return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-551.469663
Energy at 298.15K-551.476486
Nuclear repulsion energy215.244052
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 mPW1PW91/3-21G*
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 3247 3083 9.65      
2 A1 3078 2923 0.66      
3 A1 1729 1642 2.61      
4 A1 1536 1459 10.45      
5 A1 1314 1248 1.74      
6 A1 1187 1127 0.73      
7 A1 960 912 0.21      
8 A1 724 688 3.39      
9 A1 537 510 0.14      
10 A2 3118 2961 0.00      
11 A2 1208 1147 0.00      
12 A2 1005 954 0.00      
13 A2 967 918 0.00      
14 A2 379 360 0.00      
15 B1 3121 2963 13.45      
16 B1 1190 1130 8.86      
17 B1 918 871 0.22      
18 B1 707 671 70.76      
19 B1 92 88 4.87      
20 B2 3219 3057 1.07      
21 B2 3078 2923 44.28      
22 B2 1534 1457 1.30      
23 B2 1394 1324 4.47      
24 B2 1287 1222 2.88      
25 B2 980 930 10.20      
26 B2 848 805 0.25      
27 B2 649 617 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 20002.2 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 18994.0 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 mPW1PW91/3-21G*
ABC
0.22057 0.15788 0.09534

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.254
C2 0.000 1.349 0.002
C3 0.000 -1.349 0.002
C4 0.000 0.664 -1.343
C5 0.000 -0.664 -1.343
H6 -0.889 1.975 0.130
H7 0.889 1.975 0.130
H8 0.889 -1.975 0.130
H9 -0.889 -1.975 0.130
H10 0.000 1.266 -2.245
H11 0.000 -1.266 -2.245

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.84011.84012.68062.68062.44072.44072.44072.44073.72053.7205
C21.84012.69731.50912.42111.09551.09553.44343.44342.24823.4471
C31.84012.69732.42111.50913.44343.44341.09551.09553.44712.2482
C42.68061.50912.42111.32882.16312.16313.15103.15101.08382.1304
C52.68062.42111.50911.32883.15103.15102.16312.16312.13041.0838
H62.44071.09553.44342.16313.15101.77864.33283.95092.63294.1151
H72.44071.09553.44342.16313.15101.77863.95094.33282.63294.1151
H82.44073.44341.09553.15102.16314.33283.95091.77864.11512.6329
H92.44073.44341.09553.15102.16313.95094.33281.77864.11512.6329
H103.72052.24823.44711.08382.13042.63292.63294.11514.11512.5315
H113.72053.44712.24822.13041.08384.11514.11512.63292.63292.5315

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 105.908 S1 C2 H6 109.879
S1 C2 H7 109.879 S1 C3 C5 105.908
S1 C3 H8 109.879 S1 C3 H9 109.879
C2 S1 C3 94.260 C2 C4 C5 116.962
C2 C4 H10 119.336 C3 C5 C4 116.962
C3 C5 H11 119.336 C4 C2 H6 111.306
C4 C2 H7 111.306 C4 C5 H11 123.701
C5 C3 H8 111.306 C5 C3 H9 111.306
C5 C4 H10 123.701 H6 C2 H7 108.543
H8 C3 H9 108.543
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.192      
2 C -0.647      
3 C -0.647      
4 C -0.194      
5 C -0.194      
6 H 0.257      
7 H 0.257      
8 H 0.257      
9 H 0.257      
10 H 0.231      
11 H 0.231      


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 -2.017 2.017
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.027 0.000 0.000
y 0.000 -32.197 0.000
z 0.000 0.000 -38.721
Traceless
 xyz
x -4.568 0.000 0.000
y 0.000 7.177 0.000
z 0.000 0.000 -2.609
Polar
3z2-r2-5.219
x2-y2-7.830
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.589 0.000 0.000
y 0.000 9.476 0.000
z 0.000 0.000 7.948


<r2> (average value of r2) Å2
<r2> 129.147
(<r2>)1/2 11.364