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

using model chemistry: MP2/CEP-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/CEP-31G
 hartrees
Energy at 0K-41.168535
Energy at 298.15K-41.174430
HF Energy-40.715385
Nuclear repulsion energy104.569899
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-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 3247 3138 8.52      
2 A 3205 3097 13.01      
3 A 3185 3078 8.90      
4 A 3136 3030 29.72      
5 A 3031 2928 47.08      
6 A 1555 1503 0.58      
7 A 1521 1470 7.22      
8 A 1462 1413 1.40      
9 A 1457 1407 12.44      
10 A 1352 1307 0.99      
11 A 1259 1217 24.24      
12 A 1190 1150 15.91      
13 A 1101 1064 1.43      
14 A 1059 1023 3.97      
15 A 996 962 3.24      
16 A 825 797 11.65      
17 A 697 674 2.63      
18 A 616 596 3.93      
19 A 530 512 1.50      
20 A 295 285 0.83      
21 A 3128 3022 40.68      
22 A 1493 1443 11.08      
23 A 1088 1052 0.20      
24 A 810 782 1.14      
25 A 775 749 38.00      
26 A 642 620 91.44      
27 A 509 492 15.19      
28 A 435 420 3.86      
29 A 218 211 4.36      
30 A 109 105 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 20462.5 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 19772.9 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/CEP-31G
ABC
0.15945 0.09682 0.06095

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -2.479 -1.560 0.000
C2 -1.509 -1.045 0.000
H3 -2.190 1.128 0.000
C4 -1.351 0.420 0.000
C5 0.000 0.852 0.000
H6 -0.089 -2.819 0.000
C7 -0.275 -1.740 0.000
S8 1.143 -0.588 0.000
H9 -0.312 2.997 0.000
H10 1.163 2.495 0.899
H11 1.163 2.495 -0.899
C12 0.544 2.290 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.09812.70382.27893.45902.70082.21113.75005.04575.52435.52434.8949
C21.09812.27791.47412.42442.27191.41572.69094.21554.52594.52593.9164
H32.70382.27791.09792.20754.47173.44863.74892.64943.73123.73122.9708
C42.27891.47411.09791.41853.47652.41302.69002.77813.38163.38162.6622
C53.45902.42442.20751.41853.67282.60651.83852.16672.20462.20461.5369
H62.70082.27194.47173.47653.67281.09552.54935.82015.53375.53375.1482
C72.21111.41573.44862.41302.60651.09551.82684.73634.56184.56184.1117
S83.75002.69093.74892.69001.83852.54931.82683.86823.21143.21142.9391
H95.04574.21552.64942.77812.16675.82014.73633.86821.79861.79861.1100
H105.52434.52593.73123.38162.20465.53374.56183.21141.79861.79811.1107
H115.52434.52593.73123.38162.20465.53374.56183.21141.79861.79811.1107
C124.89493.91642.97082.66221.53695.14824.11172.93911.11001.11071.1107

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 124.098 H1 C2 C7 122.682
C2 C4 H3 124.014 C2 C4 C5 113.880
C2 C7 H6 129.112 C2 C7 S8 111.547
H3 C4 C5 122.106 C4 C2 C7 113.220
C4 C5 S8 110.701 C4 C5 C12 128.475
C5 S8 C7 90.652 C5 C12 H9 108.812
C5 C12 H10 111.736 C5 C12 H11 111.736
H6 C7 S8 119.341 S8 C5 C12 120.824
H9 C12 H10 108.174 H9 C12 H11 108.174
H10 C12 H11 108.085
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability