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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-193.339306
Energy at 298.15K 
HF Energy-192.822378
Nuclear repulsion energy175.448098
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 MP4/3-21G
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' 3146 3051        
2 A1' 3055 2963        
3 A1' 1580 1532        
4 A1' 1111 1078        
5 A1' 931 903        
6 A1" 1018 987        
7 A2' 3122 3028        
8 A2' 955 926        
9 A2" 3132 3037        
10 A2" 1252 1214        
11 A2" 782 758        
12 E' 3129 3035        
12 E' 3129 3035        
13 E' 3050 2958        
13 E' 3050 2958        
14 E' 1540 1493        
14 E' 1539 1493        
15 E' 1249 1212        
15 E' 1249 1212        
16 E' 1111 1077        
16 E' 1104 1070        
17 E' 857 831        
17 E' 857 831        
18 E' 544 527        
18 E' 543 526        
19 E" 1251 1213        
19 E" 1251 1213        
20 E" 1156 1121        
20 E" 1156 1121        
21 E" 1066 1034        
21 E" 1066 1034        
22 E" 734 711        
22 E" 734 711        

Unscaled Zero Point Vibrational Energy (zpe) 25722.0 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 24945.1 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 MP4/3-21G
ABC
0.22919 0.22919 0.19972

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.974
C2 0.000 1.270 0.000
C3 1.100 -0.635 0.000
C4 -1.100 -0.635 0.000
C5 0.000 0.000 -0.974
H6 0.000 0.000 2.065
H7 0.000 0.000 -2.065
H8 0.915 1.876 0.000
H9 -0.915 1.876 0.000
H10 1.167 -1.730 0.000
H11 2.082 -0.146 0.000
H12 -2.082 -0.146 0.000
H13 -1.167 -1.730 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.60041.60041.60041.94751.09103.03852.30302.30302.30302.30302.30302.3030
C21.60042.19972.19971.60042.42412.42411.09721.09723.21922.51772.51773.2192
C31.60042.19972.19971.60042.42412.42412.51773.21921.09721.09723.21922.5177
C41.60042.19972.19971.60042.42412.42413.21922.51772.51773.21921.09721.0972
C51.94751.60041.60041.60043.03851.09102.30302.30302.30302.30302.30302.3030
H61.09102.42412.42412.42413.03854.12962.93582.93582.93582.93582.93582.9358
H73.03852.42412.42412.42411.09104.12962.93582.93582.93582.93582.93582.9358
H82.30301.09722.51773.21922.30302.93582.93581.82943.61492.33453.61494.1639
H92.30301.09723.21922.51772.30302.93582.93581.82944.16393.61492.33453.6149
H102.30303.21921.09722.51772.30302.93582.93583.61494.16391.82943.61492.3345
H112.30302.51771.09723.21922.30302.93582.93582.33453.61491.82944.16393.6149
H122.30302.51773.21921.09722.30302.93582.93583.61492.33453.61494.16391.8294
H132.30303.21922.51771.09722.30302.93582.93584.16393.61492.33453.61491.8294

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 74.957 C1 C2 H8 115.992
C1 C2 H9 115.992 C1 C3 C5 74.957
C1 C3 H10 115.992 C1 C3 H11 115.992
C1 C4 C5 74.957 C1 C4 H12 115.992
C1 C4 H13 115.992 C2 C1 C3 86.828
C2 C1 C4 86.828 C2 C1 H6 127.478
C2 C5 C3 86.828 C2 C5 C4 86.828
C2 C5 H7 127.478 C3 C1 C4 86.828
C3 C1 H6 127.478 C3 C5 C4 86.828
C3 C5 H7 127.478 C4 C1 H6 127.478
C4 C5 H7 127.478 C5 C2 H8 115.992
C5 C2 H9 115.992 C5 C3 H10 115.992
C5 C3 H11 115.992 C5 C4 H12 115.992
C5 C4 H13 115.992 H8 C2 H9 112.959
H10 C3 H11 112.959 H12 C4 H13 112.959
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability