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 C6H10 (Cyclopentene, 4-methyl-)

using model chemistry: PBEPBEultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-234.307493
Energy at 298.15K-234.318420
Nuclear repulsion energy233.679618
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 PBEPBEultrafine/6-31G*
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 3144 3092 34.71      
2 A 3119 3068 9.48      
3 A 3050 2999 24.75      
4 A 3046 2996 44.23      
5 A 3003 2953 34.52      
6 A 2998 2949 36.94      
7 A 2974 2925 36.76      
8 A 2965 2916 11.56      
9 A 2931 2883 26.65      
10 A 2931 2882 42.05      
11 A 1650 1623 3.30      
12 A 1483 1459 7.03      
13 A 1480 1455 2.43      
14 A 1470 1446 0.43      
15 A 1462 1438 0.85      
16 A 1388 1365 2.24      
17 A 1346 1324 0.08      
18 A 1342 1320 4.65      
19 A 1304 1282 1.81      
20 A 1276 1255 0.11      
21 A 1259 1238 3.43      
22 A 1210 1190 0.39      
23 A 1142 1124 0.06      
24 A 1122 1104 2.50      
25 A 1106 1088 0.23      
26 A 1087 1069 0.40      
27 A 1047 1030 1.27      
28 A 973 957 9.25      
29 A 970 954 0.25      
30 A 925 910 0.04      
31 A 912 897 4.51      
32 A 911 896 3.79      
33 A 884 870 0.00      
34 A 810 797 1.34      
35 A 756 743 0.41      
36 A 682 670 30.93      
37 A 556 547 3.75      
38 A 414 407 1.29      
39 A 386 380 0.14      
40 A 303 298 0.10      
41 A 244 240 0.02      
42 A 107 105 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 31083.5 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 30570.6 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 PBEPBEultrafine/6-31G*
ABC
0.22321 0.10517 0.07763

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.452 1.304 -0.128
C2 1.560 0.673 -0.058
H3 2.452 -1.304 -0.128
C4 1.560 -0.673 -0.058
H5 -0.141 1.617 -1.013
H6 0.037 2.077 0.689
C7 0.155 1.231 -0.014
H8 0.037 -2.077 0.688
H9 -0.141 -1.617 -1.013
C10 0.155 -1.231 -0.014
H11 -0.770 -0.000 1.497
C12 -0.708 -0.000 0.391
H13 -2.693 0.891 0.145
H14 -2.693 -0.891 0.145
H15 -2.107 -0.000 -1.285
C16 -2.127 -0.000 -0.180

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 C12 H13 H14 H15 C16
H11.09522.60822.16992.75772.66382.30084.23424.00463.42243.83703.45745.16885.60044.88074.7611
C21.09522.16991.34542.16712.20171.51213.23043.00772.36602.88072.40754.26344.53593.92463.7495
H32.60822.16991.09524.00464.23423.42242.66382.75772.30083.83703.45745.60045.16894.88074.7611
C42.16991.34541.09523.00773.23042.36602.20172.16711.51212.88072.40754.53594.26343.92463.7495
H52.75772.16714.00463.00771.77171.11134.07023.23313.03193.05082.21502.89473.76042.55942.6926
H62.66382.20174.23423.23041.77171.10594.15334.07023.38312.37002.22603.02584.06893.57823.1223
C72.30081.51213.42242.36601.11131.10593.38313.03192.46132.15701.55662.87283.55522.87172.5979
H84.23423.23042.66382.20174.07024.15333.38311.77171.10592.37002.22604.06893.02583.57823.1223
H94.00463.00772.75772.16713.23314.07023.03191.77171.11133.05092.21503.76042.89472.55952.6926
C103.42242.36602.30081.51213.03193.38312.46131.10591.11132.15701.55663.55522.87292.87172.5980
H113.83702.88073.83702.88073.05082.37002.15702.37003.05092.15701.10732.51402.51403.08632.1567
C123.45742.40753.45742.40752.21502.22601.55662.22602.21501.55661.10732.19022.19022.18351.5298
H135.16884.26345.60044.53592.89473.02582.87284.06893.76043.55522.51402.19021.78191.78371.1044
H145.60044.53595.16894.26343.76044.06893.55523.02582.89472.87292.51402.19021.78191.78371.1044
H154.88073.92464.88073.92462.55943.57822.87173.57822.55952.87173.08632.18351.78371.78371.1055
C164.76113.74954.76113.74952.69263.12232.59793.12232.69262.59802.15671.52981.10441.10441.1055

picture of Cyclopentene, 4-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 125.205 H1 C2 C7 123.085
C2 C4 H3 125.205 C2 C4 C10 111.652
C2 C7 H5 110.464 C2 C7 H6 113.579
C2 C7 C12 103.344 H3 C4 C10 123.084
C4 C2 C7 111.652 C4 C10 H8 113.577
C4 C10 H9 110.465 C4 C10 C12 103.344
H5 C7 H6 106.077 H5 C7 C12 111.146
H6 C7 C12 112.349 C7 C12 C10 104.481
C7 C12 H11 106.926 C7 C12 C16 114.649
H8 C10 H9 106.077 H8 C10 C12 112.348
H9 C10 C12 111.147 C10 C12 H11 106.926
C10 C12 C16 114.649 H11 C12 C16 108.685
C12 C16 H13 111.474 C12 C16 H14 111.474
C12 C16 H15 110.879 H13 C16 H14 107.553
H13 C16 H15 107.635 H14 C16 H15 107.635
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.130      
2 C -0.112      
3 H 0.130      
4 C -0.112      
5 H 0.154      
6 H 0.152      
7 C -0.333      
8 H 0.152      
9 H 0.154      
10 C -0.333      
11 H 0.149      
12 C -0.103      
13 H 0.156      
14 H 0.156      
15 H 0.154      
16 C -0.494      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.184 0.000 0.015 0.185
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.801 0.000 -0.359
y 0.000 -36.724 0.000
z -0.359 0.000 -38.748
Traceless
 xyz
x -0.065 0.000 -0.359
y 0.000 1.550 0.000
z -0.359 0.000 -1.486
Polar
3z2-r2-2.971
x2-y2-1.077
xy0.000
xz-0.359
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.912 0.000 -0.048
y 0.000 10.282 0.000
z -0.048 0.000 6.824


<r2> (average value of r2) Å2
<r2> 165.384
(<r2>)1/2 12.860