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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-233.368552
Energy at 298.15K-233.379711
Nuclear repulsion energy233.477242
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/3-21G
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 3226 3113 25.73      
2 A 3198 3085 5.44      
3 A 3109 3000 58.90      
4 A 3102 2993 23.11      
5 A 3087 2979 18.35      
6 A 3080 2972 26.23      
7 A 3057 2950 3.26      
8 A 3042 2935 29.93      
9 A 3024 2918 15.45      
10 A 3024 2918 33.56      
11 A 1683 1623 1.20      
12 A 1570 1515 7.67      
13 A 1564 1509 3.07      
14 A 1545 1491 1.04      
15 A 1541 1487 2.30      
16 A 1463 1411 4.30      
17 A 1395 1346 0.30      
18 A 1384 1336 4.40      
19 A 1363 1315 0.01      
20 A 1326 1280 2.43      
21 A 1319 1273 7.08      
22 A 1279 1235 0.92      
23 A 1209 1167 0.58      
24 A 1166 1125 3.62      
25 A 1165 1124 0.09      
26 A 1125 1086 0.45      
27 A 1065 1028 0.79      
28 A 1000 965 4.03      
29 A 991 956 0.65      
30 A 968 934 3.93      
31 A 953 920 2.97      
32 A 925 892 2.64      
33 A 906 874 2.48      
34 A 812 784 1.62      
35 A 789 761 0.67      
36 A 715 690 42.73      
37 A 589 568 5.76      
38 A 425 410 1.38      
39 A 395 381 0.07      
40 A 326 315 0.22      
41 A 259 250 0.03      
42 A 92 89 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 32127.5 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 30999.8 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/3-21G
ABC
0.22051 0.10516 0.07771

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -2.439 -1.295 -0.173
C2 -1.561 -0.668 -0.081
H3 -2.439 1.295 -0.173
C4 -1.561 0.668 -0.081
H5 0.167 -1.637 -0.962
H6 -0.070 -2.052 0.747
C7 -0.153 -1.241 0.014
H8 -0.070 2.052 0.747
H9 0.167 1.637 -0.962
C10 -0.152 1.241 0.014
H11 0.811 0.000 1.511
C12 0.718 0.000 0.418
H13 2.687 -0.887 0.087
H14 2.687 0.887 0.086
H15 2.037 -0.000 -1.309
C16 2.119 -0.000 -0.216

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 H6 C7 H8 H9 C10 H11 C12 H13 H14 H15 C16
H11.08352.59062.15252.74432.65152.29494.20254.00183.42043.88273.46365.14935.57794.79604.7385
C21.08352.15251.33532.16812.19621.52363.20983.01222.37422.93342.42684.25714.52703.85943.7420
H32.59062.15251.08354.00174.20263.42042.65152.74432.29503.88293.46375.57795.14944.79604.7385
C42.15251.33531.08353.01213.20992.37422.19622.16821.52372.93342.42684.52704.25723.85953.7420
H52.74432.16814.00173.01211.77431.10024.07253.27453.05623.03442.21092.83073.71812.50922.6544
H62.65152.19624.20263.20991.77431.09594.10364.07253.37492.36002.22273.06544.08413.58853.1509
C72.29491.52363.42042.37421.10021.09593.37493.05632.48292.17021.56942.86283.55002.84332.5985
H84.20253.20982.65152.19624.07254.10363.37491.77431.09592.36002.22264.08423.06563.58863.1510
H94.00183.01222.74432.16823.27454.07253.05631.77431.10023.03442.21093.71822.83082.50942.6545
C103.42042.37422.29501.52373.05623.37492.48291.09591.10022.17021.56933.55002.86282.84332.5985
H113.88272.93343.88292.93343.03442.36002.17022.36003.03442.17021.09662.51722.51723.07472.1657
C123.46362.42683.46372.42682.21092.22271.56942.22262.21091.56931.09662.18512.18512.17291.5371
H135.14934.25715.57794.52702.83073.06542.86284.08423.71823.55002.51722.18511.77481.77741.0964
H145.57794.52705.14944.25723.71814.08413.55003.06562.83082.86282.51722.18511.77481.77741.0964
H154.79603.85944.79603.85952.50923.58852.84333.58862.50942.84333.07472.17291.77741.77741.0967
C164.73853.74204.73853.74202.65443.15092.59853.15102.65452.59852.16571.53711.09641.09641.0967

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 125.399 H1 C2 C7 122.442
C2 C4 H3 125.402 C2 C4 C10 112.120
C2 C7 H5 110.401 C2 C7 H6 112.928
C2 C7 C12 103.358 H3 C4 C10 122.442
C4 C2 C7 112.125 C4 C10 H8 112.921
C4 C10 H9 110.401 C4 C10 C12 103.359
H5 C7 H6 107.788 H5 C7 C12 110.590
H6 C7 C12 111.779 C7 C12 C10 104.571
C7 C12 H11 107.666 C7 C12 C16 113.539
H8 C10 H9 107.788 H8 C10 C12 111.781
H9 C10 C12 110.595 C10 C12 H11 107.667
C10 C12 C16 113.543 H11 C12 C16 109.496
C12 C16 H13 111.036 C12 C16 H14 111.037
C12 C16 H15 110.055 H13 C16 H14 108.060
H13 C16 H15 108.278 H14 C16 H15 108.277
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.174     0.154
2 C -0.163     -0.236
3 H 0.174     0.154
4 C -0.163     -0.236
5 H 0.197     0.070
6 H 0.191     0.047
7 C -0.396     -0.067
8 H 0.191     0.047
9 H 0.197     0.070
10 C -0.396     -0.067
11 H 0.198     0.045
12 C -0.216     0.147
13 H 0.185     0.132
14 H 0.185     0.132
15 H 0.185     0.146
16 C -0.542     -0.538


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.186 0.000 -0.004 0.186
CHELPG        
AIM        
ESP 0.181 0.000 -0.017 0.182


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.817 -0.000 0.399
y -0.000 -36.895 -0.000
z 0.399 -0.000 -39.365
Traceless
 xyz
x 0.312 -0.000 0.399
y -0.000 1.697 -0.000
z 0.399 -0.000 -2.009
Polar
3z2-r2-4.018
x2-y2-0.923
xy-0.000
xz0.399
yz-0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.957 0.000 0.106
y 0.000 9.593 0.000
z 0.106 0.000 6.174


<r2> (average value of r2) Å2
<r2> 165.506
(<r2>)1/2 12.865