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

using model chemistry: MP2/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-194.732214
Energy at 298.15K 
HF Energy-193.928970
Nuclear repulsion energy179.852286
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(2df,p)
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' 3175 2999 0.00      
2 A1' 3113 2941 0.00      
3 A1' 1570 1482 0.00      
4 A1' 1148 1084 0.00      
5 A1' 915 864 0.00      
6 A1" 1015 958 0.00      
7 A2' 3188 3011 0.00      
8 A2' 968 915 0.00      
9 A2" 3170 2994 86.47      
10 A2" 1268 1198 30.90      
11 A2" 878 829 4.11      
12 E' 3192 3015 41.21      
12 E' 3192 3015 41.21      
13 E' 3111 2938 54.08      
13 E' 3111 2938 54.08      
14 E' 1515 1431 0.19      
14 E' 1515 1431 0.19      
15 E' 1282 1211 1.77      
15 E' 1282 1211 1.77      
16 E' 1128 1065 0.29      
16 E' 1128 1065 0.29      
17 E' 937 885 0.25      
17 E' 937 885 0.25      
18 E' 545 515 0.26      
18 E' 545 515 0.26      
19 E" 1224 1156 0.00      
19 E" 1224 1156 0.00      
20 E" 1162 1097 0.00      
20 E" 1162 1097 0.00      
21 E" 1040 983 0.00      
21 E" 1040 983 0.00      
22 E" 824 778 0.00      
22 E" 824 778 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26161.5 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 24709.5 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(2df,p)
ABC
0.24220 0.24220 0.20964

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.938
C2 0.000 1.234 0.000
C3 1.069 -0.617 0.000
C4 -1.069 -0.617 0.000
C5 0.000 0.000 -0.938
H6 0.000 0.000 2.027
H7 0.000 0.000 -2.027
H8 0.905 1.846 0.000
H9 -0.905 1.846 0.000
H10 1.146 -1.706 0.000
H11 2.051 -0.140 0.000
H12 -2.051 -0.140 0.000
H13 -1.146 -1.706 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55041.55041.55041.87601.08892.96492.25952.25952.25952.25952.25952.2595
C21.55042.13822.13821.55042.37322.37321.09181.09183.15632.46862.46863.1563
C31.55042.13822.13821.55042.37322.37322.46863.15631.09181.09183.15632.4686
C41.55042.13822.13821.55042.37322.37323.15632.46862.46863.15631.09181.0918
C51.87601.55041.55041.55042.96491.08892.25952.25952.25952.25952.25952.2595
H61.08892.37322.37322.37322.96494.05372.88682.88682.88682.88682.88682.8868
H72.96492.37322.37322.37321.08894.05372.88682.88682.88682.88682.88682.8868
H82.25951.09182.46863.15632.25952.88682.88681.80913.56042.29263.56044.1017
H92.25951.09183.15632.46862.25952.88682.88681.80914.10173.56042.29263.5604
H102.25953.15631.09182.46862.25952.88682.88683.56044.10171.80913.56042.2926
H112.25952.46861.09183.15632.25952.88682.88682.29263.56041.80914.10173.5604
H122.25952.46863.15631.09182.25952.88682.88683.56042.29263.56044.10171.8091
H132.25953.15632.46861.09182.25952.88682.88684.10173.56042.29263.56041.8091

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 74.458 C1 C2 H8 116.481
C1 C2 H9 116.481 C1 C3 C5 74.458
C1 C3 H10 116.481 C1 C3 H11 116.481
C1 C4 C5 74.458 C1 C4 H12 116.481
C1 C4 H13 116.481 C2 C1 C3 87.189
C2 C1 C4 87.189 C2 C1 H6 127.229
C2 C5 C3 87.189 C2 C5 C4 87.189
C2 C5 H7 127.229 C3 C1 C4 87.189
C3 C1 H6 127.229 C3 C5 C4 87.189
C3 C5 H7 127.229 C4 C1 H6 127.229
C4 C5 H7 127.229 C5 C2 H8 116.481
C5 C2 H9 116.481 C5 C3 H10 116.481
C5 C3 H11 116.481 C5 C4 H12 116.481
C5 C4 H13 116.481 H8 C2 H9 111.886
H10 C3 H11 111.886 H12 C4 H13 111.886
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability