return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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-194.266726
Energy at 298.15K 
HF Energy-193.810903
Nuclear repulsion energy176.509751
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 3026 0.00      
2 A1' 3087 2954 0.00      
3 A1' 1600 1531 0.00      
4 A1' 1133 1084 0.00      
5 A1' 938 897 0.00      
6 A1" 1018 974 0.00      
7 A2' 3157 3021 0.00      
8 A2' 985 943 0.00      
9 A2" 3149 3013 104.41      
10 A2" 1276 1221 30.64      
11 A2" 816 781 4.23      
12 E' 3165 3028 59.52      
12 E' 3165 3028 59.52      
13 E' 3083 2950 61.58      
13 E' 3083 2950 61.58      
14 E' 1556 1489 0.31      
14 E' 1556 1489 0.31      
15 E' 1256 1202 1.42      
15 E' 1256 1202 1.42      
16 E' 1134 1085 0.25      
16 E' 1134 1085 0.25      
17 E' 883 845 1.18      
17 E' 883 845 1.18      
18 E' 551 527 0.11      
18 E' 551 527 0.11      
19 E" 1269 1214 0.00      
19 E" 1269 1214 0.00      
20 E" 1166 1116 0.00      
20 E" 1166 1116 0.00      
21 E" 1066 1020 0.00      
21 E" 1066 1020 0.00      
22 E" 762 729 0.00      
22 E" 762 729 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26050.5 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 24925.1 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
0.23255 0.23255 0.20166

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 0.961
C2 0.000 1.262 0.000
C3 1.093 -0.631 0.000
C4 -1.093 -0.631 0.000
C5 0.000 0.000 -0.961
H6 0.000 0.000 2.055
H7 0.000 0.000 -2.055
H8 0.910 1.876 0.000
H9 -0.910 1.876 0.000
H10 1.170 -1.726 0.000
H11 2.079 -0.150 0.000
H12 -2.079 -0.150 0.000
H13 -1.170 -1.726 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.58631.58631.58631.92261.09413.01672.29562.29562.29562.29562.29562.2956
C21.58632.18552.18551.58632.41182.41181.09741.09743.20822.51332.51333.2082
C31.58632.18552.18551.58632.41182.41182.51333.20821.09741.09743.20822.5133
C41.58632.18552.18551.58632.41182.41183.20822.51332.51333.20821.09741.0974
C51.92261.58631.58631.58633.01671.09412.29562.29562.29562.29562.29562.2956
H61.09412.41182.41182.41183.01674.11082.92752.92752.92752.92752.92752.9275
H73.01672.41182.41182.41181.09414.11082.92752.92752.92752.92752.92752.9275
H82.29561.09742.51333.20822.29562.92752.92751.81923.61072.33933.61074.1585
H92.29561.09743.20822.51332.29562.92752.92751.81924.15853.61072.33933.6107
H102.29563.20821.09742.51332.29562.92752.92753.61074.15851.81923.61072.3393
H112.29562.51331.09743.20822.29562.92752.92752.33933.61071.81924.15853.6107
H122.29562.51333.20821.09742.29562.92752.92753.61072.33933.61074.15851.8192
H132.29563.20822.51331.09742.29562.92752.92754.15853.61072.33933.61071.8192

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 74.606 C1 C2 H8 116.425
C1 C2 H9 116.425 C1 C3 C5 74.606
C1 C3 H10 116.425 C1 C3 H11 116.425
C1 C4 C5 74.606 C1 C4 H12 116.425
C1 C4 H13 116.425 C2 C1 C3 87.082
C2 C1 C4 87.082 C2 C1 H6 127.303
C2 C5 C3 87.082 C2 C5 C4 87.082
C2 C5 H7 127.303 C3 C1 C4 87.082
C3 C1 H6 127.303 C3 C5 C4 87.082
C3 C5 H7 127.303 C4 C1 H6 127.303
C4 C5 H7 127.303 C5 C2 H8 116.425
C5 C2 H9 116.425 C5 C3 H10 116.425
C5 C3 H11 116.425 C5 C4 H12 116.425
C5 C4 H13 116.425 H8 C2 H9 111.961
H10 C3 H11 111.961 H12 C4 H13 111.961
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability