return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: QCISD/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-194.701591
Energy at 298.15K 
HF Energy-193.923821
Nuclear repulsion energy177.960275
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/aug-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' 3135 3037 0.00      
2 A1' 3064 2968 0.00      
3 A1' 1551 1503 0.00      
4 A1' 1133 1097 0.00      
5 A1' 920 892 0.00      
6 A1" 998 967 0.00      
7 A2' 3124 3026 0.00      
8 A2' 949 919 0.00      
9 A2" 3129 3031 119.70      
10 A2" 1259 1219 28.86      
11 A2" 852 825 4.06      
12 E' 3130 3032 68.50      
12 E' 3130 3032 68.50      
13 E' 3058 2962 80.23      
13 E' 3058 2962 80.23      
14 E' 1501 1454 0.11      
14 E' 1501 1454 0.11      
15 E' 1266 1226 1.35      
15 E' 1266 1226 1.35      
16 E' 1112 1078 0.62      
16 E' 1112 1078 0.62      
17 E' 908 880 0.40      
17 E' 908 880 0.40      
18 E' 541 524 0.09      
18 E' 541 524 0.09      
19 E" 1210 1172 0.00      
19 E" 1210 1172 0.00      
20 E" 1154 1118 0.00      
20 E" 1154 1118 0.00      
21 E" 1028 995 0.00      
21 E" 1028 995 0.00      
22 E" 797 772 0.00      
22 E" 797 772 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25760.7 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 24954.4 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/aug-cc-pVDZ
ABC
0.23701 0.23701 0.20551

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-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 -0.623 0.000
C4 -1.080 -0.623 0.000
C5 0.000 0.000 -0.950
H6 0.000 0.000 2.050
H7 0.000 0.000 -2.050
H8 0.913 1.866 0.000
H9 -0.913 1.866 0.000
H10 1.159 -1.723 0.000
H11 2.072 -0.142 0.000
H12 -2.072 -0.142 0.000
H13 -1.159 -1.723 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56711.56711.56711.89921.10032.99952.28382.28382.28382.28382.28382.2838
C21.56712.15912.15911.56712.39922.39921.10301.10303.18822.49452.49453.1882
C31.56712.15912.15911.56712.39922.39922.49453.18821.10301.10303.18822.4945
C41.56712.15912.15911.56712.39922.39923.18822.49452.49453.18821.10301.1030
C51.89921.56711.56711.56712.99951.10032.28382.28382.28382.28382.28382.2838
H61.10032.39922.39922.39922.99954.09992.91832.91832.91832.91832.91832.9183
H72.99952.39922.39922.39921.10034.09992.91832.91832.91832.91832.91832.9183
H82.28381.10302.49453.18822.28382.91832.91831.82583.59752.31853.59754.1443
H92.28381.10303.18822.49452.28382.91832.91831.82584.14433.59752.31853.5975
H102.28383.18821.10302.49452.28382.91832.91833.59754.14431.82583.59752.3185
H112.28382.49451.10303.18822.28382.91832.91832.31853.59751.82584.14433.5975
H122.28382.49453.18821.10302.28382.91832.91833.59752.31853.59754.14431.8258
H132.28383.18822.49451.10302.28382.91832.91834.14433.59752.31853.59751.8258

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 74.598 C1 C2 H8 116.517
C1 C2 H9 116.517 C1 C3 C5 74.598
C1 C3 H10 116.517 C1 C3 H11 116.517
C1 C4 C5 74.598 C1 C4 H12 116.517
C1 C4 H13 116.517 C2 C1 C3 87.087
C2 C1 C4 87.087 C2 C1 H6 127.299
C2 C5 C3 87.087 C2 C5 C4 87.087
C2 C5 H7 127.299 C3 C1 C4 87.087
C3 C1 H6 127.299 C3 C5 C4 87.087
C3 C5 H7 127.299 C4 C1 H6 127.299
C4 C5 H7 127.299 C5 C2 H8 116.517
C5 C2 H9 116.517 C5 C3 H10 116.517
C5 C3 H11 116.517 C5 C4 H12 116.517
C5 C4 H13 116.517 H8 C2 H9 111.715
H10 C3 H11 111.715 H12 C4 H13 111.715
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability