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

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-552.823290
Energy at 298.15K-552.830043
HF Energy-552.358581
Nuclear repulsion energy209.844428
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/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 3178 3063 21.69      
2 A1 3061 2949 0.01      
3 A1 1697 1635 3.78      
4 A1 1541 1485 7.29      
5 A1 1314 1266 0.42      
6 A1 1188 1145 0.47      
7 A1 955 920 0.33      
8 A1 665 641 2.67      
9 A1 500 481 0.00      
10 A2 3110 2996 0.00      
11 A2 1165 1122 0.00      
12 A2 989 953 0.00      
13 A2 949 915 0.00      
14 A2 382 369 0.00      
15 B1 3112 2998 24.72      
16 B1 1156 1114 10.82      
17 B1 931 897 0.20      
18 B1 699 674 49.83      
19 B1 110 106 5.20      
20 B2 3150 3035 4.51      
21 B2 3060 2949 52.54      
22 B2 1539 1483 0.01      
23 B2 1404 1353 5.45      
24 B2 1286 1240 8.77      
25 B2 994 958 4.88      
26 B2 822 793 1.11      
27 B2 594 573 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 19774.8 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 19055.0 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 QCISD/6-31G
ABC
0.20943 0.14924 0.09017

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.304
C2 0.000 1.395 -0.028
C3 0.000 -1.395 -0.028
C4 0.000 0.676 -1.368
C5 0.000 -0.676 -1.368
H6 -0.897 2.014 0.115
H7 0.897 2.014 0.115
H8 0.897 -2.014 0.115
H9 -0.897 -2.014 0.115
H10 0.000 1.274 -2.284
H11 0.000 -1.274 -2.284

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.92891.92892.75662.75662.50502.50502.50502.50503.80733.8073
C21.92892.78911.52052.46591.09941.09943.52753.52752.25853.4936
C31.92892.78912.46591.52053.52753.52751.09941.09943.49362.2585
C42.75661.52052.46591.35132.18992.18993.19983.19981.09342.1535
C52.75662.46591.52051.35133.19983.19982.18992.18992.15351.0934
H62.50501.09943.52752.18993.19981.79374.40944.02802.66584.1673
H72.50501.09943.52752.18993.19981.79374.02804.40942.66584.1673
H82.50503.52751.09943.19982.18994.40944.02801.79374.16732.6658
H92.50503.52751.09943.19982.18994.02804.40941.79374.16732.6658
H103.80732.25853.49361.09342.15352.66582.66584.16734.16732.5471
H113.80733.49362.25852.15351.09344.16734.16732.66582.66582.5471

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 105.484 S1 C2 H6 108.496
S1 C2 H7 108.496 S1 C3 C5 105.484
S1 C3 H8 108.496 S1 C3 H9 108.496
C2 S1 C3 92.599 C2 C4 C5 118.216
C2 C4 H10 118.634 C3 C5 C4 118.216
C3 C5 H11 118.634 C4 C2 H6 112.417
C4 C2 H7 112.417 C4 C5 H11 123.150
C5 C3 H8 112.417 C5 C3 H9 112.417
C5 C4 H10 123.150 H6 C2 H7 109.328
H8 C3 H9 109.328
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability