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-Pentene, (Z)-)

using model chemistry: HF/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/STO-3G
 hartrees
Energy at 0K-192.823423
Energy at 298.15K-192.833513
Nuclear repulsion energy171.187767
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 HF/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 3767 3075 0.93      
2 A 3754 3065 2.52      
3 A 3752 3063 2.06      
4 A 3730 3045 1.00      
5 A 3724 3041 0.93      
6 A 3710 3029 2.27      
7 A 3683 3007 21.19      
8 A 3607 2945 3.14      
9 A 3568 2913 2.41      
10 A 3564 2910 1.96      
11 A 2108 1721 0.78      
12 A 1846 1507 1.00      
13 A 1836 1499 1.68      
14 A 1833 1497 1.17      
15 A 1824 1489 2.07      
16 A 1818 1485 1.35      
17 A 1742 1422 0.79      
18 A 1737 1418 0.51      
19 A 1697 1386 3.37      
20 A 1611 1315 29.51      
21 A 1529 1248 0.06      
22 A 1493 1219 0.03      
23 A 1376 1123 0.60      
24 A 1301 1062 2.53      
25 A 1278 1044 0.01      
26 A 1235 1008 0.14      
27 A 1230 1004 0.24      
28 A 1214 991 0.17      
29 A 1104 901 3.78      
30 A 1013 827 0.92      
31 A 936 764 1.46      
32 A 850 694 11.67      
33 A 647 528 4.79      
34 A 546 446 0.72      
35 A 332 271 0.01      
36 A 295 241 0.07      
37 A 228 186 0.01      
38 A 100 82 0.09      
39 A 43 35 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 35828.8 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 29254.2 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 HF/STO-3G
ABC
0.35905 0.08655 0.07892

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.168 -0.319 -0.422
H2 2.649 0.632 -0.627
H3 2.918 -1.004 -0.036
H4 1.791 -0.719 -1.359
C5 1.022 -0.143 0.599
H6 0.574 -1.111 0.806
H7 1.441 0.225 1.535
C8 -2.046 -0.702 -0.064
H9 -2.470 -0.967 -1.030
H10 -1.410 -1.517 0.262
H11 -2.870 -0.611 0.640
C12 -0.030 0.846 0.109
H13 0.346 1.854 -0.026
C14 -1.292 0.614 -0.165
H15 -1.902 1.443 -0.509

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 H7 C8 H9 H10 H11 C12 H13 C14 H15
C11.08601.08611.08601.54542.16222.15804.24644.72253.83455.15732.54362.86373.59304.4358
H21.08601.76071.75992.18033.06562.51054.91325.37824.67815.79782.78622.67523.96804.6238
H31.08611.76071.76122.17692.49222.48194.97265.47884.36795.84033.48273.84474.51175.4256
H41.08601.75991.76122.18082.51423.06424.04914.28063.67515.07262.81363.23783.56424.3622
C51.54542.18032.17692.18081.08591.09013.18763.94012.81313.92001.52422.19902.55153.5055
H62.16223.06562.49222.51421.08591.75122.79103.55842.09753.48452.16323.08802.72093.7924
H72.15802.51052.48193.06421.09011.75123.94664.82703.57574.48192.14072.50803.24254.1032
C84.24644.91324.97264.04913.18762.79103.94661.08791.08361.08802.54803.50151.52052.1957
H94.72255.37825.47884.28063.94013.55844.82701.08791.75921.75413.24674.11112.15322.5303
H103.83454.67814.36793.67512.81312.09753.57571.08361.75921.75972.74093.81222.17693.0979
H115.15735.79785.84035.07263.92003.48454.48191.08801.75411.75973.23644.10712.15452.5452
C122.54362.78623.48272.81361.52422.16322.14072.54803.24672.74093.23641.08451.31252.0599
H132.86372.67523.84473.23782.19903.08802.50803.50154.11113.81224.10711.08452.05942.3359
C143.59303.96804.51173.56422.55152.72093.24251.52052.15322.17692.15451.31252.05941.0846
H154.43584.62385.42564.36223.50553.79244.10322.19572.53033.09792.54522.05992.33591.0846

picture of 2-Pentene, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 109.272 C1 C5 H7 108.700
C1 C5 C12 111.921 H2 C1 H3 108.307
H2 C1 H4 108.247 H2 C1 C5 110.697
H3 C1 H4 108.351 H3 C1 C5 110.419
H4 C1 C5 110.735 C5 C12 H13 113.843
C5 C12 C14 128.021 H6 C5 H7 107.175
H6 C5 C12 110.832 H7 C5 C12 108.802
C8 C14 C12 128.006 C8 C14 H15 113.827
H9 C8 H10 108.217 H9 C8 H11 107.438
H9 C8 C14 110.164 H10 C8 H11 108.259
H10 C8 C14 112.344 H11 C8 C14 110.263
C12 C14 H15 118.167 H13 C12 C14 118.134
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.175      
2 H 0.058      
3 H 0.059      
4 H 0.059      
5 C -0.103      
6 H 0.058      
7 H 0.058      
8 C -0.187      
9 H 0.064      
10 H 0.064      
11 H 0.064      
12 C -0.064      
13 H 0.052      
14 C -0.060      
15 H 0.053      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.023 -0.134 0.023 0.138
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.733 0.228 0.472
y 0.228 -31.005 -0.205
z 0.472 -0.205 -31.890
Traceless
 xyz
x 0.714 0.228 0.472
y 0.228 0.306 -0.205
z 0.472 -0.205 -1.021
Polar
3z2-r2-2.041
x2-y20.272
xy0.228
xz0.472
yz-0.205


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.053 0.326 0.593
y 0.326 3.783 -0.132
z 0.593 -0.132 2.867


<r2> (average value of r2) Å2
<r2> 163.417
(<r2>)1/2 12.783