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/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-40.737422
Energy at 298.15K-40.743970
Nuclear repulsion energy107.119384
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/CEP-121G
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 3421 3122 4.69      
2 A 3372 3077 11.58      
3 A 3353 3060 15.54      
4 A 3252 2967 28.02      
5 A 3155 2879 49.05      
6 A 1738 1586 5.63      
7 A 1645 1501 10.63      
8 A 1631 1488 19.14      
9 A 1564 1427 0.47      
10 A 1471 1343 0.64      
11 A 1375 1255 22.85      
12 A 1259 1149 17.15      
13 A 1202 1097 1.08      
14 A 1129 1030 1.00      
15 A 1072 978 2.68      
16 A 895 816 13.53      
17 A 758 692 3.39      
18 A 669 610 6.14      
19 A 577 526 1.13      
20 A 320 292 1.19      
21 A 3236 2953 31.49      
22 A 1621 1479 11.28      
23 A 1183 1080 0.68      
24 A 1071 977 0.60      
25 A 976 891 15.57      
26 A 807 736 122.47      
27 A 610 556 0.06      
28 A 497 454 4.79      
29 A 244 222 5.73      
30 A 136 124 0.47      

Unscaled Zero Point Vibrational Energy (zpe) 22118.6 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 20183.2 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/CEP-121G
ABC
0.16888 0.10061 0.06379

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.749 -2.151 0.000
C2 -0.942 -1.443 0.000
H3 -2.121 0.453 0.000
C4 -1.147 0.001 0.000
C5 0.000 0.728 0.000
H6 0.790 -2.783 0.000
C7 0.364 -1.802 0.000
S8 1.440 -0.365 0.000
H9 -0.798 2.709 0.000
H10 0.719 2.562 0.878
H11 0.719 2.562 -0.878
C12 0.174 2.227 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.07312.63052.23393.36802.61582.14163.65494.95175.39135.39134.7813
C21.07312.23301.45832.36642.18961.35482.61484.15434.42344.42343.8358
H32.63052.23301.07372.13884.35293.35633.65432.61523.64443.64442.9008
C42.23391.45831.07371.35853.39172.35292.61362.73063.28823.28822.5889
C53.36802.36642.13881.35853.59892.55611.80812.13552.15652.15651.5090
H62.61582.18964.35293.39173.59891.06942.50435.71695.41725.41725.0477
C72.14161.35483.35632.35292.55611.06941.79524.65824.46544.46544.0334
S83.65492.61483.65432.61361.80812.50431.79523.80233.13973.13972.8845
H94.95174.15432.61522.73062.13555.71694.65823.80231.75841.75841.0850
H105.39134.42343.64443.28822.15655.41724.46543.13971.75841.75581.0859
H115.39134.42343.64443.28822.15655.41724.46543.13971.75841.75581.0859
C124.78133.83582.90082.58891.50905.04774.03342.88451.08501.08591.0859

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 123.159 H1 C2 C7 123.367
C2 C4 H3 123.031 C2 C4 C5 114.256
C2 C7 H6 128.796 C2 C7 S8 111.453
H3 C4 C5 122.713 C4 C2 C7 113.473
C4 C5 S8 110.451 C4 C5 C12 128.997
C5 S8 C7 90.366 C5 C12 H9 109.740
C5 C12 H10 111.367 C5 C12 H11 111.367
H6 C7 S8 119.751 S8 C5 C12 120.552
H9 C12 H10 108.182 H9 C12 H11 108.182
H10 C12 H11 107.888
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.204      
2 C -0.017      
3 H 0.217      
4 C -0.104      
5 C -0.171      
6 H 0.205      
7 C -0.526      
8 S 0.283      
9 H 0.175      
10 H 0.172      
11 H 0.172      
12 C -0.608      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.296 0.433 0.000 1.366
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.819 0.123 0.000
y 0.123 -36.314 0.000
z 0.000 0.000 -47.289
Traceless
 xyz
x -1.018 0.123 0.000
y 0.123 8.740 0.000
z 0.000 0.000 -7.722
Polar
3z2-r2-15.444
x2-y2-6.505
xy0.123
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 11.528 0.292 0.000
y 0.292 11.477 0.000
z 0.000 0.000 5.576


<r2> (average value of r2) Å2
<r2> 136.741
(<r2>)1/2 11.694