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All results from a given calculation for C5H8 (Bicyclo[1.1.1]pentane)

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-194.630397
Energy at 298.15K 
HF Energy-193.920621
Nuclear repulsion energy179.891171
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 MP2/6-31+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 A1' 3187 2997 0.00      
2 A1' 3127 2941 0.00      
3 A1' 1594 1500 0.00      
4 A1' 1155 1086 0.00      
5 A1' 921 866 0.00      
6 A1" 1011 951 0.00      
7 A2' 3199 3009 0.00      
8 A2' 991 932 0.00      
9 A2" 3182 2993 122.22      
10 A2" 1279 1203 44.17      
11 A2" 870 818 6.00      
12 E' 3203 3013 63.05      
12 E' 3203 3013 63.05      
13 E' 3123 2938 76.73      
13 E' 3123 2938 76.73      
14 E' 1543 1452 0.10      
14 E' 1543 1452 0.10      
15 E' 1283 1206 2.51      
15 E' 1283 1206 2.51      
16 E' 1139 1071 0.52      
16 E' 1139 1071 0.52      
17 E' 930 875 0.61      
17 E' 930 875 0.61      
18 E' 556 523 0.13      
18 E' 556 523 0.13      
19 E" 1239 1165 0.00      
19 E" 1239 1165 0.00      
20 E" 1162 1093 0.00      
20 E" 1162 1093 0.00      
21 E" 1040 978 0.00      
21 E" 1040 978 0.00      
22 E" 821 772 0.00      
22 E" 821 772 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26294.8 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 24732.9 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 MP2/6-31+G**
ABC
0.24232 0.24232 0.20964

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.937
C2 0.000 1.234 0.000
C3 1.069 -0.617 0.000
C4 -1.069 -0.617 0.000
C5 0.000 0.000 -0.937
H6 0.000 0.000 2.027
H7 0.000 0.000 -2.027
H8 0.903 1.847 0.000
H9 -0.903 1.847 0.000
H10 1.147 -1.706 0.000
H11 2.051 -0.141 0.000
H12 -2.051 -0.141 0.000
H13 -1.147 -1.706 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54991.54991.54991.87451.08932.96382.25932.25932.25932.25932.25932.2593
C21.54992.13812.13811.54992.37292.37291.09131.09133.15612.46942.46943.1561
C31.54992.13812.13811.54992.37292.37292.46943.15611.09131.09133.15612.4694
C41.54992.13812.13811.54992.37292.37293.15612.46942.46943.15611.09131.0913
C51.87451.54991.54991.54992.96381.08932.25932.25932.25932.25932.25932.2593
H61.08932.37292.37292.37292.96384.05302.88672.88672.88672.88672.88672.8867
H72.96382.37292.37292.37291.08934.05302.88672.88672.88672.88672.88672.8867
H82.25931.09132.46943.15612.25932.88672.88671.80693.56072.29503.56074.1019
H92.25931.09133.15612.46942.25932.88672.88671.80694.10193.56072.29503.5607
H102.25933.15611.09132.46942.25932.88672.88673.56074.10191.80693.56072.2950
H112.25932.46941.09133.15612.25932.88672.88672.29503.56071.80694.10193.5607
H122.25932.46943.15611.09132.25932.88672.88673.56072.29503.56074.10191.8069
H132.25933.15612.46941.09132.25932.88672.88674.10193.56072.29503.56071.8069

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 74.416 C1 C2 H8 116.537
C1 C2 H9 116.537 C1 C3 C5 74.416
C1 C3 H10 116.537 C1 C3 H11 116.537
C1 C4 C5 74.416 C1 C4 H12 116.537
C1 C4 H13 116.537 C2 C1 C3 87.219
C2 C1 C4 87.219 C2 C1 H6 127.208
C2 C5 C3 87.219 C2 C5 C4 87.219
C2 C5 H7 127.208 C3 C1 C4 87.219
C3 C1 H6 127.208 C3 C5 C4 87.219
C3 C5 H7 127.208 C4 C1 H6 127.208
C4 C5 H7 127.208 C5 C2 H8 116.537
C5 C2 H9 116.537 C5 C3 H10 116.537
C5 C3 H11 116.537 C5 C4 H12 116.537
C5 C4 H13 116.537 H8 C2 H9 111.756
H10 C3 H11 111.756 H12 C4 H13 111.756
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability