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 C5H8 (Bicyclo[1.1.1]pentane)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CBS-Q
 hartrees
Energy at 0K-194.849010
Energy at 298.15K-194.844105
HF Energy-193.903299
Nuclear repulsion energy180.146798
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 CBS-Q
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' 3277 3277 0.00 314.38 0.14 0.25
2 A1' 3216 3216 0.00 288.63 0.34 0.51
3 A1' 1695 1695 0.00 6.10 0.74 0.85
4 A1' 1203 1203 0.00 32.83 0.00 0.00
5 A1' 985 985 0.00 9.31 0.03 0.05
6 A1" 1085 1085 0.00 0.00 0.60 0.75
7 A2' 3262 3262 0.00 0.00 0.49 0.00
8 A2' 1038 1038 0.00 0.00 0.73 0.00
9 A2" 3267 3267 153.58 0.00 0.74 0.85
10 A2" 1397 1397 27.75 0.00 0.74 0.85
11 A2" 919 919 6.11 0.00 0.00 0.00
12 E' 3271 3271 90.24 114.62 0.75 0.86
12 E' 3271 3271 90.24 114.62 0.75 0.86
13 E' 3208 3208 93.26 0.51 0.75 0.86
13 E' 3208 3208 93.26 0.51 0.75 0.86
14 E' 1643 1643 0.05 7.72 0.75 0.86
14 E' 1643 1643 0.05 7.72 0.75 0.86
15 E' 1392 1392 0.30 5.98 0.75 0.86
15 E' 1392 1392 0.30 5.98 0.75 0.86
16 E' 1212 1212 0.72 3.06 0.75 0.86
16 E' 1212 1212 0.72 3.06 0.75 0.86
17 E' 974 974 0.53 4.47 0.75 0.86
17 E' 974 974 0.53 4.47 0.75 0.86
18 E' 586 586 0.30 0.36 0.75 0.86
18 E' 586 586 0.30 0.36 0.75 0.86
19 E" 1325 1325 0.00 0.86 0.75 0.86
19 E" 1325 1325 0.00 0.86 0.75 0.86
20 E" 1275 1275 0.00 1.97 0.75 0.86
20 E" 1275 1275 0.00 1.97 0.75 0.86
21 E" 1120 1120 0.00 26.73 0.75 0.86
21 E" 1120 1120 0.00 26.73 0.75 0.86
22 E" 855 855 0.00 8.28 0.75 0.86
22 E" 855 855 0.00 8.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27532.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 27532.7 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 CBS-Q
ABC
0.24012 0.24012 0.20793

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.937
C2 0.000 1.233 0.000
C3 1.068 -0.616 0.000
C4 -1.068 -0.616 0.000
C5 0.000 0.000 -0.937
H6 0.000 0.000 2.022
H7 0.000 0.000 -2.022
H8 0.896 1.849 0.000
H9 -0.896 1.849 0.000
H10 1.153 -1.700 0.000
H11 2.049 -0.149 0.000
H12 -2.049 -0.149 0.000
H13 -1.153 -1.700 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54831.54831.54831.87361.08502.95862.25792.25792.25792.25792.25792.2579
C21.54832.13512.13511.54832.36802.36801.08711.08713.15142.47112.47113.1514
C31.54832.13512.13511.54832.36802.36802.47113.15141.08711.08713.15142.4711
C41.54832.13512.13511.54832.36802.36803.15142.47112.47113.15141.08711.0871
C51.87361.54831.54831.54832.95861.08502.25792.25792.25792.25792.25792.2579
H61.08502.36802.36802.36802.95864.04362.88242.88242.88242.88242.88242.8824
H72.95862.36802.36802.36801.08504.04362.88242.88242.88242.88242.88242.8824
H82.25791.08712.47113.15142.25792.88242.88241.79143.55822.30653.55824.0979
H92.25791.08713.15142.47112.25792.88242.88241.79144.09793.55822.30653.5582
H102.25793.15141.08712.47112.25792.88242.88243.55824.09791.79143.55822.3065
H112.25792.47111.08713.15142.25792.88242.88242.30653.55821.79144.09793.5582
H122.25792.47113.15141.08712.25792.88242.88243.55822.30653.55824.09791.7914
H132.25793.15142.47111.08712.25792.88242.88244.09793.55822.30653.55821.7914

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 74.467 C1 C2 H8 116.821
C1 C2 H9 116.821 C1 C3 C5 74.467
C1 C3 H10 116.821 C1 C3 H11 116.821
C1 C4 C5 74.467 C1 C4 H12 116.821
C1 C4 H13 116.821 C2 C1 C3 87.183
C2 C1 C4 87.183 C2 C1 H6 127.233
C2 C5 C3 87.183 C2 C5 C4 87.183
C2 C5 H7 127.233 C3 C1 C4 87.183
C3 C1 H6 127.233 C3 C5 C4 87.183
C3 C5 H7 127.233 C4 C1 H6 127.233
C4 C5 H7 127.233 C5 C2 H8 116.821
C5 C2 H9 116.821 C5 C3 H10 116.821
C5 C3 H11 116.821 C5 C4 H12 116.821
C5 C4 H13 116.821 H8 C2 H9 110.956
H10 C3 H11 110.956 H12 C4 H13 110.956
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability