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

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-194.628889
Energy at 298.15K 
HF Energy-193.904047
Nuclear repulsion energy178.918094
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 CCSD(T)/6-31G*
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' 3117 2999        
2 A1' 3063 2947        
3 A1' 1586 1525        
4 A1' 1144 1100        
5 A1' 928 892        
6 A1" 1007 969        
7 A2' 3118 3000        
8 A2' 982 945        
9 A2" 3112 2994        
10 A2" 1279 1230        
11 A2" 860 828        
12 E' 3124 3006        
12 E' 3124 3006        
13 E' 3058 2942        
13 E' 3058 2942        
14 E' 1537 1479        
14 E' 1537 1478        
15 E' 1279 1230        
15 E' 1279 1230        
16 E' 1134 1091        
16 E' 1133 1091        
17 E' 916 881        
17 E' 916 881        
18 E' 555 534        
18 E' 555 534        
19 E" 1228 1182        
19 E" 1228 1181        
20 E" 1166 1122        
20 E" 1166 1122        
21 E" 1040 1000        
21 E" 1039 1000        
22 E" 806 775        
22 E" 805 775        

Unscaled Zero Point Vibrational Energy (zpe) 25938.9 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 24955.8 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 CCSD(T)/6-31G*
ABC
0.23973 0.23973 0.20750

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.942
C2 0.000 1.240 0.000
C3 1.074 -0.620 0.000
C4 -1.074 -0.620 0.000
C5 0.000 0.000 -0.942
H6 0.000 0.000 2.040
H7 0.000 0.000 -2.040
H8 0.908 1.859 0.000
H9 -0.908 1.859 0.000
H10 1.156 -1.716 0.000
H11 2.064 -0.143 0.000
H12 -2.064 -0.143 0.000
H13 -1.156 -1.716 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55741.55741.55741.88471.09732.98202.27362.27362.27362.27362.27362.2736
C21.55742.14772.14771.55742.38702.38701.09901.09903.17402.48482.48483.1740
C31.55742.14772.14771.55742.38702.38702.48483.17401.09901.09903.17402.4848
C41.55742.14772.14771.55742.38702.38703.17402.48482.48483.17401.09901.0990
C51.88471.55741.55741.55742.98201.09732.27362.27362.27362.27362.27362.2736
H61.09732.38702.38702.38702.98204.07932.90542.90542.90542.90542.90542.9054
H72.98202.38702.38702.38701.09734.07932.90542.90542.90542.90542.90542.9054
H82.27361.09902.48483.17402.27362.90542.90541.81583.58382.31253.58384.1283
H92.27361.09903.17402.48482.27362.90542.90541.81584.12833.58382.31253.5838
H102.27363.17401.09902.48482.27362.90542.90543.58384.12831.81583.58382.3125
H112.27362.48481.09903.17402.27362.90542.90542.31253.58381.81584.12833.5838
H122.27362.48483.17401.09902.27362.90542.90543.58382.31253.58384.12831.8158
H132.27363.17402.48481.09902.27362.90542.90544.12833.58382.31253.58381.8158

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 74.468 C1 C2 H8 116.658
C1 C2 H9 116.658 C1 C3 C5 74.468
C1 C3 H10 116.657 C1 C3 H11 116.658
C1 C4 C5 74.468 C1 C4 H12 116.658
C1 C4 H13 116.657 C2 C1 C3 87.182
C2 C1 C4 87.182 C2 C1 H6 127.234
C2 C5 C3 87.182 C2 C5 C4 87.182
C2 C5 H7 127.234 C3 C1 C4 87.182
C3 C1 H6 127.234 C3 C5 C4 87.182
C3 C5 H7 127.234 C4 C1 H6 127.234
C4 C5 H7 127.234 C5 C2 H8 116.658
C5 C2 H9 116.658 C5 C3 H10 116.657
C5 C3 H11 116.658 C5 C4 H12 116.658
C5 C4 H13 116.657 H8 C2 H9 111.401
H10 C3 H11 111.401 H12 C4 H13 111.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability