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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-554.098836
Energy at 298.15K-554.105611
Nuclear repulsion energy215.583394
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 B3PW91/6-31G*
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 3219 3080 19.05      
2 A1 3058 2925 0.18      
3 A1 1735 1660 6.64      
4 A1 1512 1447 7.20      
5 A1 1311 1254 0.35      
6 A1 1151 1101 0.41      
7 A1 976 933 0.08      
8 A1 727 695 2.84      
9 A1 519 497 0.02      
10 A2 3094 2960 0.00      
11 A2 1160 1110 0.00      
12 A2 979 937 0.00      
13 A2 955 914 0.00      
14 A2 377 361 0.00      
15 B1 3096 2962 22.35      
16 B1 1145 1096 10.09      
17 B1 917 878 0.04      
18 B1 685 655 46.82      
19 B1 102 98 4.96      
20 B2 3196 3057 4.17      
21 B2 3058 2926 70.60      
22 B2 1508 1443 0.05      
23 B2 1376 1316 1.95      
24 B2 1271 1216 7.25      
25 B2 989 946 7.97      
26 B2 828 792 0.50      
27 B2 651 623 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 19798.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18940.7 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 B3PW91/6-31G*
ABC
0.22052 0.15906 0.09572

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.250
C2 0.000 1.348 -0.001
C3 0.000 -1.348 -0.001
C4 0.000 0.666 -1.336
C5 0.000 -0.666 -1.336
H6 -0.885 1.983 0.133
H7 0.885 1.983 0.133
H8 0.885 -1.983 0.133
H9 -0.885 -1.983 0.133
H10 0.000 1.264 -2.244
H11 0.000 -1.264 -2.244

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.83851.83852.67012.67012.44172.44172.44172.44173.71593.7159
C21.83852.69521.49932.41581.09731.09733.44843.44842.24523.4432
C31.83852.69522.41581.49933.44843.44841.09731.09733.44322.2452
C42.67011.49932.41581.33142.16202.16203.15493.15491.08782.1329
C52.67012.41581.49931.33143.15493.15492.16202.16202.13291.0878
H62.44171.09733.44842.16203.15491.76974.34233.96542.63624.1201
H72.44171.09733.44842.16203.15491.76973.96544.34232.63624.1201
H82.44173.44841.09733.15492.16204.34233.96541.76974.12012.6362
H92.44173.44841.09733.15492.16203.96544.34231.76974.12012.6362
H103.71592.24523.44321.08782.13292.63622.63624.12014.12012.5282
H113.71593.44322.24522.13291.08784.12014.12012.63622.63622.5282

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 105.806 S1 C2 H6 109.973
S1 C2 H7 109.973 S1 C3 C5 105.806
S1 C3 H8 109.973 S1 C3 H9 109.973
C2 S1 C3 94.280 C2 C4 C5 117.054
C2 C4 H10 119.571 C3 C5 C4 117.054
C3 C5 H11 119.571 C4 C2 H6 111.806
C4 C2 H7 111.806 C4 C5 H11 123.375
C5 C3 H8 111.806 C5 C3 H9 111.806
C5 C4 H10 123.375 H6 C2 H7 107.490
H8 C3 H9 107.490
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.104     -0.312
2 C -0.517     0.101
3 C -0.517     0.101
4 C -0.121     -0.219
5 C -0.121     -0.219
6 H 0.207     0.064
7 H 0.207     0.065
8 H 0.207     0.065
9 H 0.207     0.064
10 H 0.173     0.145
11 H 0.173     0.145


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.019 2.019
CHELPG        
AIM        
ESP 0.014 0.000 -2.018 2.018


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.289 0.000 0.000
y 0.000 -32.003 0.000
z 0.000 0.000 -38.657
Traceless
 xyz
x -3.959 0.000 0.000
y 0.000 6.970 0.000
z 0.000 0.000 -3.011
Polar
3z2-r2-6.022
x2-y2-7.286
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 128.608
(<r2>)1/2 11.341