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/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-194.898559
Energy at 298.15K 
HF Energy-193.968756
Nuclear repulsion energy179.243940
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/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 1113 1078        
2 A1' 3117 3021        
3 A1' 3052 2958        
4 A1' 1547 1499        
5 A1' 1123 1089        
6 A1' 906 878        
7 A1" 1003 972        
8 A2' 3118 3022        
9 A2' 956 926        
10 A2" 3110 3014        
11 A2" 1247 1209        
12 A2" 847 821        
12 E' 3122 3026        
13 E' 3122 3026        
13 E' 3048 2954        
14 E' 3048 2954        
14 E' 1498 1452        
15 E' 1498 1452        
15 E' 1261 1222        
16 E' 1261 1222        
16 E' 1113 1079        
17 E' 906 878        
17 E' 906 878        
18 E' 532 516        
18 E' 531 514        
19 E" 1212 1175        
19 E" 1211 1174        
20 E" 1144 1109        
20 E" 1144 1109        
21 E" 1030 998        
21 E" 1029 997        
22 E" 792 768        
22 E" 792 767        

Unscaled Zero Point Vibrational Energy (zpe) 25668.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 24878.3 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/cc-pVTZ
ABC
0.24040 0.24040 0.20814

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/cc-pVTZ

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.942
C2 0.000 1.240 0.000
C3 1.074 -0.620 0.000
C4 -1.074 -0.620 0.000
C5 0.000 0.000 -0.942
H6 0.000 0.000 2.032
H7 0.000 0.000 -2.032
H8 0.906 1.850 0.000
H9 -0.906 1.850 0.000
H10 1.149 -1.709 0.000
H11 2.055 -0.140 0.000
H12 -2.055 -0.140 0.000
H13 -1.149 -1.709 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55721.55721.55721.88441.08962.97402.26492.26492.26492.26492.26492.2649
C21.55722.14752.14751.55722.38022.38021.09211.09213.16522.47532.47533.1652
C31.55722.14752.14751.55722.38022.38022.47533.16521.09211.09213.16522.4753
C41.55722.14752.14751.55722.38022.38023.16522.47532.47533.16521.09211.0921
C51.88441.55721.55721.55722.97401.08962.26492.26492.26492.26492.26492.2649
H61.08962.38022.38022.38022.97404.06362.89312.89312.89312.89312.89312.8931
H72.97402.38022.38022.38021.08964.06362.89312.89312.89312.89312.89312.8931
H82.26491.09212.47533.16522.26492.89312.89311.81183.56742.29793.56744.1097
H92.26491.09213.16522.47532.26492.89312.89311.81184.10973.56742.29793.5674
H102.26493.16521.09212.47532.26492.89312.89313.56744.10971.81183.56742.2979
H112.26492.47531.09213.16522.26492.89312.89312.29793.56741.81184.10973.5674
H122.26492.47533.16521.09212.26492.89312.89313.56742.29793.56744.10971.8118
H132.26493.16522.47531.09212.26492.89312.89314.10973.56742.29793.56741.8118

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 74.464 C1 C2 H8 116.400
C1 C2 H9 116.400 C1 C3 C5 74.464
C1 C3 H10 116.400 C1 C3 H11 116.400
C1 C4 C5 74.464 C1 C4 H12 116.400
C1 C4 H13 116.400 C2 C1 C3 87.184
C2 C1 C4 87.184 C2 C1 H6 127.232
C2 C5 C3 87.184 C2 C5 C4 87.184
C2 C5 H7 127.232 C3 C1 C4 87.184
C3 C1 H6 127.232 C3 C5 C4 87.184
C3 C5 H7 127.232 C4 C1 H6 127.232
C4 C5 H7 127.232 C5 C2 H8 116.400
C5 C2 H9 116.400 C5 C3 H10 116.400
C5 C3 H11 116.400 C5 C4 H12 116.400
C5 C4 H13 116.400 H8 C2 H9 112.102
H10 C3 H11 112.102 H12 C4 H13 112.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability