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

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at G3
 hartrees
Energy at 0K-195.072048
Energy at 298.15K-195.067070
HF Energy-193.905681
Nuclear repulsion energy180.476234
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 HF/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' 3293 3102 0.00 309.77 0.15 0.25
2 A1' 3231 3044 0.00 289.18 0.33 0.49
3 A1' 1706 1607 0.00 6.04 0.74 0.85
4 A1' 1206 1136 0.00 32.63 0.00 0.00
5 A1' 989 932 0.00 9.53 0.03 0.06
6 A1" 1093 1030 0.00 0.00 0.48 0.65
7 A2' 3274 3084 0.00 0.00 0.00 0.00
8 A2' 1049 989 0.00 0.00 0.74 0.85
9 A2" 3284 3095 150.40 0.00 0.74 0.85
10 A2" 1410 1328 27.54 0.00 0.00 0.00
11 A2" 926 873 5.94 0.00 0.00 0.00
12 E' 3283 3093 92.64 114.18 0.75 0.86
12 E' 3283 3093 92.64 114.18 0.75 0.86
13 E' 3223 3037 90.38 0.54 0.75 0.86
13 E' 3223 3037 90.38 0.54 0.75 0.86
14 E' 1655 1560 0.11 7.87 0.75 0.86
14 E' 1655 1560 0.11 7.87 0.75 0.86
15 E' 1402 1321 0.27 6.13 0.75 0.86
15 E' 1402 1321 0.27 6.13 0.75 0.86
16 E' 1221 1150 0.93 3.12 0.75 0.86
16 E' 1221 1150 0.93 3.12 0.75 0.86
17 E' 979 922 0.64 4.68 0.75 0.86
17 E' 979 922 0.64 4.68 0.75 0.86
18 E' 591 557 0.25 0.41 0.75 0.86
18 E' 591 557 0.25 0.41 0.75 0.86
19 E" 1342 1264 0.00 0.94 0.75 0.86
19 E" 1342 1264 0.00 0.94 0.75 0.86
20 E" 1285 1211 0.00 2.00 0.75 0.86
20 E" 1285 1211 0.00 2.00 0.75 0.86
21 E" 1131 1065 0.00 28.27 0.75 0.86
21 E" 1131 1065 0.00 28.27 0.75 0.86
22 E" 860 811 0.00 8.31 0.75 0.86
22 E" 860 811 0.00 8.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 27700.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 26099.4 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 74.450 C1 C2 H8 116.813
C1 C2 H9 116.813 C1 C3 C5 74.450
C1 C3 H10 116.813 C1 C3 H11 116.813
C1 C4 C5 74.450 C1 C4 H12 116.813
C1 C4 H13 116.813 C2 C1 C3 87.195
C2 C1 C4 87.195 C2 C1 H6 127.225
C2 C5 C3 87.195 C2 C5 C4 87.195
C2 C5 H7 127.225 C3 C1 C4 87.195
C3 C1 H6 127.225 C3 C5 C4 87.195
C3 C5 H7 127.225 C4 C1 H6 127.225
C4 C5 H7 127.225 C5 C2 H8 116.813
C5 C2 H9 116.813 C5 C3 H10 116.813
C5 C3 H11 116.813 C5 C4 H12 116.813
C5 C4 H13 116.813 H8 C2 H9 110.987
H10 C3 H11 110.987 H12 C4 H13 110.987
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability