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All results from a given calculation for C5H6S (Thiophene, 2-methyl-)

using model chemistry: MP2/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 MP2/CEP-121G
 hartrees
Energy at 0K-41.232184
Energy at 298.15K-41.237646
HF Energy-40.731098
Nuclear repulsion energy105.236662
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/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 3208 3131 5.00      
2 A 3165 3089 12.95      
3 A 3147 3071 10.95      
4 A 3074 3000 22.34      
5 A 2968 2897 41.70      
6 A 1545 1508 1.02      
7 A 1518 1482 6.56      
8 A 1464 1428 0.93      
9 A 1441 1406 14.02      
10 A 1349 1317 1.13      
11 A 1263 1233 24.13      
12 A 1178 1149 14.91      
13 A 1104 1077 1.27      
14 A 1055 1030 2.62      
15 A 990 966 3.84      
16 A 828 808 10.55      
17 A 696 679 2.82      
18 A 612 597 3.72      
19 A 531 519 1.19      
20 A 296 289 0.83      
21 A 3065 2991 25.84      
22 A 1486 1451 10.13      
23 A 1075 1049 0.17      
24 A 687 670 33.77      
25 A 642 626 10.61      
26 A 595 581 62.95      
27 A 404 394 6.31      
28 A 294 287 18.50      
29 A 166 162 0.00      
30 A 88 86 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 19964.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 19485.3 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/CEP-121G
ABC
0.16130 0.09788 0.06163

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.758 -2.209 0.000
C2 -0.955 -1.468 0.000
H3 -2.166 0.441 0.000
C4 -1.176 -0.022 0.000
C5 0.000 0.741 0.000
H6 0.850 -2.814 0.000
C7 0.398 -1.824 0.000
S8 1.476 -0.352 0.000
H9 -0.849 2.720 0.000
H10 0.694 2.616 0.893
H11 0.694 2.616 -0.893
C12 0.154 2.260 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.09182.68092.26233.43342.67732.18993.72865.01135.48505.48504.8600
C21.09182.26121.46302.40682.25161.39902.67504.18964.49454.49453.8897
H32.68092.26121.09302.18674.43793.42123.72732.63183.70233.70232.9476
C42.26231.46301.09301.40203.44982.39252.67252.76143.35493.35492.6412
C53.43342.40682.18671.40203.65522.59541.83652.15352.19002.19001.5268
H62.67732.25164.43793.44983.65521.08862.54035.78905.50555.50555.1217
C72.18991.39903.42122.39252.59541.08861.82424.71174.53864.53864.0911
S83.72862.67503.72732.67251.83652.54031.82423.85263.19693.19692.9278
H95.01134.18962.63182.76142.15355.78904.71173.85261.78591.78591.1031
H105.48504.49453.70233.35492.19005.50554.53863.19691.78591.78681.1032
H115.48504.49453.70233.35492.19005.50554.53863.19691.78591.78681.1032
C124.86003.88972.94762.64121.52685.12174.09112.92781.10311.10321.1032

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 123.980 H1 C2 C7 122.607
C2 C4 H3 123.779 C2 C4 C5 114.279
C2 C7 H6 129.256 C2 C7 S8 111.500
H3 C4 C5 121.942 C4 C2 C7 113.413
C4 C5 S8 110.505 C4 C5 C12 128.741
C5 S8 C7 90.304 C5 C12 H9 108.870
C5 C12 H10 111.744 C5 C12 H11 111.744
H6 C7 S8 119.244 S8 C5 C12 120.754
H9 C12 H10 108.095 H9 C12 H11 108.095
H10 C12 H11 108.164
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability