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

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-194.627902
Energy at 298.15K 
HF Energy-193.904104
Nuclear repulsion energy178.985061
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 MP4/6-31G*
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' 3119 2978        
2 A1' 3065 2927        
3 A1' 1586 1514        
4 A1' 1144 1092        
5 A1' 924 882        
6 A1" 1007 962        
7 A2' 3125 2984        
8 A2' 983 939        
9 A2" 3114 2973        
10 A2" 1277 1219        
11 A2" 861 822        
12 E' 3131 2989        
12 E' 3131 2989        
13 E' 3061 2923        
13 E' 3061 2923        
14 E' 1537 1468        
14 E' 1537 1467        
15 E' 1278 1220        
15 E' 1278 1220        
16 E' 1133 1082        
16 E' 1133 1082        
17 E' 918 876        
17 E' 918 876        
18 E' 555 530        
18 E' 554 529        
19 E" 1229 1173        
19 E" 1228 1173        
20 E" 1165 1112        
20 E" 1165 1112        
21 E" 1040 993        
21 E" 1039 992        
22 E" 807 770        
22 E" 807 770        

Unscaled Zero Point Vibrational Energy (zpe) 25953.1 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 24780.0 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 MP4/6-31G*
ABC
0.23994 0.23994 0.20763

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

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 1.073 -0.620 0.000
C4 -1.073 -0.620 0.000
C5 0.000 0.000 -0.942
H6 0.000 0.000 2.039
H7 0.000 0.000 -2.039
H8 0.908 1.859 0.000
H9 -0.908 1.859 0.000
H10 1.156 -1.716 0.000
H11 2.064 -0.143 0.000
H12 -2.064 -0.143 0.000
H13 -1.156 -1.716 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55661.55661.55661.88331.09742.98072.27292.27292.27292.27292.27292.2729
C21.55662.14692.14691.55662.38632.38631.09901.09903.17322.48412.48413.1732
C31.55662.14692.14691.55662.38632.38632.48413.17321.09901.09903.17322.4841
C41.55662.14692.14691.55662.38632.38633.17322.48412.48413.17321.09901.0990
C51.88331.55661.55661.55662.98071.09742.27292.27292.27292.27292.27292.2729
H61.09742.38632.38632.38632.98074.07822.90472.90472.90472.90472.90472.9047
H72.98072.38632.38632.38631.09744.07822.90472.90472.90472.90472.90472.9047
H82.27291.09902.48413.17322.27292.90472.90471.81573.58312.31173.58314.1275
H92.27291.09903.17322.48412.27292.90472.90471.81574.12753.58312.31173.5831
H102.27293.17321.09902.48412.27292.90472.90473.58314.12751.81573.58312.3117
H112.27292.48411.09903.17322.27292.90472.90472.31173.58311.81574.12753.5831
H122.27292.48413.17321.09902.27292.90472.90473.58312.31173.58314.12751.8157
H132.27293.17322.48411.09902.27292.90472.90474.12753.58312.31173.58311.8157

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 74.446 C1 C2 H8 116.662
C1 C2 H9 116.662 C1 C3 C5 74.446
C1 C3 H10 116.662 C1 C3 H11 116.662
C1 C4 C5 74.446 C1 C4 H12 116.662
C1 C4 H13 116.662 C2 C1 C3 87.197
C2 C1 C4 87.197 C2 C1 H6 127.223
C2 C5 C3 87.197 C2 C5 C4 87.197
C2 C5 H7 127.223 C3 C1 C4 87.197
C3 C1 H6 127.223 C3 C5 C4 87.197
C3 C5 H7 127.223 C4 C1 H6 127.223
C4 C5 H7 127.223 C5 C2 H8 116.662
C5 C2 H9 116.662 C5 C3 H10 116.662
C5 C3 H11 116.662 C5 C4 H12 116.662
C5 C4 H13 116.662 H8 C2 H9 111.399
H10 C3 H11 111.399 H12 C4 H13 111.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability