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All results from a given calculation for C5H8 (Bicyclo[2.1.0]pentane)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.324757
Energy at 298.15K-32.333815
HF Energy-31.923052
Nuclear repulsion energy92.495342
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/CEP-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' 3239 3130 39.18      
2 A' 3190 3082 24.93      
3 A' 3148 3042 89.37      
4 A' 3116 3011 29.39      
5 A' 3059 2956 77.63      
6 A' 1527 1476 1.55      
7 A' 1511 1460 3.32      
8 A' 1355 1309 1.59      
9 A' 1266 1223 2.64      
10 A' 1216 1175 1.83      
11 A' 1126 1088 1.29      
12 A' 1027 992 0.15      
13 A' 965 932 5.11      
14 A' 940 908 5.51      
15 A' 908 877 2.68      
16 A' 796 769 4.32      
17 A' 744 719 14.99      
18 A' 404 390 0.95      
19 A" 3171 3064 28.15      
20 A" 3127 3022 0.00      
21 A" 3048 2946 66.00      
22 A" 1506 1455 1.13      
23 A" 1299 1255 7.40      
24 A" 1277 1234 0.31      
25 A" 1232 1190 0.18      
26 A" 1136 1098 7.09      
27 A" 1124 1086 2.85      
28 A" 1067 1031 0.62      
29 A" 978 945 4.93      
30 A" 933 902 0.69      
31 A" 776 750 21.87      
32 A" 687 664 0.12      
33 A" 225 218 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 25560.3 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 24698.9 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/CEP-31G
ABC
0.28604 0.19284 0.15056

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.258 -0.557 0.796
C2 -0.258 -0.557 -0.796
C3 -0.258 1.021 0.806
C4 -0.258 1.021 -0.806
C5 0.984 -1.067 0.000
H6 -0.802 -1.209 1.495
H7 -0.802 -1.209 -1.495
H8 0.618 1.495 1.301
H9 0.618 1.495 -1.301
H10 -1.193 1.449 1.224
H11 -1.193 1.449 -1.224
H12 1.917 -0.477 0.000
H13 1.125 -2.159 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.59161.57792.24881.56011.09982.44292.28753.06182.25382.99592.31722.2611
C21.59162.24881.57791.56012.44291.09983.06182.28752.99592.25382.31722.2611
C31.57792.24881.61302.55902.39623.25021.11192.33111.10962.27582.76133.5604
C42.24881.57791.61302.55903.25022.39622.33111.11192.27581.10962.76133.5604
C51.56011.56012.55902.55902.33302.33302.89622.89623.54403.54401.10391.1020
H61.09982.44292.39623.25022.33302.98953.06014.14052.69963.82173.18782.6173
H72.44291.09983.25022.39622.33302.98954.14053.06013.82172.69963.18782.6173
H82.28753.06181.11192.33112.89623.06014.14052.60241.81293.10742.69653.9121
H93.06182.28752.33111.11192.89624.14053.06012.60243.10741.81292.69653.9121
H102.25382.99591.10962.27583.54402.69963.82171.81293.10742.44763.85714.4594
H112.99592.25382.27581.10963.54403.82172.69963.10741.81292.44763.85714.4594
H122.31722.31722.76132.76131.10393.18783.18782.69652.69653.85713.85711.8593
H132.26112.26113.56043.56041.10202.61732.61733.91213.91214.45944.45941.8593

picture of Bicyclo[2.1.0]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 90.389 C1 C2 C5 59.330
C1 C2 H7 129.461 C1 C3 C4 89.611
C1 C3 H8 115.430 C1 C3 H10 112.829
C1 C5 C2 61.339 C1 C5 H12 119.903
C1 C5 H13 115.208 C2 C1 C3 90.389
C2 C1 C5 59.330 C2 C1 H6 129.461
C2 C4 C3 89.611 C2 C4 H9 115.430
C2 C4 H11 112.829 C2 C5 H12 119.903
C2 C5 H13 115.208 C3 C1 C5 109.272
C3 C1 H6 126.041 C3 C4 H9 116.420
C3 C4 H11 112.092 C4 C2 C5 109.272
C4 C2 H7 126.041 C4 C3 H8 116.420
C4 C3 H10 112.092 C5 C1 H6 121.622
C5 C2 H7 121.622 H8 C3 H10 109.383
H9 C4 H11 109.383 H12 C5 H13 114.896
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability