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: CCSD(T)=FULL/TZVP

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(T)=FULL/TZVP
 hartrees
Energy at 0K-194.863880
Energy at 298.15K 
HF Energy-193.962815
Nuclear repulsion energy179.205337
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(T)=FULL/TZVP
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' 3129 2991        
2 A1' 3063 2928        
3 A1' 1570 1501        
4 A1' 1134 1084        
5 A1' 923 882        
6 A1" 994 950        
7 A2' 3123 2986        
8 A2' 973 930        
9 A2" 3123 2986        
10 A2" 1257 1202        
11 A2" 840 803        
12 E' 3130 2992        
12 E' 3129 2992        
13 E' 3057 2923        
13 E' 3057 2923        
14 E' 1520 1453        
14 E' 1519 1453        
15 E' 1246 1191        
15 E' 1246 1191        
16 E' 1122 1072        
16 E' 1121 1072        
17 E' 895 856        
17 E' 895 855        
18 E' 551 527        
18 E' 550 526        
19 E" 1215 1161        
19 E" 1215 1161        
20 E" 1136 1086        
20 E" 1136 1086        
21 E" 1011 966        
21 E" 1010 966        
22 E" 788 754        
22 E" 788 754        

Unscaled Zero Point Vibrational Energy (zpe) 25732.7 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 24600.4 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 CCSD(T)=FULL/TZVP
ABC
0.24031 0.24031 0.20809

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.942
C2 0.000 1.240 0.000
C3 1.074 -0.620 0.000
C4 -1.074 -0.620 0.000
C5 0.000 0.000 -0.942
H6 0.000 0.000 2.033
H7 0.000 0.000 -2.033
H8 0.906 1.851 0.000
H9 -0.906 1.851 0.000
H10 1.150 -1.710 0.000
H11 2.056 -0.141 0.000
H12 -2.056 -0.141 0.000
H13 -1.150 -1.710 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55721.55721.55721.88481.09022.97512.26612.26612.26612.26612.26612.2661
C21.55722.14722.14721.55722.38092.38091.09301.09303.16612.47652.47653.1661
C31.55722.14722.14721.55722.38092.38092.47653.16611.09301.09303.16612.4765
C41.55722.14722.14721.55722.38092.38093.16612.47652.47653.16611.09301.0930
C51.88481.55721.55721.55722.97511.09022.26612.26612.26612.26612.26612.2661
H61.09022.38092.38092.38092.97514.06532.89462.89462.89462.89462.89462.8946
H72.97512.38092.38092.38091.09024.06532.89462.89462.89462.89462.89462.8946
H82.26611.09302.47653.16612.26612.89462.89461.81223.56952.29983.56954.1121
H92.26611.09303.16612.47652.26612.89462.89461.81224.11213.56952.29983.5695
H102.26613.16611.09302.47652.26612.89462.89463.56954.11211.81223.56952.2998
H112.26612.47651.09303.16612.26612.89462.89462.29983.56951.81224.11213.5695
H122.26612.47653.16611.09302.26612.89462.89463.56952.29983.56954.11211.8122
H132.26613.16612.47651.09302.26612.89462.89464.11213.56952.29983.56951.8122

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 74.483 C1 C2 H8 116.436
C1 C2 H9 116.436 C1 C3 C5 74.483
C1 C3 H10 116.436 C1 C3 H11 116.436
C1 C4 C5 74.483 C1 C4 H12 116.436
C1 C4 H13 116.436 C2 C1 C3 87.171
C2 C1 C4 87.171 C2 C1 H6 127.242
C2 C5 C3 87.171 C2 C5 C4 87.171
C2 C5 H7 127.242 C3 C1 C4 87.171
C3 C1 H6 127.242 C3 C5 C4 87.171
C3 C5 H7 127.242 C4 C1 H6 127.242
C4 C5 H7 127.242 C5 C2 H8 116.436
C5 C2 H9 116.436 C5 C3 H10 116.436
C5 C3 H11 116.436 C5 C4 H12 116.436
C5 C4 H13 116.436 H8 C2 H9 111.994
H10 C3 H11 111.994 H12 C4 H13 111.994
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability