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: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-591.132361
Energy at 298.15K-591.138463
HF Energy-590.326906
Nuclear repulsion energy272.993159
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 MP2=FULL/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 3306 3115 1.02      
2 A 3268 3079 4.10      
3 A 3251 3063 6.02      
4 A 3199 3014 9.31      
5 A 3102 2923 22.85      
6 A 1606 1513 1.32      
7 A 1557 1467 5.55      
8 A 1512 1425 8.26      
9 A 1473 1388 0.35      
10 A 1423 1340 0.47      
11 A 1294 1220 14.66      
12 A 1232 1161 12.74      
13 A 1132 1067 2.39      
14 A 1102 1039 3.63      
15 A 1022 963 1.68      
16 A 893 842 12.91      
17 A 773 728 0.06      
18 A 694 654 1.96      
19 A 565 532 1.02      
20 A 310 292 0.77      
21 A 3181 2997 11.64      
22 A 1541 1452 8.37      
23 A 1090 1027 0.40      
24 A 841 792 0.03      
25 A 802 755 15.63      
26 A 691 651 66.23      
27 A 546 514 1.55      
28 A 470 442 4.69      
29 A 228 215 2.64      
30 A 79 75 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 21091.0 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 19871.9 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 MP2=FULL/6-31G*
ABC
0.17612 0.10409 0.06623

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -2.375 -1.573 0.000
C2 -1.429 -1.040 0.000
H3 -2.148 1.059 0.000
C4 -1.306 0.373 0.000
C5 0.000 0.808 0.000
H6 -0.005 -2.735 0.000
C7 -0.210 -1.672 0.000
S8 1.082 -0.539 0.000
H9 -0.347 2.904 0.000
H10 1.110 2.433 0.884
H11 1.110 2.433 -0.884
C12 0.503 2.217 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.08482.64132.21973.36262.63922.16683.60744.91475.38295.38294.7586
C21.08482.21861.41842.33652.21351.37332.56064.09024.39294.39293.7874
H32.64132.21861.08592.16244.35673.34833.60322.57853.64513.64512.8930
C42.21971.41841.08591.37663.36872.31992.55592.70693.29643.29642.5835
C53.36262.33652.16241.37663.54242.48881.72782.12452.15782.15781.4961
H62.63922.21354.35673.36873.54241.08222.44935.64885.36015.36014.9774
C72.16681.37333.34832.31992.48881.08221.71794.57794.40204.40203.9537
S83.60742.56063.60322.55591.72782.44931.71793.72783.10143.10142.8163
H94.91474.09022.57852.70692.12455.64884.57793.72781.76821.76821.0929
H105.38294.39293.64513.29642.15785.36014.40203.10141.76821.76831.0941
H115.38294.39293.64513.29642.15785.36014.40203.10141.76821.76831.0941
C124.75863.78742.89302.58351.49614.97743.95372.81631.09291.09411.0941

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 124.389 H1 C2 C7 123.221
C2 C4 H3 124.185 C2 C4 C5 113.423
C2 C7 H6 128.312 C2 C7 S8 111.372
H3 C4 C5 122.392 C4 C2 C7 112.390
C4 C5 S8 110.328 C4 C5 C12 128.087
C5 S8 C7 92.488 C5 C12 H9 109.295
C5 C12 H10 111.891 C5 C12 H11 111.891
H6 C7 S8 120.316 S8 C5 C12 121.586
H9 C12 H10 107.894 H9 C12 H11 107.894
H10 C12 H11 107.815
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability