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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-592.076209
Energy at 298.15K-592.069400
HF Energy-592.343263
Nuclear repulsion energy272.466895
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 B3LYP/6-31G(2df,p)
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 3258 3144 1.27      
2 A 3215 3102 6.74      
3 A 3197 3085 7.94      
4 A 3113 3004 11.67      
5 A 3030 2924 30.93      
6 A 1593 1537 3.05      
7 A 1498 1445 1.14      
8 A 1486 1434 12.11      
9 A 1417 1367 0.91      
10 A 1381 1333 0.54      
11 A 1262 1218 9.78      
12 A 1175 1134 10.49      
13 A 1103 1064 0.91      
14 A 1069 1031 3.37      
15 A 993 958 2.02      
16 A 851 821 11.52      
17 A 747 720 0.45      
18 A 664 641 2.33      
19 A 551 532 0.69      
20 A 302 291 0.74      
21 A 3082 2974 14.05      
22 A 1479 1427 6.27      
23 A 1062 1024 0.88      
24 A 912 880 0.24      
25 A 839 809 10.61      
26 A 712 687 47.66      
27 A 579 559 0.23      
28 A 478 461 3.49      
29 A 233 225 2.13      
30 A 99 95 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 20687.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 19963.6 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 B3LYP/6-31G(2df,p)
ABC
0.17612 0.10334 0.06593

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -2.388 -1.547 0.000
C2 -1.434 -1.034 0.000
H3 -2.138 1.070 0.000
C4 -1.298 0.385 0.000
C5 0.000 0.815 0.000
H6 -0.033 -2.739 0.000
C7 -0.232 -1.678 0.000
S8 1.080 -0.551 0.000
H9 -0.318 2.923 0.000
H10 1.134 2.431 0.882
H11 1.134 2.431 -0.882
C12 0.519 2.220 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 C5 H6 C7 S8 H9 H10 H11 C12
H11.08292.62962.21883.35862.63912.15943.60814.92635.38605.38604.7584
C21.08292.21931.42632.33992.20631.36332.56024.11184.40264.40263.7955
H32.62962.21931.08382.15334.35203.34443.60342.59713.65183.65182.8954
C42.21881.42631.08381.36723.37052.32242.55592.72033.29823.29822.5823
C53.35862.33992.15331.36723.55322.50321.74102.13242.16282.16281.4981
H62.63912.20634.35203.37053.55321.07922.45445.66875.37265.37264.9889
C72.15941.36333.34442.32242.50321.07921.72984.60174.41924.41923.9694
S83.60812.56023.60342.55591.74102.45441.72983.74473.11033.11032.8268
H94.92634.11182.59712.72032.13245.66874.60173.74471.76861.76861.0936
H105.38604.40263.65183.29822.16285.37264.41923.11031.76861.76441.0957
H115.38604.40263.65183.29822.16285.37264.41923.11031.76861.76441.0957
C124.75843.79552.89542.58231.49814.98893.96942.82681.09361.09571.0957

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 123.579 H1 C2 C7 123.832
C2 C4 H3 123.498 C2 C4 C5 113.555
C2 C7 H6 128.543 C2 C7 S8 111.432
H3 C4 C5 122.947 C4 C2 C7 112.589
C4 C5 S8 110.397 C4 C5 C12 128.472
C5 S8 C7 92.026 C5 C12 H9 109.614
C5 C12 H10 111.875 C5 C12 H11 111.875
H6 C7 S8 120.025 S8 C5 C12 121.131
H9 C12 H10 107.937 H9 C12 H11 107.937
H10 C12 H11 107.438
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.104      
2 C -0.079      
3 H 0.098      
4 C -0.184      
5 C 0.222      
6 H 0.126      
7 C -0.158      
8 S -0.050      
9 H 0.133      
10 H 0.139      
11 H 0.139      
12 C -0.491      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.532 0.504 0.000 0.733
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 177.298
(<r2>)1/2 13.315