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: MP4/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP4/6-311G**
 hartrees
Energy at 0K-194.767636
Energy at 298.15K 
HF Energy-193.948510
Nuclear repulsion energy178.673399
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 MP4/6-311G**
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' 3113 3019        
2 A1' 3053 2960        
3 A1' 1561 1514        
4 A1' 1133 1098        
5 A1' 914 886        
6 A1" 1001 970        
7 A2' 3117 3023        
8 A2' 968 939        
9 A2" 3108 3014        
10 A2" 1259 1221        
11 A2" 848 823        
12 E' 3123 3028        
12 E' 3123 3028        
13 E' 3048 2956        
13 E' 3048 2956        
14 E' 1514 1468        
14 E' 1513 1467        
15 E' 1261 1223        
15 E' 1261 1223        
16 E' 1120 1086        
16 E' 1119 1085        
17 E' 906 878        
17 E' 906 878        
18 E' 544 528        
18 E' 544 527        
19 E" 1212 1176        
19 E" 1212 1176        
20 E" 1148 1113        
20 E" 1148 1113        
21 E" 1025 994        
21 E" 1025 994        
22 E" 798 773        
22 E" 798 773        

Unscaled Zero Point Vibrational Energy (zpe) 25734.5 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 24954.8 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 MP4/6-311G**
ABC
0.23892 0.23892 0.20702

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-311G**

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.945
C2 0.000 1.243 0.000
C3 1.076 -0.621 0.000
C4 -1.076 -0.621 0.000
C5 0.000 0.000 -0.945
H6 0.000 0.000 2.041
H7 0.000 0.000 -2.041
H8 0.910 1.857 0.000
H9 -0.910 1.857 0.000
H10 1.153 -1.716 0.000
H11 2.063 -0.140 0.000
H12 -2.063 -0.140 0.000
H13 -1.153 -1.716 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56131.56131.56131.89071.09542.98612.27352.27352.27352.27352.27352.2735
C21.56132.15222.15221.56132.38932.38931.09771.09773.17552.48352.48353.1755
C31.56132.15222.15221.56132.38932.38932.48353.17551.09771.09773.17552.4835
C41.56132.15222.15221.56132.38932.38933.17552.48352.48353.17551.09771.0977
C51.89071.56131.56131.56132.98611.09542.27352.27352.27352.27352.27352.2735
H61.09542.38932.38932.38932.98614.08152.90512.90512.90512.90512.90512.9051
H72.98612.38932.38932.38931.09544.08152.90512.90512.90512.90512.90512.9051
H82.27351.09772.48353.17552.27352.90512.90511.81973.58122.30593.58124.1256
H92.27351.09773.17552.48352.27352.90512.90511.81974.12563.58122.30593.5812
H102.27353.17551.09772.48352.27352.90512.90513.58124.12561.81973.58122.3059
H112.27352.48351.09773.17552.27352.90512.90512.30593.58121.81974.12563.5812
H122.27352.48353.17551.09772.27352.90512.90513.58122.30593.58124.12561.8197
H132.27353.17552.48351.09772.27352.90512.90514.12563.58122.30593.58121.8197

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 74.529 C1 C2 H8 116.437
C1 C2 H9 116.437 C1 C3 C5 74.529
C1 C3 H10 116.437 C1 C3 H11 116.437
C1 C4 C5 74.529 C1 C4 H12 116.437
C1 C4 H13 116.437 C2 C1 C3 87.137
C2 C1 C4 87.137 C2 C1 H6 127.265
C2 C5 C3 87.137 C2 C5 C4 87.137
C2 C5 H7 127.265 C3 C1 C4 87.137
C3 C1 H6 127.265 C3 C5 C4 87.137
C3 C5 H7 127.265 C4 C1 H6 127.265
C4 C5 H7 127.265 C5 C2 H8 116.437
C5 C2 H9 116.437 C5 C3 H10 116.437
C5 C3 H11 116.437 C5 C4 H12 116.437
C5 C4 H13 116.437 H8 C2 H9 111.968
H10 C3 H11 111.968 H12 C4 H13 111.968
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability