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: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-554.160485
Energy at 298.15K-554.167244
Nuclear repulsion energy216.350674
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 B1B95/6-31G**
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 3227 3081 16.60      
2 A1 3062 2924 0.24      
3 A1 1741 1662 6.98      
4 A1 1493 1426 6.88      
5 A1 1300 1241 0.34      
6 A1 1142 1091 0.46      
7 A1 978 934 0.04      
8 A1 728 695 2.81      
9 A1 516 493 0.02      
10 A2 3103 2963 0.00      
11 A2 1151 1099 0.00      
12 A2 976 932 0.00      
13 A2 953 910 0.00      
14 A2 375 358 0.00      
15 B1 3105 2965 19.90      
16 B1 1135 1084 9.96      
17 B1 908 867 0.16      
18 B1 684 653 42.71      
19 B1 92 87 4.85      
20 B2 3203 3058 2.88      
21 B2 3063 2924 65.12      
22 B2 1489 1422 0.03      
23 B2 1367 1305 1.56      
24 B2 1259 1202 7.20      
25 B2 987 942 8.05      
26 B2 822 785 0.56      
27 B2 652 623 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 19755.1 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 18862.1 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 B1B95/6-31G**
ABC
0.22199 0.16031 0.09644

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 1.244
C2 0.000 1.343 0.001
C3 0.000 -1.343 0.001
C4 0.000 0.664 -1.331
C5 0.000 -0.664 -1.331
H6 -0.883 1.976 0.134
H7 0.883 1.976 0.134
H8 0.883 -1.976 0.134
H9 -0.883 -1.976 0.134
H10 0.000 1.260 -2.238
H11 0.000 -1.260 -2.238

Atom - Atom Distances (Å)
  S1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
S11.83001.83002.65962.65962.43232.43232.43232.43233.70343.7034
C21.83002.68551.49482.40871.09451.09453.43643.43642.24043.4335
C31.83002.68552.40871.49483.43643.43641.09451.09453.43352.2404
C42.65961.49482.40871.32842.15532.15533.14553.14551.08542.1276
C52.65962.40871.49481.32843.14553.14552.15532.15532.12761.0854
H62.43231.09453.43642.15533.14551.76594.32803.95132.63004.1082
H72.43231.09453.43642.15533.14551.76593.95134.32802.63004.1082
H82.43233.43641.09453.14552.15534.32803.95131.76594.10822.6300
H92.43233.43641.09453.14552.15533.95134.32801.76594.10822.6300
H103.70342.24043.43351.08542.12762.63002.63004.10824.10822.5208
H113.70343.43352.24042.12761.08544.10824.10822.63002.63002.5208

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 105.804 S1 C2 H6 109.984
S1 C2 H7 109.984 S1 C3 C5 105.804
S1 C3 H8 109.984 S1 C3 H9 109.984
C2 S1 C3 94.398 C2 C4 C5 116.997
C2 C4 H10 119.686 C3 C5 C4 116.997
C3 C5 H11 119.686 C4 C2 H6 111.762
C4 C2 H7 111.762 C4 C5 H11 123.317
C5 C3 H8 111.762 C5 C3 H9 111.762
C5 C4 H10 123.317 H6 C2 H7 107.556
H8 C3 H9 107.556
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.101      
2 C -0.419      
3 C -0.419      
4 C -0.079      
5 C -0.079      
6 H 0.163      
7 H 0.163      
8 H 0.163      
9 H 0.163      
10 H 0.123      
11 H 0.123      


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 -1.963 1.963
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.176 0.000 0.000
y 0.000 -32.100 0.000
z 0.000 0.000 -38.605
Traceless
 xyz
x -3.823 0.000 0.000
y 0.000 6.790 0.000
z 0.000 0.000 -2.967
Polar
3z2-r2-5.934
x2-y2-7.075
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.229 0.000 0.000
y 0.000 9.952 0.000
z 0.000 0.000 8.539


<r2> (average value of r2) Å2
<r2> 127.835
(<r2>)1/2 11.306