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

using model chemistry: CCSD(T)/TZVP

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(T)/TZVP
 hartrees
Energy at 0K-194.773703
Energy at 298.15K 
HF Energy-193.962655
Nuclear repulsion energy179.071612
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(T)/TZVP
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' 3129 3012        
2 A1' 3063 2948        
3 A1' 1569 1510        
4 A1' 1133 1090        
5 A1' 922 888        
6 A1" 992 954        
7 A2' 3123 3006        
8 A2' 971 935        
9 A2" 3123 3006        
10 A2" 1255 1208        
11 A2" 838 807        
12 E' 3129 3012        
12 E' 3129 3012        
13 E' 3058 2943        
13 E' 3058 2943        
14 E' 1519 1462        
14 E' 1518 1462        
15 E' 1244 1197        
15 E' 1244 1197        
16 E' 1120 1078        
16 E' 1120 1078        
17 E' 893 859        
17 E' 893 859        
18 E' 549 529        
18 E' 549 528        
19 E" 1212 1166        
19 E" 1211 1166        
20 E" 1134 1092        
20 E" 1134 1092        
21 E" 1009 971        
21 E" 1009 971        
22 E" 786 757        
22 E" 786 757        

Unscaled Zero Point Vibrational Energy (zpe) 25710.4 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 24746.2 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(T)/TZVP
ABC
0.23995 0.23995 0.20779

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/TZVP

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.943
C2 0.000 1.241 0.000
C3 1.074 -0.620 0.000
C4 -1.074 -0.620 0.000
C5 0.000 0.000 -0.943
H6 0.000 0.000 2.034
H7 0.000 0.000 -2.034
H8 0.907 1.852 0.000
H9 -0.907 1.852 0.000
H10 1.151 -1.711 0.000
H11 2.057 -0.141 0.000
H12 -2.057 -0.141 0.000
H13 -1.151 -1.711 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55851.55851.55851.88651.09082.97732.26772.26772.26772.26772.26772.2677
C21.55852.14892.14891.55852.38262.38261.09371.09373.16832.47822.47823.1683
C31.55852.14892.14891.55852.38262.38262.47823.16831.09371.09373.16832.4782
C41.55852.14892.14891.55852.38262.38263.16832.47822.47823.16831.09371.0937
C51.88651.55851.55851.55852.97731.09082.26772.26772.26772.26772.26772.2677
H61.09082.38262.38262.38262.97734.06822.89662.89662.89662.89662.89662.8966
H72.97732.38262.38262.38261.09084.06822.89662.89662.89662.89662.89662.8966
H82.26771.09372.47823.16832.26772.89662.89661.81343.57192.30143.57194.1149
H92.26771.09373.16832.47822.26772.89662.89661.81344.11493.57192.30143.5719
H102.26773.16831.09372.47822.26772.89662.89663.57194.11491.81343.57192.3014
H112.26772.47821.09373.16832.26772.89662.89662.30143.57191.81344.11493.5719
H122.26772.47823.16831.09372.26772.89662.89663.57192.30143.57194.11491.8134
H132.26773.16832.47821.09372.26772.89662.89664.11493.57192.30143.57191.8134

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 74.490 C1 C2 H8 116.433
C1 C2 H9 116.433 C1 C3 C5 74.490
C1 C3 H10 116.433 C1 C3 H11 116.433
C1 C4 C5 74.490 C1 C4 H12 116.433
C1 C4 H13 116.433 C2 C1 C3 87.166
C2 C1 C4 87.166 C2 C1 H6 127.245
C2 C5 C3 87.166 C2 C5 C4 87.166
C2 C5 H7 127.245 C3 C1 C4 87.166
C3 C1 H6 127.245 C3 C5 C4 87.166
C3 C5 H7 127.245 C4 C1 H6 127.245
C4 C5 H7 127.245 C5 C2 H8 116.433
C5 C2 H9 116.433 C5 C3 H10 116.433
C5 C3 H11 116.433 C5 C4 H12 116.433
C5 C4 H13 116.433 H8 C2 H9 112.000
H10 C3 H11 112.000 H12 C4 H13 112.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability