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

using model chemistry: CCSD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-194.676781
Energy at 298.15K 
HF Energy-193.920494
Nuclear repulsion energy179.501725
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/6-31+G**
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' 3182 2971 0.00      
2 A1' 3119 2913 0.00      
3 A1' 1601 1495 0.00      
4 A1' 1153 1077 0.00      
5 A1' 934 872 0.00      
6 A1" 1016 949 0.00      
7 A2' 3177 2967 0.00      
8 A2' 990 924 0.00      
9 A2" 3175 2965 127.21      
10 A2" 1293 1208 35.72      
11 A2" 868 811 5.94      
12 E' 3184 2973 71.44      
12 E' 3184 2973 71.44      
13 E' 3113 2907 80.87      
13 E' 3113 2907 80.87      
14 E' 1553 1450 0.00      
14 E' 1553 1450 0.00      
15 E' 1294 1208 1.42      
15 E' 1294 1208 1.42      
16 E' 1144 1068 0.67      
16 E' 1144 1068 0.67      
17 E' 926 864 0.68      
17 E' 926 864 0.68      
18 E' 558 521 0.14      
18 E' 558 521 0.14      
19 E" 1247 1164 0.00      
19 E" 1247 1164 0.00      
20 E" 1178 1100 0.00      
20 E" 1178 1100 0.00      
21 E" 1047 978 0.00      
21 E" 1047 978 0.00      
22 E" 815 761 0.00      
22 E" 815 761 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26311.5 cm-1
Scaled (by 0.9338) Zero Point Vibrational Energy (zpe) 24569.7 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 CCSD/6-31+G**
ABC
0.24116 0.24116 0.20867

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.940
C2 0.000 1.237 0.000
C3 1.072 -0.619 0.000
C4 -1.072 -0.619 0.000
C5 0.000 0.000 -0.940
H6 0.000 0.000 2.029
H7 0.000 0.000 -2.029
H8 0.902 1.852 0.000
H9 -0.902 1.852 0.000
H10 1.152 -1.707 0.000
H11 2.055 -0.144 0.000
H12 -2.055 -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
C11.55411.55411.55411.88031.08882.96912.26422.26422.26422.26422.26422.2642
C21.55412.14342.14341.55412.37662.37661.09141.09143.16222.47612.47613.1622
C31.55412.14342.14341.55412.37662.37662.47613.16221.09141.09143.16222.4761
C41.55412.14342.14341.55412.37662.37663.16222.47612.47613.16221.09141.0914
C51.88031.55411.55411.55412.96911.08882.26422.26422.26422.26422.26422.2642
H61.08882.37662.37662.37662.96914.05792.89122.89122.89122.89122.89122.8912
H72.96912.37662.37662.37661.08884.05792.89122.89122.89122.89122.89122.8912
H82.26421.09142.47613.16222.26422.89122.89121.80463.56762.30483.56764.1093
H92.26421.09143.16222.47612.26422.89122.89121.80464.10933.56762.30483.5676
H102.26423.16221.09142.47612.26422.89122.89123.56764.10931.80463.56762.3048
H112.26422.47611.09143.16222.26422.89122.89122.30483.56761.80464.10933.5676
H122.26422.47613.16221.09142.26422.89122.89123.56762.30483.56764.10931.8046
H132.26423.16222.47611.09142.26422.89122.89124.10933.56762.30483.56761.8046

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 74.450 C1 C2 H8 116.617
C1 C2 H9 116.617 C1 C3 C5 74.450
C1 C3 H10 116.617 C1 C3 H11 116.617
C1 C4 C5 74.450 C1 C4 H12 116.617
C1 C4 H13 116.617 C2 C1 C3 87.195
C2 C1 C4 87.195 C2 C1 H6 127.225
C2 C5 C3 87.195 C2 C5 C4 87.195
C2 C5 H7 127.225 C3 C1 C4 87.195
C3 C1 H6 127.225 C3 C5 C4 87.195
C3 C5 H7 127.225 C4 C1 H6 127.225
C4 C5 H7 127.225 C5 C2 H8 116.617
C5 C2 H9 116.617 C5 C3 H10 116.617
C5 C3 H11 116.617 C5 C4 H12 116.617
C5 C4 H13 116.617 H8 C2 H9 111.522
H10 C3 H11 111.522 H12 C4 H13 111.522
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability