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

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-194.557591
Energy at 298.15K 
HF Energy-193.904948
Nuclear repulsion energy179.785845
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 MP2/6-31G*
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' 3163 2983 0.00      
2 A1' 3110 2933 0.00      
3 A1' 1605 1514 0.00      
4 A1' 1163 1096 0.00      
5 A1' 928 875 0.00      
6 A1" 1021 962 0.00      
7 A2' 3178 2996 0.00      
8 A2' 998 942 0.00      
9 A2" 3159 2979 107.02      
10 A2" 1291 1217 36.05      
11 A2" 880 830 4.60      
12 E' 3182 3001 54.77      
12 E' 3182 3001 54.77      
13 E' 3107 2930 60.56      
13 E' 3107 2930 60.56      
14 E' 1554 1465 0.12      
14 E' 1554 1465 0.12      
15 E' 1293 1220 2.20      
15 E' 1293 1220 2.20      
16 E' 1146 1081 0.23      
16 E' 1146 1081 0.23      
17 E' 938 884 0.45      
17 E' 938 884 0.45      
18 E' 562 530 0.25      
18 E' 562 530 0.25      
19 E" 1243 1172 0.00      
19 E" 1243 1172 0.00      
20 E" 1175 1108 0.00      
20 E" 1175 1108 0.00      
21 E" 1050 991 0.00      
21 E" 1050 991 0.00      
22 E" 828 780 0.00      
22 E" 828 780 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26326.6 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 24826.0 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 MP2/6-31G*
ABC
0.24217 0.24217 0.20953

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.937
C2 0.000 1.234 0.000
C3 1.068 -0.617 0.000
C4 -1.068 -0.617 0.000
C5 0.000 0.000 -0.937
H6 0.000 0.000 2.031
H7 0.000 0.000 -2.031
H8 0.905 1.850 0.000
H9 -0.905 1.850 0.000
H10 1.150 -1.709 0.000
H11 2.055 -0.141 0.000
H12 -2.055 -0.141 0.000
H13 -1.150 -1.709 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54921.54921.54921.87381.09422.96802.26302.26302.26302.26302.26302.2630
C21.54922.13692.13691.54922.37642.37641.09531.09533.15962.47262.47263.1596
C31.54922.13692.13691.54922.37642.37642.47263.15961.09531.09533.15962.4726
C41.54922.13692.13691.54922.37642.37643.15962.47262.47263.15961.09531.0953
C51.87381.54921.54921.54922.96801.09422.26302.26302.26302.26302.26302.2630
H61.09422.37642.37642.37642.96804.06212.89282.89282.89282.89282.89282.8928
H72.96802.37642.37642.37641.09424.06212.89282.89282.89282.89282.89282.8928
H82.26301.09532.47263.15962.26302.89282.89281.81063.56792.29963.56794.1102
H92.26301.09533.15962.47262.26302.89282.89281.81064.11023.56792.29963.5679
H102.26303.15961.09532.47262.26302.89282.89283.56794.11021.81063.56792.2996
H112.26302.47261.09533.15962.26302.89282.89282.29963.56791.81064.11023.5679
H122.26302.47263.15961.09532.26302.89282.89283.56792.29963.56794.11021.8106
H132.26303.15962.47261.09532.26302.89282.89284.11023.56792.29963.56791.8106

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 74.426 C1 C2 H8 116.636
C1 C2 H9 116.636 C1 C3 C5 74.426
C1 C3 H10 116.636 C1 C3 H11 116.636
C1 C4 C5 74.426 C1 C4 H12 116.636
C1 C4 H13 116.636 C2 C1 C3 87.212
C2 C1 C4 87.212 C2 C1 H6 127.213
C2 C5 C3 87.212 C2 C5 C4 87.212
C2 C5 H7 127.213 C3 C1 C4 87.212
C3 C1 H6 127.213 C3 C5 C4 87.212
C3 C5 H7 127.213 C4 C1 H6 127.213
C4 C5 H7 127.213 C5 C2 H8 116.636
C5 C2 H9 116.636 C5 C3 H10 116.636
C5 C3 H11 116.636 C5 C4 H12 116.636
C5 C4 H13 116.636 H8 C2 H9 111.481
H10 C3 H11 111.481 H12 C4 H13 111.481
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability