3 H8 112.143 C5 C3 H9 112.143
C5 C4 H10 123.147 H6 C2 H7 110.148
H8 C3 H9 110.148
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability