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

using model chemistry: MP2=FULL/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-194.776957
Energy at 298.15K 
HF Energy-193.929131
Nuclear repulsion energy180.474353
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(2df,p)
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' 3182 2991 0.00      
2 A1' 3122 2934 0.00      
3 A1' 1577 1482 0.00      
4 A1' 1158 1089 0.00      
5 A1' 921 866 0.00      
6 A1" 1028 967 0.00      
7 A2' 3196 3003 0.00      
8 A2' 974 915 0.00      
9 A2" 3178 2987 86.62      
10 A2" 1273 1197 31.88      
11 A2" 887 834 4.38      
12 E' 3200 3007 41.06      
12 E' 3200 3007 41.06      
13 E' 3119 2931 54.02      
13 E' 3119 2931 54.02      
14 E' 1522 1431 0.26      
14 E' 1522 1431 0.26      
15 E' 1294 1216 2.00      
15 E' 1294 1216 2.00      
16 E' 1134 1066 0.30      
16 E' 1134 1066 0.30      
17 E' 949 892 0.26      
17 E' 949 892 0.26      
18 E' 551 518 0.28      
18 E' 551 518 0.28      
19 E" 1235 1160 0.00      
19 E" 1235 1160 0.00      
20 E" 1171 1101 0.00      
20 E" 1171 1101 0.00      
21 E" 1049 986 0.00      
21 E" 1049 986 0.00      
22 E" 837 787 0.00      
22 E" 837 787 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26307.0 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 24726.0 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=FULL/6-31G(2df,p)
ABC
0.24396 0.24396 0.21117

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.934
C2 0.000 1.230 0.000
C3 1.065 -0.615 0.000
C4 -1.065 -0.615 0.000
C5 0.000 0.000 -0.934
H6 0.000 0.000 2.021
H7 0.000 0.000 -2.021
H8 0.903 1.840 0.000
H9 -0.903 1.840 0.000
H10 1.142 -1.702 0.000
H11 2.045 -0.138 0.000
H12 -2.045 -0.138 0.000
H13 -1.142 -1.702 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.54431.54431.54431.86851.08722.95572.25232.25232.25232.25232.25232.2523
C21.54432.12982.12981.54432.36612.36611.08991.08993.14612.45982.45983.1461
C31.54432.12982.12981.54432.36612.36612.45983.14611.08991.08993.14612.4598
C41.54432.12982.12981.54432.36612.36613.14612.45982.45983.14611.08991.0899
C51.86851.54431.54431.54432.95571.08722.25232.25232.25232.25232.25232.2523
H61.08722.36612.36612.36612.95574.04302.87862.87862.87862.87862.87862.8786
H72.95572.36612.36612.36611.08724.04302.87862.87862.87862.87862.87862.8786
H82.25231.08992.45983.14612.25232.87862.87861.80643.54962.28313.54964.0895
H92.25231.08993.14612.45982.25232.87862.87861.80644.08953.54962.28313.5496
H102.25233.14611.08992.45982.25232.87862.87863.54964.08951.80643.54962.2831
H112.25232.45981.08993.14612.25232.87862.87862.28313.54961.80644.08953.5496
H122.25232.45983.14611.08992.25232.87862.87863.54962.28313.54964.08951.8064
H132.25233.14612.45981.08992.25232.87862.87864.08953.54962.28313.54961.8064

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 74.453 C1 C2 H8 116.463
C1 C2 H9 116.463 C1 C3 C5 74.453
C1 C3 H10 116.463 C1 C3 H11 116.463
C1 C4 C5 74.453 C1 C4 H12 116.463
C1 C4 H13 116.463 C2 C1 C3 87.193
C2 C1 C4 87.193 C2 C1 H6 127.226
C2 C5 C3 87.193 C2 C5 C4 87.193
C2 C5 H7 127.226 C3 C1 C4 87.193
C3 C1 H6 127.226 C3 C5 C4 87.193
C3 C5 H7 127.226 C4 C1 H6 127.226
C4 C5 H7 127.226 C5 C2 H8 116.463
C5 C2 H9 116.463 C5 C3 H10 116.463
C5 C3 H11 116.463 C5 C4 H12 116.463
C5 C4 H13 116.463 H8 C2 H9 111.936
H10 C3 H11 111.936 H12 C4 H13 111.936
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability