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

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-194.822585
Energy at 298.15K 
HF Energy-193.974380
Nuclear repulsion energy180.003978
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/Def2TZVPP
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' 3159 3006 0.00      
2 A1' 3091 2941 0.00      
3 A1' 1559 1483 0.00      
4 A1' 1138 1083 0.00      
5 A1' 908 864 0.00      
6 A1" 1011 962 0.00      
7 A2' 3164 3011 0.00      
8 A2' 968 921 0.00      
9 A2" 3155 3002 99.07      
10 A2" 1250 1189 40.92      
11 A2" 864 822 4.67      
12 E' 3168 3014 50.54      
12 E' 3168 3014 50.54      
13 E' 3088 2938 67.24      
13 E' 3088 2938 67.24      
14 E' 1508 1434 0.72      
14 E' 1508 1434 0.72      
15 E' 1269 1207 2.86      
15 E' 1269 1207 2.86      
16 E' 1121 1066 0.45      
16 E' 1121 1066 0.45      
17 E' 923 878 0.42      
17 E' 923 878 0.42      
18 E' 538 512 0.12      
18 E' 538 512 0.12      
19 E" 1218 1159 0.00      
19 E" 1218 1159 0.00      
20 E" 1148 1092 0.00      
20 E" 1148 1092 0.00      
21 E" 1035 985 0.00      
21 E" 1035 985 0.00      
22 E" 809 770 0.00      
22 E" 809 770 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25956.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 24697.9 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/Def2TZVPP
ABC
0.24254 0.24254 0.20999

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.938
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 -0.938
H6 0.000 0.000 2.025
H7 0.000 0.000 -2.025
H8 0.904 1.841 0.000
H9 -0.904 1.841 0.000
H10 1.143 -1.704 0.000
H11 2.047 -0.138 0.000
H12 -2.047 -0.138 0.000
H13 -1.143 -1.704 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54991.54991.54991.87541.08702.96242.25572.25572.25572.25572.25572.2557
C21.54992.13752.13751.54992.37112.37111.08941.08943.15232.46402.46403.1523
C31.54992.13752.13751.54992.37112.37112.46403.15231.08941.08943.15232.4640
C41.54992.13752.13751.54992.37112.37113.15232.46402.46403.15231.08941.0894
C51.87541.54991.54991.54992.96241.08702.25572.25572.25572.25572.25572.2557
H61.08702.37112.37112.37112.96244.04932.88242.88242.88242.88242.88242.8824
H72.96242.37112.37112.37111.08704.04932.88242.88242.88242.88242.88242.8824
H82.25571.08942.46403.15232.25572.88242.88241.80873.55342.28523.55344.0938
H92.25571.08943.15232.46402.25572.88242.88241.80874.09383.55342.28523.5534
H102.25573.15231.08942.46402.25572.88242.88243.55344.09381.80873.55342.2852
H112.25572.46401.08943.15232.25572.88242.88242.28523.55341.80874.09383.5534
H122.25572.46403.15231.08942.25572.88242.88243.55342.28523.55344.09381.8087
H132.25573.15232.46401.08942.25572.88242.88244.09383.55342.28523.55341.8087

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 74.458 C1 C2 H8 116.355
C1 C2 H9 116.355 C1 C3 C5 74.458
C1 C3 H10 116.355 C1 C3 H11 116.355
C1 C4 C5 74.458 C1 C4 H12 116.355
C1 C4 H13 116.355 C2 C1 C3 87.189
C2 C1 C4 87.189 C2 C1 H6 127.229
C2 C5 C3 87.189 C2 C5 C4 87.189
C2 C5 H7 127.229 C3 C1 C4 87.189
C3 C1 H6 127.229 C3 C5 C4 87.189
C3 C5 H7 127.229 C4 C1 H6 127.229
C4 C5 H7 127.229 C5 C2 H8 116.355
C5 C2 H9 116.355 C5 C3 H10 116.355
C5 C3 H11 116.355 C5 C4 H12 116.355
C5 C4 H13 116.355 H8 C2 H9 112.228
H10 C3 H11 112.228 H12 C4 H13 112.228
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability