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

using model chemistry: QCISD/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/cc-pVDZ
 hartrees
Energy at 0K-194.672196
Energy at 298.15K 
HF Energy-193.917666
Nuclear repulsion energy178.188861
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/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' 3144 3017 0.00      
2 A1' 3079 2954 0.00      
3 A1' 1551 1488 0.00      
4 A1' 1143 1097 0.00      
5 A1' 926 888 0.00      
6 A1" 1000 960 0.00      
7 A2' 3140 3013 0.00      
8 A2' 956 917 0.00      
9 A2" 3137 3010 108.49      
10 A2" 1272 1220 25.99      
11 A2" 858 823 4.21      
12 E' 3147 3019 62.15      
12 E' 3147 3019 62.15      
13 E' 3073 2948 70.31      
13 E' 3073 2948 70.31      
14 E' 1501 1440 0.03      
14 E' 1501 1440 0.03      
15 E' 1279 1227 1.26      
15 E' 1279 1227 1.26      
16 E' 1120 1074 0.60      
16 E' 1120 1074 0.60      
17 E' 915 878 0.36      
17 E' 915 878 0.36      
18 E' 541 519 0.19      
18 E' 541 519 0.19      
19 E" 1217 1168 0.00      
19 E" 1217 1168 0.00      
20 E" 1162 1115 0.00      
20 E" 1162 1115 0.00      
21 E" 1030 989 0.00      
21 E" 1030 989 0.00      
22 E" 805 773 0.00      
22 E" 805 773 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25893.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 24841.7 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/cc-pVDZ
ABC
0.23775 0.23775 0.20609

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.947
C2 0.000 1.244 0.000
C3 1.077 -0.622 0.000
C4 -1.077 -0.622 0.000
C5 0.000 0.000 -0.947
H6 0.000 0.000 2.049
H7 0.000 0.000 -2.049
H8 0.914 1.865 0.000
H9 -0.914 1.865 0.000
H10 1.158 -1.724 0.000
H11 2.072 -0.141 0.000
H12 -2.072 -0.141 0.000
H13 -1.158 -1.724 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56381.56381.56381.89471.10212.99672.28232.28232.28232.28232.28232.2823
C21.56382.15502.15501.56382.39752.39751.10451.10453.18572.49202.49203.1857
C31.56382.15502.15501.56382.39752.39752.49203.18571.10451.10453.18572.4920
C41.56382.15502.15501.56382.39752.39753.18572.49202.49203.18571.10451.1045
C51.89471.56381.56381.56382.99671.10212.28232.28232.28232.28232.28232.2823
H61.10212.39752.39752.39752.99674.09882.91742.91742.91742.91742.91742.9174
H72.99672.39752.39752.39751.10214.09882.91742.91742.91742.91742.91742.9174
H82.28231.10452.49203.18572.28232.91742.91741.82763.59642.31573.59644.1432
H92.28231.10453.18572.49202.28232.91742.91741.82764.14323.59642.31573.5964
H102.28233.18571.10452.49202.28232.91742.91743.59644.14321.82763.59642.3157
H112.28232.49201.10453.18572.28232.91742.91742.31573.59641.82764.14323.5964
H122.28232.49203.18571.10452.28232.91742.91743.59642.31573.59644.14321.8276
H132.28233.18572.49201.10452.28232.91742.91744.14323.59642.31573.59641.8276

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 74.572 C1 C2 H8 116.543
C1 C2 H9 116.543 C1 C3 C5 74.572
C1 C3 H10 116.543 C1 C3 H11 116.543
C1 C4 C5 74.572 C1 C4 H12 116.543
C1 C4 H13 116.543 C2 C1 C3 87.106
C2 C1 C4 87.106 C2 C1 H6 127.286
C2 C5 C3 87.106 C2 C5 C4 87.106
C2 C5 H7 127.286 C3 C1 C4 87.106
C3 C1 H6 127.286 C3 C5 C4 87.106
C3 C5 H7 127.286 C4 C1 H6 127.286
C4 C5 H7 127.286 C5 C2 H8 116.543
C5 C2 H9 116.543 C5 C3 H10 116.543
C5 C3 H11 116.543 C5 C4 H12 116.543
C5 C4 H13 116.543 H8 C2 H9 111.657
H10 C3 H11 111.658 H12 C4 H13 111.658
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability