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All results from a given calculation for C5H8 (Bicyclo[2.1.0]pentane)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-194.169764
Energy at 298.15K-194.178979
Nuclear repulsion energy175.005389
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 mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3275 3110 16.13      
2 A' 3254 3090 1.63      
3 A' 3180 3020 32.75      
4 A' 3164 3004 12.01      
5 A' 3112 2955 37.62      
6 A' 1549 1471 3.11      
7 A' 1520 1444 6.09      
8 A' 1363 1294 0.17      
9 A' 1253 1189 5.00      
10 A' 1231 1169 0.54      
11 A' 1141 1084 1.48      
12 A' 1051 998 0.11      
13 A' 991 941 6.22      
14 A' 966 917 7.04      
15 A' 911 865 1.70      
16 A' 787 747 1.75      
17 A' 773 734 10.26      
18 A' 435 413 1.35      
19 A" 3256 3092 11.84      
20 A" 3160 3001 0.01      
21 A" 3103 2946 35.77      
22 A" 1526 1449 1.76      
23 A" 1312 1246 13.64      
24 A" 1294 1229 0.66      
25 A" 1252 1189 0.95      
26 A" 1149 1091 3.24      
27 A" 1116 1060 5.48      
28 A" 1085 1030 3.98      
29 A" 1002 951 4.15      
30 A" 953 905 0.00      
31 A" 801 761 17.63      
32 A" 711 675 0.00      
33 A" 271 257 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 25972.1 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 24663.1 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 mPW1PW91/3-21G*
ABC
0.29817 0.20306 0.15862

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.252 -0.551 0.776
C2 -0.252 -0.551 -0.776
C3 -0.252 0.993 0.791
C4 -0.252 0.993 -0.791
C5 0.961 -1.025 0.000
H6 -0.788 -1.188 1.462
H7 -0.788 -1.188 -1.462
H8 0.612 1.452 1.277
H9 0.612 1.452 -1.277
H10 -1.176 1.416 1.189
H11 -1.176 1.416 -1.189
H12 1.864 -0.422 0.000
H13 1.123 -2.098 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55151.54392.19941.51631.07922.38792.23862.99562.21212.92972.25782.2102
C21.55152.19941.54391.51632.38791.07922.99562.23862.92972.21212.25782.2102
C31.54392.19941.58152.48402.34413.18121.09312.28771.09172.22552.66593.4739
C42.19941.54391.58152.48403.18122.34412.28771.09312.22551.09172.66593.4739
C51.51631.51632.48402.48402.28602.28602.80892.80893.45583.45581.08581.0848
H61.07922.38792.34413.18122.28602.92462.99454.05412.64683.73643.12432.5726
H72.38791.07923.18122.34412.28602.92464.05412.99453.73642.64683.12432.5726
H82.23862.99561.09312.28772.80892.99454.05412.55381.79133.04672.59063.8071
H92.99562.23862.28771.09312.80894.05412.99452.55383.04671.79132.59063.8071
H102.21212.92971.09172.22553.45582.64683.73641.79133.04672.37823.74684.3642
H112.92972.21212.22551.09173.45583.73642.64683.04671.79132.37823.74684.3642
H122.25782.25782.66592.66591.08583.12433.12432.59062.59063.74683.74681.8324
H132.21022.21023.47393.47391.08482.57262.57263.80713.80714.36424.36421.8324

picture of Bicyclo[2.1.0]pentane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 90.557 C1 C2 C5 59.229
C1 C2 H7 129.507 C1 C3 C4 89.443
C1 C3 H8 115.125 C1 C3 H10 113.016
C1 C5 C2 61.543 C1 C5 H12 119.465
C1 C5 H13 115.362 C2 C1 C3 90.557
C2 C1 C5 59.229 C2 C1 H6 129.507
C2 C4 C3 89.443 C2 C4 H9 115.125
C2 C4 H11 113.016 C2 C5 H12 119.465
C2 C5 H13 115.362 C3 C1 C5 108.523
C3 C1 H6 125.739 C3 C4 H9 116.407
C3 C4 H11 111.402 C4 C2 C5 108.523
C4 C2 H7 125.739 C4 C3 H8 116.407
C4 C3 H10 111.402 C5 C1 H6 122.579
C5 C2 H7 122.579 H8 C3 H10 110.149
H9 C4 H11 110.149 H12 C5 H13 115.174
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.282      
2 C -0.282      
3 C -0.391      
4 C -0.391      
5 C -0.392      
6 H 0.205      
7 H 0.205      
8 H 0.214      
9 H 0.214      
10 H 0.225      
11 H 0.225      
12 H 0.218      
13 H 0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.239 -0.083 0.000 0.252
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.148 0.159 0.000
y 0.159 -30.293 0.000
z 0.000 0.000 -32.256
Traceless
 xyz
x 0.126 0.159 0.000
y 0.159 1.409 0.000
z 0.000 0.000 -1.535
Polar
3z2-r2-3.071
x2-y2-0.855
xy0.159
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.334 -0.417 0.000
y -0.417 6.965 0.000
z 0.000 0.000 6.496


<r2> (average value of r2) Å2
<r2> 98.573
(<r2>)1/2 9.928