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: B2PLYP=FULL/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 B2PLYP=FULL/6-31G**
 hartrees
Energy at 0K-195.048166
Energy at 298.15K 
HF Energy-194.808947
Nuclear repulsion energy179.637913
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 B2PLYP=FULL/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' 3151 3151 0.00      
2 A1' 3094 3094 0.00      
3 A1' 1589 1589 0.00      
4 A1' 1145 1145 0.00      
5 A1' 922 922 0.00      
6 A1" 1017 1017 0.00      
7 A2' 3155 3155 0.00      
8 A2' 985 985 0.00      
9 A2" 3146 3146 125.95      
10 A2" 1283 1283 27.14      
11 A2" 866 866 3.29      
12 E' 3161 3161 66.69      
12 E' 3161 3161 66.69      
13 E' 3089 3089 73.35      
13 E' 3089 3089 73.34      
14 E' 1538 1538 0.00      
14 E' 1538 1538 0.00      
15 E' 1289 1289 0.94      
15 E' 1289 1289 0.94      
16 E' 1137 1137 0.57      
16 E' 1137 1137 0.57      
17 E' 923 923 0.24      
17 E' 923 923 0.24      
18 E' 553 553 0.21      
18 E' 553 553 0.21      
19 E" 1236 1236 0.00      
19 E" 1236 1236 0.00      
20 E" 1171 1171 0.00      
20 E" 1171 1171 0.00      
21 E" 1048 1048 0.00      
21 E" 1048 1048 0.00      
22 E" 804 804 0.00      
22 E" 804 804 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26123.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 26123.1 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 B2PLYP=FULL/6-31G**
ABC
0.24162 0.24162 0.20893

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G**

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.938
C2 0.000 1.236 0.000
C3 1.071 -0.618 0.000
C4 -1.071 -0.618 0.000
C5 0.000 0.000 -0.938
H6 0.000 0.000 2.028
H7 0.000 0.000 -2.028
H8 0.902 1.851 0.000
H9 -0.902 1.851 0.000
H10 1.152 -1.707 0.000
H11 2.054 -0.144 0.000
H12 -2.054 -0.144 0.000
H13 -1.152 -1.707 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55221.55221.55221.87681.09002.96672.26322.26322.26322.26322.26322.2632
C21.55222.14162.14161.55222.37552.37551.09201.09203.16102.47522.47523.1610
C31.55222.14162.14161.55222.37552.37552.47523.16101.09201.09203.16102.4752
C41.55222.14162.14161.55222.37552.37553.16102.47522.47523.16101.09201.0920
C51.87681.55221.55221.55222.96671.09002.26322.26322.26322.26322.26322.2632
H61.09002.37552.37552.37552.96674.05672.89062.89062.89062.89062.89062.8906
H72.96672.37552.37552.37551.09004.05672.89062.89062.89062.89062.89062.8906
H82.26321.09202.47523.16102.26322.89062.89061.80483.56722.30413.56724.1089
H92.26321.09203.16102.47522.26322.89062.89061.80484.10893.56722.30413.5672
H102.26323.16101.09202.47522.26322.89062.89063.56724.10891.80483.56722.3041
H112.26322.47521.09203.16102.26322.89062.89062.30413.56721.80484.10893.5672
H122.26322.47523.16101.09202.26322.89062.89063.56722.30413.56724.10891.8048
H132.26323.16102.47521.09202.26322.89062.89064.10893.56722.30413.56721.8048

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 74.394 C1 C2 H8 116.648
C1 C2 H9 116.648 C1 C3 C5 74.394
C1 C3 H10 116.648 C1 C3 H11 116.648
C1 C4 C5 74.394 C1 C4 H12 116.648
C1 C4 H13 116.648 C2 C1 C3 87.236
C2 C1 C4 87.236 C2 C1 H6 127.197
C2 C5 C3 87.236 C2 C5 C4 87.236
C2 C5 H7 127.197 C3 C1 C4 87.236
C3 C1 H6 127.197 C3 C5 C4 87.236
C3 C5 H7 127.197 C4 C1 H6 127.197
C4 C5 H7 127.197 C5 C2 H8 116.648
C5 C2 H9 116.648 C5 C3 H10 116.648
C5 C3 H11 116.648 C5 C4 H12 116.648
C5 C4 H13 116.648 H8 C2 H9 111.465
H10 C3 H11 111.465 H12 C4 H13 111.465
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability