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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-550.281033
Energy at 298.15K-550.287803
HF Energy-549.748384
Nuclear repulsion energy213.217345
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 3188 3064 12.84      
2 A1 3051 2932 0.24      
3 A1 1683 1617 1.57      
4 A1 1563 1502 7.66      
5 A1 1320 1269 0.48      
6 A1 1194 1148 0.67      
7 A1 918 883 0.17      
8 A1 705 678 2.47      
9 A1 530 510 0.12      
10 A2 3089 2969 0.00      
11 A2 1207 1160 0.00      
12 A2 1001 962 0.00      
13 A2 956 919 0.00      
14 A2 373 358 0.00      
15 B1 3091 2971 19.66      
16 B1 1192 1145 7.76      
17 B1 946 909 0.42      
18 B1 699 672 53.41      
19 B1 88 84 4.06      
20 B2 3160 3037 2.28      
21 B2 3051 2932 43.78      
22 B2 1563 1503 0.01      
23 B2 1399 1344 5.53      
24 B2 1296 1246 4.05      
25 B2 948 911 5.79      
26 B2 835 803 0.36      
27 B2 633 609 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 19839.8 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 19068.1 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
0.21647 0.15466 0.09343

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 1.265
C2 0.000 1.364 0.005
C3 0.000 -1.364 0.005
C4 0.000 0.670 -1.360
C5 0.000 -0.670 -1.360
H6 -0.894 1.988 0.135
H7 0.894 1.988 0.135
H8 0.894 -1.988 0.135
H9 -0.894 -1.988 0.135
H10 0.000 1.278 -2.263
H11 0.000 -1.278 -2.263

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.85671.85672.70932.70932.45502.45502.45502.45503.75283.7528
C21.85672.72771.53112.44991.09801.09803.47123.47122.27013.4824
C31.85672.72772.44991.53113.47123.47121.09801.09803.48242.2701
C42.70931.53112.44991.34092.18402.18403.17813.17811.08882.1480
C52.70932.44991.53111.34093.17813.17812.18402.18402.14801.0888
H62.45501.09803.47122.18403.17811.78824.35913.97542.65624.1496
H72.45501.09803.47122.18403.17811.78823.97544.35912.65624.1496
H82.45503.47121.09803.17812.18404.35913.97541.78824.14962.6562
H92.45503.47121.09803.17812.18403.97544.35911.78824.14962.6562
H103.75282.27013.48241.08882.14802.65622.65624.14964.14962.5566
H113.75283.48242.27012.14801.08884.14964.14962.65622.65622.5566

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 105.803 S1 C2 H6 109.698
S1 C2 H7 109.698 S1 C3 C5 105.803
S1 C3 H8 109.698 S1 C3 H9 109.698
C2 S1 C3 94.538 C2 C4 C5 116.928
C2 C4 H10 119.138 C3 C5 C4 116.928
C3 C5 H11 119.138 C4 C2 H6 111.274
C4 C2 H7 111.274 C4 C5 H11 123.934
C5 C3 H8 111.274 C5 C3 H9 111.274
C5 C4 H10 123.934 H6 C2 H7 109.044
H8 C3 H9 109.044
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability