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 C5H10 (2-Butene, 2-methyl-)

using model chemistry: B3LYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/STO-3G
 hartrees
Energy at 0K-194.182505
Energy at 298.15K-194.191907
Nuclear repulsion energy172.163413
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/STO-3G
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 3490 3115 1.65      
2 A 3486 3111 1.09      
3 A 3480 3106 1.26      
4 A 3424 3056 8.27      
5 A 3300 2945 1.77      
6 A 3297 2942 3.59      
7 A 3294 2939 2.40      
8 A 1894 1690 0.39      
9 A 1687 1505 5.22      
10 A 1683 1502 2.38      
11 A 1679 1498 0.58      
12 A 1583 1413 0.53      
13 A 1568 1399 2.70      
14 A 1566 1397 0.51      
15 A 1478 1319 8.94      
16 A 1330 1187 6.92      
17 A 1210 1080 7.64      
18 A 1147 1024 9.25      
19 A 1050 937 1.32      
20 A 1031 920 0.72      
21 A 815 727 1.71      
22 A 544 485 2.08      
23 A 382 341 0.36      
24 A 301 268 0.11      
25 A 3443 3072 2.81      
26 A 3442 3071 0.53      
27 A 3438 3068 1.25      
28 A 1677 1497 11.38      
29 A 1674 1494 0.02      
30 A 1669 1490 0.58      
31 A 1195 1066 3.90      
32 A 1151 1027 0.11      
33 A 1106 987 1.05      
34 A 889 793 7.93      
35 A 456 407 1.51      
36 A 259 231 1.44      
37 A 160 143 0.38      
38 A 124 111 0.01      
39 A 100 89 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 32748.6 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 29224.8 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/STO-3G
ABC
0.26014 0.11449 0.08325

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.537 0.468 0.000
H2 -1.964 -0.544 0.000
H3 -1.912 1.004 0.889
H4 -1.912 1.004 -0.889
C5 0.291 -2.116 0.000
H6 0.678 -2.644 -0.889
H7 0.678 -2.644 0.889
H8 -0.805 -2.201 0.000
C9 0.760 -0.660 0.000
H10 1.853 -0.537 0.000
C11 0.000 0.451 0.000
C12 0.648 1.847 0.000
H13 1.746 1.775 0.000
H14 0.335 2.421 0.889
H15 0.335 2.421 -0.889

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 H8 C9 H10 C11 C12 H13 H14 H15
C11.09831.10341.10343.16553.92233.92232.76802.55903.53621.53722.58413.53332.84732.8473
H21.09831.78521.78522.74843.48993.48992.02222.72583.81672.20113.54114.37443.85523.8552
H31.10341.78521.77773.92134.81414.47403.50523.27084.16462.18022.83893.84282.65693.1969
H41.10341.78521.77773.92134.47404.81413.50523.27084.16462.18022.83893.84283.19692.6569
C53.16552.74843.92133.92131.10381.10381.09871.53002.22122.58333.97964.15434.62364.6236
H63.92233.48994.81414.47401.10381.77721.78462.17582.57083.29064.57874.63245.37905.0768
H73.92233.48994.47404.81411.10381.77721.78462.17582.57083.29064.57874.63245.07685.3790
H82.76802.02223.50523.50521.09871.78461.78462.19623.13562.77124.30134.72374.84274.8427
C92.55902.72583.27083.27081.53002.17582.17582.19621.10021.34562.50972.62683.23463.2346
H103.53623.81674.16464.16462.22122.57082.57083.13561.10022.10012.67182.31483.44213.4421
C111.53722.20112.18022.18022.58333.29063.29062.77121.34562.10011.53972.19112.18732.1873
C122.58413.54112.83892.83893.97964.57874.57874.30132.50972.67181.53971.09981.10361.1036
H133.53334.37443.84283.84284.15434.63244.63244.72372.62682.31482.19111.09981.78851.7885
H142.84733.85522.65693.19694.62365.37905.07684.84273.23463.44212.18731.10361.78851.7782
H152.84733.85523.19692.65694.62365.07685.37904.84273.23463.44212.18731.10361.78851.7782

picture of 2-Butene, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C11 C9 125.033 C1 C11 C12 114.243
H2 C1 H3 108.354 H2 C1 H4 108.354
H2 C1 C11 112.193 H3 C1 H4 107.334
H3 C1 C11 110.228 H4 C1 C11 110.228
C5 C9 H10 114.246 C5 C9 C11 127.768
H6 C5 H7 107.222 H6 C5 H8 108.233
H6 C5 C9 110.349 H7 C5 H8 108.233
H7 C5 C9 110.349 H8 C5 C9 112.286
C9 C11 C12 120.724 H10 C9 C11 117.986
C11 C12 H13 111.126 C11 C12 H14 110.602
C11 C12 H15 110.602 H13 C12 H14 108.524
H13 C12 H15 108.524 H14 C12 H15 107.347
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 H 0.077      
3 H 0.077      
4 H 0.077      
5 C -0.225      
6 H 0.078      
7 H 0.078      
8 H 0.077      
9 C -0.086      
10 H 0.065      
11 C 0.003      
12 C -0.223      
13 H 0.076      
14 H 0.076      
15 H 0.076      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.157 0.075 0.000 0.174
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.148 -0.271 0.000
y -0.271 -29.733 0.000
z 0.000 0.000 -31.504
Traceless
 xyz
x 0.470 -0.271 0.000
y -0.271 1.093 0.000
z 0.000 0.000 -1.564
Polar
3z2-r2-3.127
x2-y2-0.415
xy-0.271
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.538 -0.853 0.000
y -0.853 5.992 0.000
z 0.000 0.000 2.744


<r2> (average value of r2) Å2
<r2> 152.669
(<r2>)1/2 12.356