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 C5H6S (Thiophene, 2-methyl-)

using model chemistry: HF/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G
 hartrees
Energy at 0K-590.215311
Energy at 298.15K-590.221904
Nuclear repulsion energy269.799762
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 HF/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 A 3471 3134 2.26      
2 A 3407 3076 8.07      
3 A 3389 3060 12.08      
4 A 3273 2955 18.58      
5 A 3192 2882 33.91      
6 A 1791 1617 5.22      
7 A 1691 1527 13.36      
8 A 1649 1488 11.66      
9 A 1590 1436 0.78      
10 A 1502 1356 0.49      
11 A 1410 1273 18.43      
12 A 1277 1153 17.06      
13 A 1226 1107 1.15      
14 A 1148 1037 0.66      
15 A 1094 987 1.29      
16 A 908 819 12.19      
17 A 759 685 4.72      
18 A 673 608 7.32      
19 A 587 530 1.16      
20 A 328 297 1.29      
21 A 3254 2938 20.55      
22 A 1637 1478 10.93      
23 A 1203 1086 2.15      
24 A 1113 1005 0.78      
25 A 1003 906 7.66      
26 A 836 754 110.01      
27 A 633 571 0.02      
28 A 516 466 4.90      
29 A 251 227 4.93      
30 A 134 121 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 22470.9 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 20289.0 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 HF/6-31G
ABC
0.17031 0.10201 0.06455

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -2.426 -1.468 0.000
C2 -1.463 -1.000 0.000
H3 -2.103 1.123 0.000
C4 -1.283 0.433 0.000
C5 0.000 0.835 0.000
H6 -0.168 -2.745 0.000
C7 -0.313 -1.689 0.000
S8 1.106 -0.593 0.000
H9 -0.264 2.941 0.000
H10 1.160 2.411 0.875
H11 1.160 2.411 -0.875
C12 0.548 2.224 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.07102.61152.21873.34532.59462.12533.63954.91105.35485.35484.7416
C21.07102.21771.44472.34682.17291.34052.60134.11974.39104.39103.8004
H32.61152.21771.07172.12234.32513.33313.63882.58573.61503.61502.8704
C42.21871.44471.07171.34413.36802.33282.59992.70703.26253.26252.5613
C53.34532.34682.12231.34413.58362.54251.80602.12272.14372.14371.4938
H62.59462.17294.32513.36803.58361.06642.50095.68685.39545.39545.0205
C72.12531.34053.33312.33282.54251.06641.79264.62974.44284.44284.0063
S83.63952.60133.63882.59991.80602.50091.79263.79013.12903.12902.8718
H94.91104.11972.58572.70702.12275.68684.62973.79011.75331.75331.0830
H105.35484.39103.61503.26252.14375.39544.44283.12901.75331.75081.0841
H115.35484.39103.61503.26252.14375.39544.44283.12901.75331.75081.0841
C124.74163.80042.87042.56131.49385.02054.00632.87181.08301.08411.0841

picture of Thiophene, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 123.070 H1 C2 C7 123.212
C2 C4 H3 122.917 C2 C4 C5 114.557
C2 C7 H6 128.698 C2 C7 S8 111.436
H3 C4 C5 122.525 C4 C2 C7 113.718
C4 C5 S8 110.385 C4 C5 C12 128.919
C5 S8 C7 89.903 C5 C12 H9 109.908
C5 C12 H10 111.536 C5 C12 H11 111.536
H6 C7 S8 119.866 S8 C5 C12 120.696
H9 C12 H10 108.011 H9 C12 H11 108.011
H10 C12 H11 107.697
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.212 0.117    
2 C -0.111 -0.105    
3 H 0.208 0.134    
4 C -0.124 -0.149    
5 C -0.375 0.031    
6 H 0.224 0.195    
7 C -0.551 -0.190    
8 S 0.447 -0.119    
9 H 0.178 0.022    
10 H 0.184 0.053    
11 H 0.184 0.053    
12 C -0.476 -0.041    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.210 0.694 0.000 1.395
CHELPG -1.113 0.622 0.000 1.275
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.355 1.474 0.000
y 1.474 -37.101 0.000
z 0.000 0.000 -47.530
Traceless
 xyz
x -0.039 1.474 0.000
y 1.474 7.841 0.000
z 0.000 0.000 -7.802
Polar
3z2-r2-15.603
x2-y2-5.254
xy1.474
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.874 0.256 0.000
y 0.256 10.706 0.000
z 0.000 0.000 4.494


<r2> (average value of r2) Å2
<r2> 180.697
(<r2>)1/2 13.442