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: B2PLYP/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 B2PLYP/6-31+G**
 hartrees
Energy at 0K-195.046392
Energy at 298.15K 
HF Energy-194.812681
Nuclear repulsion energy179.396575
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 B2PLYP/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' 3142 2992 0.00      
2 A1' 3086 2939 0.00      
3 A1' 1579 1503 0.00      
4 A1' 1137 1083 0.00      
5 A1' 916 872 0.00      
6 A1" 1007 959 0.00      
7 A2' 3147 2997 0.00      
8 A2' 981 934 0.00      
9 A2" 3137 2987 140.99      
10 A2" 1269 1209 41.26      
11 A2" 858 817 5.39      
12 E' 3152 3002 74.08      
12 E' 3152 3002 74.08      
13 E' 3081 2934 85.94      
13 E' 3081 2934 85.94      
14 E' 1528 1455 0.11      
14 E' 1528 1455 0.11      
15 E' 1275 1214 1.85      
15 E' 1275 1214 1.85      
16 E' 1130 1076 0.44      
16 E' 1130 1076 0.44      
17 E' 914 870 0.63      
17 E' 914 870 0.63      
18 E' 551 525 0.18      
18 E' 551 525 0.18      
19 E" 1229 1170 0.00      
19 E" 1229 1170 0.00      
20 E" 1157 1102 0.00      
20 E" 1157 1102 0.00      
21 E" 1037 988 0.00      
21 E" 1037 988 0.00      
22 E" 797 759 0.00      
22 E" 797 759 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25977.0 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 24740.5 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 B2PLYP/6-31+G**
ABC
0.24097 0.24097 0.20831

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/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 1.239 0.000
C3 1.073 -0.619 0.000
C4 -1.073 -0.619 0.000
C5 0.000 0.000 -0.940
H6 0.000 0.000 2.030
H7 0.000 0.000 -2.030
H8 0.903 1.853 0.000
H9 -0.903 1.853 0.000
H10 1.153 -1.709 0.000
H11 2.057 -0.144 0.000
H12 -2.057 -0.144 0.000
H13 -1.153 -1.709 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55461.55461.55461.87911.09082.96992.26582.26582.26582.26582.26582.2658
C21.55462.14522.14521.55462.37832.37831.09281.09283.16522.47842.47843.1652
C31.55462.14522.14521.55462.37832.37832.47843.16521.09281.09283.16522.4784
C41.55462.14522.14521.55462.37832.37833.16522.47842.47843.16521.09281.0928
C51.87911.55461.55461.55462.96991.09082.26582.26582.26582.26582.26582.2658
H61.09082.37832.37832.37832.96994.06072.89372.89372.89372.89372.89372.8937
H72.96992.37832.37832.37831.09084.06072.89372.89372.89372.89372.89372.8937
H82.26581.09282.47843.16522.26582.89372.89371.80703.57122.30653.57124.1135
H92.26581.09283.16522.47842.26582.89372.89371.80704.11353.57122.30653.5712
H102.26583.16521.09282.47842.26582.89372.89373.57124.11351.80703.57122.3065
H112.26582.47841.09283.16522.26582.89372.89372.30653.57121.80704.11353.5712
H122.26582.47843.16521.09282.26582.89372.89373.57122.30653.57124.11351.8070
H132.26583.16522.47841.09282.26582.89372.89374.11353.57122.30653.57121.8070

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 74.368 C1 C2 H8 116.629
C1 C2 H9 116.629 C1 C3 C5 74.368
C1 C3 H10 116.629 C1 C3 H11 116.629
C1 C4 C5 74.368 C1 C4 H12 116.629
C1 C4 H13 116.629 C2 C1 C3 87.254
C2 C1 C4 87.254 C2 C1 H6 127.184
C2 C5 C3 87.254 C2 C5 C4 87.254
C2 C5 H7 127.184 C3 C1 C4 87.254
C3 C1 H6 127.184 C3 C5 C4 87.254
C3 C5 H7 127.184 C4 C1 H6 127.184
C4 C5 H7 127.184 C5 C2 H8 116.629
C5 C2 H9 116.629 C5 C3 H10 116.629
C5 C3 H11 116.629 C5 C4 H12 116.629
C5 C4 H13 116.629 H8 C2 H9 111.531
H10 C3 H11 111.531 H12 C4 H13 111.531
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.087      
2 C -0.389      
3 C -0.389      
4 C -0.389      
5 C 0.087      
6 H 0.111      
7 H 0.111      
8 H 0.128      
9 H 0.128      
10 H 0.128      
11 H 0.128      
12 H 0.128      
13 H 0.128      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.456 0.000 0.000
y 0.000 -32.456 0.000
z 0.000 0.000 -32.725
Traceless
 xyz
x 0.134 0.000 0.000
y 0.000 0.134 0.000
z 0.000 0.000 -0.269
Polar
3z2-r2-0.537
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.255 0.000 0.000
y 0.000 8.255 0.000
z 0.000 0.000 7.545


<r2> (average value of r2) Å2
<r2> 92.282
(<r2>)1/2 9.606