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 (Cyclopentane)

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-195.234595
Energy at 298.15K 
HF Energy-195.234595
Nuclear repulsion energy188.368881
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/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3229 2926 158.39      
2 A 3211 2910 16.91      
3 A 3208 2908 42.44      
4 A 3207 2907 41.68      
5 A 3193 2894 62.98      
6 A 3184 2886 79.49      
7 A 3164 2868 36.10      
8 A 3162 2866 17.81      
9 A 3154 2858 41.97      
10 A 3148 2854 18.62      
11 A 1649 1494 0.09      
12 A 1621 1469 2.06      
13 A 1621 1469 2.12      
14 A 1613 1462 3.55      
15 A 1607 1456 0.03      
16 A 1477 1339 0.01      
17 A 1475 1337 0.04      
18 A 1462 1325 0.02      
19 A 1438 1304 0.41      
20 A 1427 1294 0.02      
21 A 1387 1257 0.69      
22 A 1342 1216 0.34      
23 A 1338 1213 0.24      
24 A 1313 1190 0.33      
25 A 1290 1169 0.02      
26 A 1124 1019 0.01      
27 A 1105 1002 0.00      
28 A 1075 974 0.32      
29 A 1042 945 0.72      
30 A 963 873 1.55      
31 A 958 868 1.53      
32 A 935 848 0.26      
33 A 935 847 0.52      
34 A 882 800 0.05      
35 A 823 746 0.44      
36 A 661 599 0.03      
37 A 587 532 0.71      
38 A 282 256 0.01      
39 A 4i 4i 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 32641.9 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 29586.6 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 HF/Def2TZVPP
ABC
0.21858 0.21844 0.12600

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.902 -0.868 0.254
C2 -0.184 1.271 0.126
C3 -1.285 0.190 0.015
C4 -0.546 -1.156 -0.154
C5 1.124 0.560 -0.241
H6 -0.124 1.636 1.145
H7 -0.380 2.129 -0.504
H8 -1.943 0.378 -0.824
H9 -1.907 0.185 0.901
H10 -0.571 -1.466 -1.193
H11 -0.995 -1.953 0.425
H12 1.606 -1.580 -0.157
H13 1.000 -0.900 1.335
H14 1.258 0.554 -1.318
H15 1.996 1.035 0.191

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15
C12.40212.44101.53081.52712.84883.34653.28753.06812.14922.19161.08301.08622.14942.1955
C22.40211.54752.46981.53301.08411.08252.19022.17913.06273.33773.37862.75252.16312.1936
C32.44101.54751.54492.45042.17202.20201.08251.08272.17002.20063.39452.85532.89413.3928
C41.53082.46981.54492.39533.10793.30772.18082.18261.08461.08262.19322.16112.74423.3728
C51.52711.53302.45042.39532.15322.18943.12723.25982.80733.35322.19532.15171.08601.0830
H62.84881.08412.17203.10792.15321.74052.96142.31113.90983.76213.87752.78033.02502.4016
H73.34651.08252.20203.30772.18941.74052.36902.84323.66514.23104.22193.80292.41392.7070
H83.28752.19021.08252.18083.12722.96142.36901.73642.32772.80914.10823.86743.24374.1207
H93.06812.17911.08272.18263.25982.31112.84321.73642.98232.37214.07143.13243.88274.0565
H102.14923.06272.17001.08462.80733.90983.66512.32772.98231.74212.41363.02962.72733.8413
H112.19163.33772.20061.08263.35323.76214.23102.80912.37211.74212.69162.43213.79434.2335
H121.08303.37863.39452.19322.19533.87754.22194.10824.07142.41362.69161.74892.45422.6663
H131.08622.75252.85532.16112.15172.78033.80293.86743.13243.02962.43211.74893.03672.4582
H142.14942.16312.89412.74421.08603.02502.41393.24373.88272.72733.79432.45423.03671.7479
H152.19552.19363.39283.37281.08302.40162.70704.12074.05653.84134.23352.66632.45821.7479

picture of Cyclopentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 C3 105.053 C1 C4 H10 109.337
C1 C4 H11 112.864 C1 C5 C2 103.434
C1 C5 H14 109.523 C1 C5 H15 113.430
C2 C3 C4 106.006 C2 C3 H8 111.540
C2 C3 H9 110.641 C2 C5 H14 110.200
C2 C5 H15 112.840 C3 C2 C5 105.397
C3 C2 H6 109.993 C3 C2 H7 112.498
C3 C4 H10 109.999 C3 C4 H11 112.577
C4 C1 C5 103.126 C4 C1 H12 112.963
C4 C1 H13 110.179 C4 C3 H8 110.977
C4 C3 H9 111.110 C5 C1 H12 113.405
C5 C1 H13 109.687 C5 C2 H6 109.529
C5 C2 H7 112.531 H6 C2 H7 106.900
H8 C3 H9 106.641 H10 C4 H11 107.004
H12 C1 H13 107.451 H14 C5 H15 107.386
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.068      
2 C -0.095      
3 C -0.101      
4 C -0.092      
5 C -0.073      
6 H 0.043      
7 H 0.051      
8 H 0.048      
9 H 0.047      
10 H 0.042      
11 H 0.050      
12 H 0.040      
13 H 0.033      
14 H 0.034      
15 H 0.042      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.014 -0.005 0.000 0.015
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.117 0.004 -0.000
y 0.004 -34.105 -0.037
z -0.000 -0.037 -32.767
Traceless
 xyz
x -0.681 0.004 -0.000
y 0.004 -0.663 -0.037
z -0.000 -0.037 1.344
Polar
3z2-r22.688
x2-y2-0.012
xy0.004
xz-0.000
yz-0.037


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.446 0.002 0.000
y 0.002 8.448 0.019
z 0.000 0.019 7.421


<r2> (average value of r2) Å2
<r2> 115.038
(<r2>)1/2 10.726