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

using model chemistry: QCISD(T)/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at QCISD(T)/cc-pVDZ
 hartrees
Energy at 0K-194.698994
Energy at 298.15K 
HF Energy-193.916955
Nuclear repulsion energy177.776063
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 QCISD(T)/cc-pVDZ
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' 3123 2976        
2 A1' 3058 2915        
3 A1' 1535 1463        
4 A1' 1128 1075        
5 A1' 915 872        
6 A1" 989 942        
7 A2' 3122 2976        
8 A2' 944 900        
9 A2" 3116 2970        
10 A2" 1253 1194        
11 A2" 843 804        
12 E' 3129 2982        
12 E' 3129 2982        
13 E' 3053 2910        
13 E' 3053 2910        
14 E' 1487 1417        
14 E' 1486 1416        
15 E' 1260 1201        
15 E' 1260 1201        
16 E' 1108 1056        
16 E' 1107 1055        
17 E' 901 859        
17 E' 901 859        
18 E' 533 508        
18 E' 532 507        
19 E" 1200 1144        
19 E" 1200 1143        
20 E" 1145 1091        
20 E" 1145 1091        
21 E" 1018 970        
21 E" 1018 970        
22 E" 792 755        
22 E" 792 755        

Unscaled Zero Point Vibrational Energy (zpe) 25635.1 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 24432.9 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 QCISD(T)/cc-pVDZ
ABC
0.23661 0.23661 0.20520

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.950
C2 0.000 1.247 0.000
C3 1.080 -0.624 0.000
C4 -1.080 -0.624 0.000
C5 0.000 0.000 -0.950
H6 0.000 0.000 2.054
H7 0.000 0.000 -2.054
H8 0.916 1.868 0.000
H9 -0.916 1.868 0.000
H10 1.159 -1.727 0.000
H11 2.075 -0.141 0.000
H12 -2.075 -0.141 0.000
H13 -1.159 -1.727 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56781.56781.56781.90021.10393.00422.28682.28682.28682.28682.28682.2868
C21.56782.16012.16011.56782.40302.40301.10631.10633.19212.49652.49653.1921
C31.56782.16012.16011.56782.40302.40302.49653.19211.10631.10633.19212.4965
C41.56782.16012.16011.56782.40302.40303.19212.49652.49653.19211.10631.1063
C51.90021.56781.56781.56783.00421.10392.28682.28682.28682.28682.28682.2868
H61.10392.40302.40302.40303.00424.10812.92332.92332.92332.92332.92332.9233
H73.00422.40302.40302.40301.10394.10812.92332.92332.92332.92332.92332.9233
H82.28681.10632.49653.19212.28682.92332.92331.83193.60272.31873.60274.1506
H92.28681.10633.19212.49652.28682.92332.92331.83194.15063.60272.31873.6027
H102.28683.19211.10632.49652.28682.92332.92333.60274.15061.83193.60272.3187
H112.28682.49651.10633.19212.28682.92332.92332.31873.60271.83194.15063.6027
H122.28682.49653.19211.10632.28682.92332.92333.60272.31873.60274.15061.8319
H132.28683.19212.49651.10632.28682.92332.92334.15063.60272.31873.60271.8319

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 74.604 C1 C2 H8 116.494
C1 C2 H9 116.494 C1 C3 C5 74.604
C1 C3 H10 116.494 C1 C3 H11 116.494
C1 C4 C5 74.604 C1 C4 H12 116.494
C1 C4 H13 116.494 C2 C1 C3 87.084
C2 C1 C4 87.084 C2 C1 H6 127.302
C2 C5 C3 87.084 C2 C5 C4 87.084
C2 C5 H7 127.302 C3 C1 C4 87.084
C3 C1 H6 127.302 C3 C5 C4 87.084
C3 C5 H7 127.302 C4 C1 H6 127.302
C4 C5 H7 127.302 C5 C2 H8 116.494
C5 C2 H9 116.494 C5 C3 H10 116.494
C5 C3 H11 116.494 C5 C4 H12 116.494
C5 C4 H13 116.494 H8 C2 H9 111.777
H10 C3 H11 111.776 H12 C4 H13 111.776
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability