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All results from a given calculation for C5H8 (Bicyclo[1.1.1]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 D3H 1A1'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.308032
Energy at 298.15K 
HF Energy-31.902143
Nuclear repulsion energy94.111153
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 A1' 3123 3018 0.00      
2 A1' 3059 2956 0.00      
3 A1' 1561 1509 0.00      
4 A1' 1106 1069 0.00      
5 A1' 900 870 0.00      
6 A1" 988 955 0.00      
7 A2' 3139 3034 0.00      
8 A2' 961 928 0.00      
9 A2" 3107 3002 134.44      
10 A2" 1240 1198 35.97      
11 A2" 804 777 11.97      
12 E' 3152 3046 94.37      
12 E' 3152 3046 94.37      
13 E' 3052 2950 107.74      
13 E' 3052 2950 107.74      
14 E' 1526 1475 1.06      
14 E' 1526 1475 1.06      
15 E' 1225 1184 0.15      
15 E' 1225 1184 0.15      
16 E' 1104 1067 0.00      
16 E' 1104 1067 0.00      
17 E' 870 841 3.49      
17 E' 870 841 3.49      
18 E' 533 515 0.25      
18 E' 533 515 0.25      
19 E" 1221 1180 0.00      
19 E" 1221 1180 0.00      
20 E" 1127 1089 0.00      
20 E" 1127 1089 0.00      
21 E" 1021 987 0.00      
21 E" 1021 987 0.00      
22 E" 773 747 0.00      
22 E" 773 747 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25599.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 24737.0 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
0.22634 0.22634 0.19649

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.976
C2 0.000 1.279 0.000
C3 1.107 -0.639 0.000
C4 -1.107 -0.639 0.000
C5 0.000 0.000 -0.976
H6 0.000 0.000 2.082
H7 0.000 0.000 -2.082
H8 0.921 1.899 0.000
H9 -0.921 1.899 0.000
H10 1.184 -1.747 0.000
H11 2.105 -0.152 0.000
H12 -2.105 -0.152 0.000
H13 -1.184 -1.747 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.60841.60841.60841.95141.10613.05752.32512.32512.32512.32512.32512.3251
C21.60842.21472.21471.60842.44312.44311.11031.11033.24912.54512.54513.2491
C31.60842.21472.21471.60842.44312.44312.54513.24911.11031.11033.24912.5451
C41.60842.21472.21471.60842.44312.44313.24912.54512.54513.24911.11031.1103
C51.95141.60841.60841.60843.05751.10612.32512.32512.32512.32512.32512.3251
H61.10612.44312.44312.44313.05754.16362.96442.96442.96442.96442.96442.9644
H73.05752.44312.44312.44311.10614.16362.96442.96442.96442.96442.96442.9644
H82.32511.11032.54513.24912.32512.96442.96441.84193.65542.36803.65544.2100
H92.32511.11033.24912.54512.32512.96442.96441.84194.21003.65542.36803.6554
H102.32513.24911.11032.54512.32512.96442.96443.65544.21001.84193.65542.3680
H112.32512.54511.11033.24912.32512.96442.96442.36803.65541.84194.21003.6554
H122.32512.54513.24911.11032.32512.96442.96443.65542.36803.65544.21001.8419
H132.32513.24912.54511.11032.32512.96442.96444.21003.65542.36803.65541.8419

picture of Bicyclo[1.1.1]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 74.692 C1 C2 H8 116.364
C1 C2 H9 116.364 C1 C3 C5 74.692
C1 C3 H10 116.364 C1 C3 H11 116.364
C1 C4 C5 74.692 C1 C4 H12 116.364
C1 C4 H13 116.364 C2 C1 C3 87.019
C2 C1 C4 87.019 C2 C1 H6 127.346
C2 C5 C3 87.019 C2 C5 C4 87.019
C2 C5 H7 127.346 C3 C1 C4 87.020
C3 C1 H6 127.346 C3 C5 C4 87.020
C3 C5 H7 127.346 C4 C1 H6 127.346
C4 C5 H7 127.346 C5 C2 H8 116.364
C5 C2 H9 116.364 C5 C3 H10 116.364
C5 C3 H11 116.364 C5 C4 H12 116.364
C5 C4 H13 116.364 H8 C2 H9 112.083
H10 C3 H11 112.083 H12 C4 H13 112.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability