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

using model chemistry: QCISD(T)/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at QCISD(T)/6-311G*
 hartrees
Energy at 0K-194.702465
Energy at 298.15K 
HF Energy-193.935735
Nuclear repulsion energy178.544749
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 QCISD(T)/6-311G*
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' 3093 2977        
2 A1' 3034 2922        
3 A1' 1566 1508        
4 A1' 1134 1092        
5 A1' 920 885        
6 A1" 997 959        
7 A2' 3092 2977        
8 A2' 965 929        
9 A2" 3087 2972        
10 A2" 1255 1209        
11 A2" 849 818        
12 E' 3099 2984        
12 E' 3099 2984        
13 E' 3029 2916        
13 E' 3029 2916        
14 E' 1516 1460        
14 E' 1516 1459        
15 E' 1254 1207        
15 E' 1254 1207        
16 E' 1118 1077        
16 E' 1118 1076        
17 E' 904 870        
17 E' 904 870        
18 E' 551 531        
18 E' 550 530        
19 E" 1208 1163        
19 E" 1208 1163        
20 E" 1147 1104        
20 E" 1147 1104        
21 E" 1023 985        
21 E" 1023 985        
22 E" 796 766        
22 E" 796 766        

Unscaled Zero Point Vibrational Energy (zpe) 25638.8 cm-1
Scaled (by 0.9628) Zero Point Vibrational Energy (zpe) 24685.0 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 QCISD(T)/6-311G*
ABC
0.23858 0.23858 0.20670

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.946
C2 0.000 1.243 0.000
C3 1.076 -0.622 0.000
C4 -1.076 -0.622 0.000
C5 0.000 0.000 -0.946
H6 0.000 0.000 2.043
H7 0.000 0.000 -2.043
H8 0.908 1.861 0.000
H9 -0.908 1.861 0.000
H10 1.158 -1.717 0.000
H11 2.066 -0.144 0.000
H12 -2.066 -0.144 0.000
H13 -1.158 -1.717 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56191.56191.56191.89161.09702.98862.27672.27672.27672.27672.27672.2767
C21.56192.15302.15301.56192.39122.39121.09871.09873.17852.48832.48833.1785
C31.56192.15302.15301.56192.39122.39122.48833.17851.09871.09873.17852.4883
C41.56192.15302.15301.56192.39122.39123.17852.48832.48833.17851.09871.0987
C51.89161.56191.56191.56192.98861.09702.27672.27672.27672.27672.27672.2767
H61.09702.39122.39122.39122.98864.08562.90892.90892.90892.90892.90892.9089
H72.98862.39122.39122.39121.09704.08562.90892.90892.90892.90892.90892.9089
H82.27671.09872.48833.17852.27672.90892.90891.81683.58702.31513.58704.1319
H92.27671.09873.17852.48832.27672.90892.90891.81684.13193.58702.31513.5870
H102.27673.17851.09872.48832.27672.90892.90893.58704.13191.81683.58702.3151
H112.27672.48831.09873.17852.27672.90892.90892.31513.58701.81684.13193.5870
H122.27672.48833.17851.09872.27672.90892.90893.58702.31513.58704.13191.8168
H132.27673.17852.48831.09872.27672.90892.90894.13193.58702.31513.58701.8168

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 74.535 C1 C2 H8 116.595
C1 C2 H9 116.595 C1 C3 C5 74.535
C1 C3 H10 116.595 C1 C3 H11 116.595
C1 C4 C5 74.535 C1 C4 H12 116.595
C1 C4 H13 116.595 C2 C1 C3 87.133
C2 C1 C4 87.133 C2 C1 H6 127.268
C2 C5 C3 87.133 C2 C5 C4 87.133
C2 C5 H7 127.268 C3 C1 C4 87.133
C3 C1 H6 127.268 C3 C5 C4 87.133
C3 C5 H7 127.268 C4 C1 H6 127.268
C4 C5 H7 127.268 C5 C2 H8 116.595
C5 C2 H9 116.595 C5 C3 H10 116.595
C5 C3 H11 116.595 C5 C4 H12 116.595
C5 C4 H13 116.595 H8 C2 H9 111.536
H10 C3 H11 111.536 H12 C4 H13 111.536
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability