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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-194.261297
Energy at 298.15K 
HF Energy-193.825733
Nuclear repulsion energy174.818617
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/LANL2DZ
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' 3147 3031 0.00      
2 A1' 3061 2948 0.00      
3 A1' 1566 1509 0.00      
4 A1' 1106 1065 0.00      
5 A1' 905 872 0.00      
6 A1" 989 952 0.00      
7 A2' 3137 3021 0.00      
8 A2' 970 934 0.00      
9 A2" 3137 3021 106.79      
10 A2" 1239 1193 40.61      
11 A2" 794 765 10.13      
12 E' 3146 3030 67.65      
12 E' 3146 3030 67.65      
13 E' 3056 2943 89.92      
13 E' 3056 2943 89.92      
14 E' 1530 1474 1.75      
14 E' 1530 1474 1.75      
15 E' 1221 1176 0.21      
15 E' 1221 1176 0.21      
16 E' 1109 1068 0.09      
16 E' 1109 1068 0.09      
17 E' 864 832 3.55      
17 E' 864 832 3.55      
18 E' 541 521 0.30      
18 E' 541 521 0.30      
19 E" 1230 1184 0.00      
19 E" 1230 1184 0.00      
20 E" 1123 1081 0.00      
20 E" 1123 1081 0.00      
21 E" 1028 990 0.00      
21 E" 1028 990 0.00      
22 E" 760 732 0.00      
22 E" 760 732 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25632.9 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 24687.0 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 MP2/LANL2DZ
ABC
0.22784 0.22784 0.19791

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.973
C2 0.000 1.275 0.000
C3 1.104 -0.637 0.000
C4 -1.104 -0.637 0.000
C5 0.000 0.000 -0.973
H6 0.000 0.000 2.072
H7 0.000 0.000 -2.072
H8 0.916 1.891 0.000
H9 -0.916 1.891 0.000
H10 1.179 -1.739 0.000
H11 2.095 -0.152 0.000
H12 -2.095 -0.152 0.000
H13 -1.179 -1.739 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.60381.60381.60381.94691.09903.04592.31552.31552.31552.31552.31552.3155
C21.60382.20772.20771.60382.43302.43301.10391.10393.23582.53502.53503.2358
C31.60382.20772.20771.60382.43302.43302.53503.23581.10391.10393.23582.5350
C41.60382.20772.20771.60382.43302.43303.23582.53502.53503.23581.10391.1039
C51.94691.60381.60381.60383.04591.09902.31552.31552.31552.31552.31552.3155
H61.09902.43302.43302.43303.04594.14492.95112.95112.95112.95112.95112.9511
H73.04592.43302.43302.43301.09904.14492.95112.95112.95112.95112.95112.9511
H82.31551.10392.53503.23582.31552.95112.95111.83193.63892.35893.63894.1908
H92.31551.10393.23582.53502.31552.95112.95111.83194.19083.63892.35893.6389
H102.31553.23581.10392.53502.31552.95112.95113.63894.19081.83193.63892.3589
H112.31552.53501.10393.23582.31552.95112.95112.35893.63891.83194.19083.6389
H122.31552.53503.23581.10392.31552.95112.95113.63892.35893.63894.19081.8319
H132.31553.23582.53501.10392.31552.95112.95114.19083.63892.35893.63891.8319

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 74.739 C1 C2 H8 116.332
C1 C2 H9 116.332 C1 C3 C5 74.739
C1 C3 H10 116.332 C1 C3 H11 116.332
C1 C4 C5 74.739 C1 C4 H12 116.332
C1 C4 H13 116.332 C2 C1 C3 86.986
C2 C1 C4 86.986 C2 C1 H6 127.370
C2 C5 C3 86.986 C2 C5 C4 86.986
C2 C5 H7 127.370 C3 C1 C4 86.986
C3 C1 H6 127.370 C3 C5 C4 86.986
C3 C5 H7 127.370 C4 C1 H6 127.370
C4 C5 H7 127.370 C5 C2 H8 116.332
C5 C2 H9 116.332 C5 C3 H10 116.332
C5 C3 H11 116.332 C5 C4 H12 116.332
C5 C4 H13 116.332 H8 C2 H9 112.145
H10 C3 H11 112.145 H12 C4 H13 112.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability