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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-194.582326
Energy at 298.15K 
HF Energy-193.905024
Nuclear repulsion energy179.974547
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=FULL/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' 3165 2982 0.00      
2 A1' 3111 2932 0.00      
3 A1' 1606 1514 0.00      
4 A1' 1165 1097 0.00      
5 A1' 930 876 0.00      
6 A1" 1023 964 0.00      
7 A2' 3179 2995 0.00      
8 A2' 1000 942 0.00      
9 A2" 3161 2978 106.40      
10 A2" 1293 1218 36.62      
11 A2" 882 831 4.63      
12 E' 3183 2999 54.55      
12 E' 3183 2999 54.55      
13 E' 3108 2929 60.35      
13 E' 3108 2929 60.35      
14 E' 1555 1465 0.15      
14 E' 1555 1465 0.15      
15 E' 1296 1221 2.32      
15 E' 1296 1221 2.32      
16 E' 1147 1081 0.23      
16 E' 1147 1081 0.23      
17 E' 940 886 0.45      
17 E' 940 886 0.45      
18 E' 564 532 0.26      
18 E' 564 532 0.26      
19 E" 1247 1175 0.00      
19 E" 1247 1175 0.00      
20 E" 1177 1109 0.00      
20 E" 1177 1109 0.00      
21 E" 1053 992 0.00      
21 E" 1053 992 0.00      
22 E" 830 782 0.00      
22 E" 830 782 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26358.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 24834.9 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=FULL/6-31G*
ABC
0.24271 0.24271 0.21001

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.936
C2 0.000 1.232 0.000
C3 1.067 -0.616 0.000
C4 -1.067 -0.616 0.000
C5 0.000 0.000 -0.936
H6 0.000 0.000 2.030
H7 0.000 0.000 -2.030
H8 0.905 1.849 0.000
H9 -0.905 1.849 0.000
H10 1.148 -1.708 0.000
H11 2.053 -0.141 0.000
H12 -2.053 -0.141 0.000
H13 -1.148 -1.708 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54721.54721.54721.87161.09382.96532.26102.26102.26102.26102.26102.2610
C21.54722.13412.13411.54722.37432.37431.09501.09503.15652.47002.47003.1565
C31.54722.13412.13411.54722.37432.37432.47003.15651.09501.09503.15652.4700
C41.54722.13412.13411.54722.37432.37433.15652.47002.47003.15651.09501.0950
C51.87161.54721.54721.54722.96531.09382.26102.26102.26102.26102.26102.2610
H61.09382.37432.37432.37432.96534.05912.89062.89062.89062.89062.89062.8906
H72.96532.37432.37432.37431.09384.05912.89062.89062.89062.89062.89062.8906
H82.26101.09502.47003.15652.26102.89062.89061.80993.56502.29703.56504.1069
H92.26101.09503.15652.47002.26102.89062.89061.80994.10693.56502.29703.5650
H102.26103.15651.09502.47002.26102.89062.89063.56504.10691.80993.56502.2970
H112.26102.47001.09503.15652.26102.89062.89062.29703.56501.80994.10693.5650
H122.26102.47003.15651.09502.26102.89062.89063.56502.29703.56504.10691.8099
H132.26103.15652.47001.09502.26102.89062.89064.10693.56502.29703.56501.8099

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 74.432 C1 C2 H8 116.638
C1 C2 H9 116.638 C1 C3 C5 74.432
C1 C3 H10 116.638 C1 C3 H11 116.638
C1 C4 C5 74.432 C1 C4 H12 116.638
C1 C4 H13 116.638 C2 C1 C3 87.208
C2 C1 C4 87.208 C2 C1 H6 127.216
C2 C5 C3 87.208 C2 C5 C4 87.208
C2 C5 H7 127.216 C3 C1 C4 87.208
C3 C1 H6 127.216 C3 C5 C4 87.208
C3 C5 H7 127.216 C4 C1 H6 127.216
C4 C5 H7 127.216 C5 C2 H8 116.638
C5 C2 H9 116.638 C5 C3 H10 116.638
C5 C3 H11 116.638 C5 C4 H12 116.638
C5 C4 H13 116.638 H8 C2 H9 111.472
H10 C3 H11 111.472 H12 C4 H13 111.472
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability