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

using model chemistry: QCISD/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-194.847616
Energy at 298.15K 
HF Energy-193.965593
Nuclear repulsion energy179.673633
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/6-311+G(3df,2p)
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' 3133 2988 0.00      
2 A1' 3069 2927 0.00      
3 A1' 1572 1499 0.00      
4 A1' 1144 1091 0.00      
5 A1' 925 882 0.00      
6 A1" 1015 968 0.00      
7 A2' 3127 2983 0.00      
8 A2' 969 924 0.00      
9 A2" 3127 2982 113.37      
10 A2" 1276 1217 33.79      
11 A2" 867 827 4.34      
12 E' 3133 2988 62.81      
12 E' 3133 2988 62.81      
13 E' 3063 2922 74.47      
13 E' 3063 2922 74.47      
14 E' 1520 1450 0.40      
14 E' 1520 1450 0.40      
15 E' 1286 1227 1.65      
15 E' 1286 1227 1.65      
16 E' 1130 1078 0.46      
16 E' 1130 1078 0.46      
17 E' 923 881 0.43      
17 E' 923 881 0.43      
18 E' 547 522 0.15      
18 E' 547 522 0.15      
19 E" 1233 1176 0.00      
19 E" 1233 1176 0.00      
20 E" 1169 1115 0.00      
20 E" 1169 1115 0.00      
21 E" 1045 997 0.00      
21 E" 1045 997 0.00      
22 E" 810 773 0.00      
22 E" 810 773 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25972.5 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 24769.9 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/6-311+G(3df,2p)
ABC
0.24167 0.24167 0.20912

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311+G(3df,2p)

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 2.028
H7 0.000 0.000 -2.028
H8 0.903 1.849 0.000
H9 -0.903 1.849 0.000
H10 1.149 -1.707 0.000
H11 2.053 -0.142 0.000
H12 -2.053 -0.142 0.000
H13 -1.149 -1.707 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55241.55241.55241.87791.08892.96682.26162.26162.26162.26162.26162.2616
C21.55242.14112.14111.55242.37502.37501.09141.09143.15932.47242.47243.1593
C31.55242.14112.14111.55242.37502.37502.47243.15931.09141.09143.15932.4724
C41.55242.14112.14111.55242.37502.37503.15932.47242.47243.15931.09141.0914
C51.87791.55241.55241.55242.96681.08892.26162.26162.26162.26162.26162.2616
H61.08892.37502.37502.37502.96684.05582.88892.88892.88892.88892.88892.8889
H72.96682.37502.37502.37501.08894.05582.88892.88892.88892.88892.88892.8889
H82.26161.09142.47243.15932.26162.88892.88891.80673.56372.29863.56374.1052
H92.26161.09143.15932.47242.26162.88892.88891.80674.10523.56372.29863.5637
H102.26163.15931.09142.47242.26162.88892.88893.56374.10521.80673.56372.2986
H112.26162.47241.09143.15932.26162.88892.88892.29863.56371.80674.10523.5637
H122.26162.47243.15931.09142.26162.88892.88893.56372.29863.56374.10521.8067
H132.26163.15932.47241.09142.26162.88892.88894.10523.56372.29863.56371.8067

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 74.438 C1 C2 H8 116.542
C1 C2 H9 116.542 C1 C3 C5 74.438
C1 C3 H10 116.542 C1 C3 H11 116.542
C1 C4 C5 74.438 C1 C4 H12 116.542
C1 C4 H13 116.542 C2 C1 C3 87.204
C2 C1 C4 87.204 C2 C1 H6 127.219
C2 C5 C3 87.204 C2 C5 C4 87.204
C2 C5 H7 127.219 C3 C1 C4 87.204
C3 C1 H6 127.219 C3 C5 C4 87.204
C3 C5 H7 127.219 C4 C1 H6 127.219
C4 C5 H7 127.219 C5 C2 H8 116.542
C5 C2 H9 116.542 C5 C3 H10 116.542
C5 C3 H11 116.542 C5 C4 H12 116.542
C5 C4 H13 116.542 H8 C2 H9 111.729
H10 C3 H11 111.729 H12 C4 H13 111.729
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability