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

using model chemistry: CCSD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at CCSD/Def2TZVPP
 hartrees
Energy at 0K-194.859797
Energy at 298.15K 
HF Energy-193.974334
Nuclear repulsion energy179.751711
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 CCSD/Def2TZVPP
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' 3153 3153 0.00      
2 A1' 3084 3084 0.00      
3 A1' 1573 1573 0.00      
4 A1' 1143 1143 0.00      
5 A1' 926 926 0.00      
6 A1" 1019 1019 0.00      
7 A2' 3141 3141 0.00      
8 A2' 973 973 0.00      
9 A2" 3147 3147 107.71      
10 A2" 1278 1278 35.44      
11 A2" 866 866 4.90      
12 E' 3147 3147 59.92      
12 E' 3147 3147 59.92      
13 E' 3078 3078 71.86      
13 E' 3078 3078 71.86      
14 E' 1523 1523 0.41      
14 E' 1523 1523 0.41      
15 E' 1290 1290 1.78      
15 E' 1290 1290 1.78      
16 E' 1133 1133 0.46      
16 E' 1133 1133 0.46      
17 E' 923 923 0.53      
17 E' 923 923 0.53      
18 E' 544 544 0.15      
18 E' 544 544 0.15      
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" 1049 1049 0.00      
21 E" 1049 1049 0.00      
22 E" 808 808 0.00      
22 E" 808 808 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26054.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 26054.4 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 CCSD/Def2TZVPP
ABC
0.24182 0.24182 0.20925

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/Def2TZVPP

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.939
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 -0.939
H6 0.000 0.000 2.025
H7 0.000 0.000 -2.025
H8 0.903 1.846 0.000
H9 -0.903 1.846 0.000
H10 1.147 -1.705 0.000
H11 2.050 -0.141 0.000
H12 -2.050 -0.141 0.000
H13 -1.147 -1.705 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55251.55251.55251.87801.08652.96452.25942.25942.25942.25942.25942.2594
C21.55252.14132.14131.55252.37302.37301.08951.08953.15712.46992.46993.1571
C31.55252.14132.14131.55252.37302.37302.46993.15711.08951.08953.15712.4699
C41.55252.14132.14131.55252.37302.37303.15712.46992.46993.15711.08951.0895
C51.87801.55251.55251.55252.96451.08652.25942.25942.25942.25942.25942.2594
H61.08652.37302.37302.37302.96454.05102.88542.88542.88542.88542.88542.8854
H72.96452.37302.37302.37301.08654.05102.88542.88542.88542.88542.88542.8854
H82.25941.08952.46993.15712.25942.88542.88541.80573.55942.29473.55944.1004
H92.25941.08953.15712.46992.25942.88542.88541.80574.10043.55942.29473.5594
H102.25943.15711.08952.46992.25942.88542.88543.55944.10041.80573.55942.2947
H112.25942.46991.08953.15712.25942.88542.88542.29473.55941.80574.10043.5594
H122.25942.46993.15711.08952.25942.88542.88543.55942.29473.55944.10041.8057
H132.25943.15712.46991.08952.25942.88542.88544.10043.55942.29473.55941.8057

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 74.436 C1 C2 H8 116.470
C1 C2 H9 116.470 C1 C3 C5 74.436
C1 C3 H10 116.469 C1 C3 H11 116.470
C1 C4 C5 74.436 C1 C4 H12 116.470
C1 C4 H13 116.469 C2 C1 C3 87.205
C2 C1 C4 87.205 C2 C1 H6 127.218
C2 C5 C3 87.205 C2 C5 C4 87.205
C2 C5 H7 127.218 C3 C1 C4 87.205
C3 C1 H6 127.218 C3 C5 C4 87.205
C3 C5 H7 127.218 C4 C1 H6 127.218
C4 C5 H7 127.218 C5 C2 H8 116.470
C5 C2 H9 116.470 C5 C3 H10 116.469
C5 C3 H11 116.470 C5 C4 H12 116.470
C5 C4 H13 116.469 H8 C2 H9 111.928
H10 C3 H11 111.928 H12 C4 H13 111.928
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability