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: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-195.929587
Energy at 298.15K-195.941249
HF Energy-195.179986
Nuclear repulsion energy188.231653
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 MP2=FULL/6-31+G**
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 3205 3010 88.36      
2 A 3191 2997 15.63      
3 A 3190 2996 22.30      
4 A 3181 2988 12.29      
5 A 3176 2983 23.63      
6 A 3141 2950 45.09      
7 A 3126 2936 49.16      
8 A 3124 2934 15.44      
9 A 3118 2928 37.29      
10 A 3115 2926 25.23      
11 A 1566 1471 0.15      
12 A 1539 1445 3.10      
13 A 1538 1445 3.41      
14 A 1531 1438 4.86      
15 A 1524 1431 0.06      
16 A 1386 1302 0.05      
17 A 1384 1299 0.07      
18 A 1377 1293 0.04      
19 A 1357 1274 0.68      
20 A 1326 1245 0.01      
21 A 1303 1224 0.96      
22 A 1263 1186 0.14      
23 A 1254 1178 0.40      
24 A 1228 1153 0.29      
25 A 1209 1136 0.00      
26 A 1091 1025 0.05      
27 A 1073 1008 0.00      
28 A 1023 960 0.67      
29 A 987 927 1.48      
30 A 943 886 2.13      
31 A 936 879 2.22      
32 A 917 862 0.65      
33 A 897 843 0.58      
34 A 847 796 0.21      
35 A 789 741 0.56      
36 A 620 582 0.08      
37 A 557 523 0.55      
38 A 282 265 0.01      
39 A 11 10 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 31661.4 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 29736.4 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 MP2=FULL/6-31+G**
ABC
0.21845 0.21828 0.12653

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.790 -0.964 0.265
C2 -0.030 1.282 0.130
C3 -1.253 0.340 0.015
C4 -0.675 -1.082 -0.159
C5 1.178 0.420 -0.252
H6 0.084 1.624 1.160
H7 -0.127 2.171 -0.493
H8 -1.887 0.611 -0.829
H9 -1.874 0.403 0.908
H10 -0.719 -1.379 -1.209
H11 -1.226 -1.830 0.410
H12 1.414 -1.767 -0.128
H13 0.872 -0.984 1.355
H14 1.290 0.382 -1.338
H15 2.114 0.795 0.164

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13 H14 H15
C12.39512.43721.53081.52712.82813.35293.29403.06282.15052.19991.09011.09312.15242.2034
C22.39511.54822.46821.53301.09131.08962.19542.18633.05823.34633.38352.72902.16972.1988
C32.43721.54821.54542.44752.17932.20821.08971.08992.17722.20653.40192.83982.88063.4009
C41.53082.46821.54542.38793.10563.31572.18792.18681.09171.08972.19872.16732.71973.3777
C51.52711.53302.44752.38792.15452.19733.12563.26562.78443.35922.20262.15531.09291.0900
H62.82811.09132.17933.10562.15451.75402.97802.32183.90903.77023.86372.73123.03942.4086
H73.35291.08962.20823.31572.19731.75402.37522.85333.66944.24644.24393.78982.43292.7103
H83.29402.19541.08972.18793.12562.97802.37521.74952.33972.81704.12863.86353.22584.1266
H93.06282.18631.08992.18683.26562.32182.85331.74952.99882.37784.07333.10823.88024.0759
H102.15053.05822.17721.09172.78443.90903.66942.33972.99881.75582.42203.04332.67483.8257
H112.19993.34632.20651.08973.35923.77024.24642.81702.37781.75582.69532.45183.77944.2556
H121.09013.38353.40192.19872.20263.86374.24394.12864.07332.42202.69531.76302.46952.6717
H131.09312.72902.83982.16732.15532.73123.78983.86353.10823.04332.45181.76303.04882.4752
H142.15242.16972.88062.71971.09293.03942.43293.22583.88022.67483.77942.46953.04881.7620
H152.20342.19883.40093.37771.09002.40862.71034.12664.07593.82574.25562.67172.47521.7620

picture of Cyclopentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 C3 104.800 C1 C4 H10 109.023
C1 C4 H11 113.097 C1 C5 C2 103.012
C1 C5 H14 109.358 C1 C5 H15 113.636
C2 C3 C4 105.853 C2 C3 H8 111.477
C2 C3 H9 110.741 C2 C5 H14 110.310
C2 C5 H15 112.826 C3 C2 C5 105.182
C3 C2 H6 110.106 C3 C2 H7 112.515
C3 C4 H10 110.113 C3 C4 H11 112.579
C4 C1 C5 102.682 C4 C1 H12 112.972
C4 C1 H13 110.262 C4 C3 H8 111.078
C4 C3 H9 110.983 C5 C1 H12 113.570
C5 C1 H13 109.576 C5 C2 H6 109.213
C5 C2 H7 112.733 H6 C2 H7 107.085
H8 C3 H9 106.780 H10 C4 H11 107.206
H12 C1 H13 107.720 H14 C5 H15 107.646
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability