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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-194.697405
Energy at 298.15K 
HF Energy-193.918115
Nuclear repulsion energy179.305994
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' 3168 3005        
2 A1' 3107 2947        
3 A1' 1596 1514        
4 A1' 1145 1086        
5 A1' 928 880        
6 A1" 1018 965        
7 A2' 3168 3005        
8 A2' 984 933        
9 A2" 3162 2999        
10 A2" 1288 1222        
11 A2" 863 818        
12 E' 3175 3011        
12 E' 3175 3011        
13 E' 3102 2942        
13 E' 3101 2942        
14 E' 1548 1468        
14 E' 1547 1468        
15 E' 1291 1224        
15 E' 1291 1224        
16 E' 1139 1080        
16 E' 1139 1080        
17 E' 921 874        
17 E' 921 874        
18 E' 551 523        
18 E' 550 522        
19 E" 1239 1175        
19 E" 1239 1175        
20 E" 1175 1114        
20 E" 1175 1114        
21 E" 1050 996        
21 E" 1050 996        
22 E" 809 767        
22 E" 809 767        

Unscaled Zero Point Vibrational Energy (zpe) 26210.8 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 24861.0 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 CCSD(T)/6-31G**
ABC
0.24058 0.24058 0.20830

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 1.239 0.000
C3 1.073 -0.619 0.000
C4 -1.073 -0.619 0.000
C5 0.000 0.000 -0.942
H6 0.000 0.000 2.032
H7 0.000 0.000 -2.032
H8 0.904 1.853 0.000
H9 -0.904 1.853 0.000
H10 1.153 -1.709 0.000
H11 2.056 -0.144 0.000
H12 -2.056 -0.144 0.000
H13 -1.153 -1.709 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55601.55601.55601.88351.09002.97352.26632.26632.26632.26632.26632.2663
C21.55602.14552.14551.55602.37962.37961.09241.09243.16492.47792.47793.1649
C31.55602.14552.14551.55602.37962.37962.47793.16491.09241.09243.16492.4779
C41.55602.14552.14551.55602.37962.37963.16492.47792.47793.16491.09241.0924
C51.88351.55601.55601.55602.97351.09002.26632.26632.26632.26632.26632.2663
H61.09002.37962.37962.37962.97354.06352.89432.89432.89432.89432.89432.8943
H72.97352.37962.37962.37961.09004.06352.89432.89432.89432.89432.89432.8943
H82.26631.09242.47793.16492.26632.89432.89431.80703.57032.30553.57034.1126
H92.26631.09243.16492.47792.26632.89432.89431.80704.11263.57032.30553.5703
H102.26633.16491.09242.47792.26632.89432.89433.57034.11261.80703.57032.3055
H112.26632.47791.09243.16492.26632.89432.89432.30553.57031.80704.11263.5703
H122.26632.47793.16491.09242.26632.89432.89433.57032.30553.57034.11261.8070
H132.26633.16492.47791.09242.26632.89432.89434.11263.57032.30553.57031.8070

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 74.489 C1 C2 H8 116.582
C1 C2 H9 116.582 C1 C3 C5 74.489
C1 C3 H10 116.582 C1 C3 H11 116.582
C1 C4 C5 74.489 C1 C4 H12 116.582
C1 C4 H13 116.582 C2 C1 C3 87.166
C2 C1 C4 87.166 C2 C1 H6 127.245
C2 C5 C3 87.166 C2 C5 C4 87.166
C2 C5 H7 127.245 C3 C1 C4 87.166
C3 C1 H6 127.245 C3 C5 C4 87.166
C3 C5 H7 127.245 C4 C1 H6 127.245
C4 C5 H7 127.245 C5 C2 H8 116.582
C5 C2 H9 116.582 C5 C3 H10 116.582
C5 C3 H11 116.582 C5 C4 H12 116.582
C5 C4 H13 116.582 H8 C2 H9 111.597
H10 C3 H11 111.597 H12 C4 H13 111.597
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability