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

using model chemistry: BLYP/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 BLYP/3-21G*
 hartrees
Energy at 0K-194.087313
Energy at 298.15K-194.096310
Nuclear repulsion energy172.887499
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 BLYP/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' 3151 3131 29.10      
2 A' 3134 3114 0.75      
3 A' 3063 3044 47.18      
4 A' 3051 3031 15.36      
5 A' 3000 2981 48.99      
6 A' 1512 1502 1.18      
7 A' 1485 1475 2.66      
8 A' 1304 1296 0.52      
9 A' 1199 1191 2.96      
10 A' 1187 1179 0.19      
11 A' 1086 1079 1.27      
12 A' 1006 1000 0.03      
13 A' 940 934 4.42      
14 A' 904 898 7.33      
15 A' 861 856 1.50      
16 A' 756 751 2.14      
17 A' 709 705 6.33      
18 A' 414 412 1.04      
19 A" 3132 3111 19.10      
20 A" 3043 3023 0.17      
21 A" 2991 2972 42.48      
22 A" 1494 1484 0.33      
23 A" 1259 1250 8.03      
24 A" 1247 1239 0.39      
25 A" 1209 1201 0.68      
26 A" 1101 1094 1.64      
27 A" 1063 1056 6.16      
28 A" 1034 1028 1.35      
29 A" 957 951 3.27      
30 A" 908 902 0.14      
31 A" 753 748 12.47      
32 A" 676 672 0.16      
33 A" 262 260 0.38      

Unscaled Zero Point Vibrational Energy (zpe) 24945.7 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 24783.5 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 BLYP/3-21G*
ABC
0.29154 0.19784 0.15412

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.253 -0.554 0.788
C2 -0.253 -0.554 -0.788
C3 -0.253 1.009 0.801
C4 -0.253 1.009 -0.801
C5 0.968 -1.050 0.000
H6 -0.799 -1.192 1.479
H7 -0.799 -1.192 -1.479
H8 0.617 1.474 1.289
H9 0.617 1.474 -1.289
H10 -1.184 1.434 1.203
H11 -1.184 1.434 -1.203
H12 1.890 -0.461 0.000
H13 1.111 -2.133 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.57631.56212.22861.53581.08782.41802.26313.03082.23352.96322.28542.2309
C21.57632.22861.56211.53582.41801.08783.03082.26312.96322.23352.28542.2309
C31.56212.22861.60272.52372.36643.21581.10142.31191.09952.25052.71943.5173
C42.22861.56211.60272.52373.21582.36642.31191.10142.25051.09952.71943.5173
C51.53581.53582.52372.52372.30902.30902.85572.85573.49953.49951.09391.0927
H61.08782.41802.36643.21582.30902.95853.02544.09642.66823.77313.15512.5929
H72.41801.08783.21582.36642.30902.95854.09643.02543.77312.66823.15512.5929
H82.26313.03081.10142.31192.85573.02544.09642.57821.80433.07542.65083.8624
H93.03082.26312.31191.10142.85574.09643.02542.57823.07541.80432.65083.8624
H102.23352.96321.09952.25053.49952.66823.77311.80433.07542.40583.80634.4087
H112.96322.23352.25051.09953.49953.77312.66823.07541.80432.40583.80634.4087
H122.28542.28542.71942.71941.09393.15513.15512.65082.65083.80633.80631.8444
H132.23092.23093.51733.51731.09272.59292.59293.86243.86244.40874.40871.8444

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 90.484 C1 C2 C5 59.123
C1 C2 H7 129.442 C1 C3 C4 89.516
C1 C3 H8 115.261 C1 C3 H10 112.943
C1 C5 C2 61.755 C1 C5 H12 119.766
C1 C5 H13 115.110 C2 C1 C3 90.484
C2 C1 C5 59.123 C2 C1 H6 129.442
C2 C4 C3 89.516 C2 C4 H9 115.261
C2 C4 H11 112.943 C2 C5 H12 119.766
C2 C5 H13 115.110 C3 C1 C5 109.105
C3 C1 H6 125.556 C3 C4 H9 116.285
C3 C4 H11 111.420 C4 C2 C5 109.105
C4 C2 H7 125.556 C4 C3 H8 116.285
C4 C3 H10 111.420 C5 C1 H6 122.387
C5 C2 H7 122.387 H8 C3 H10 110.127
H9 C4 H11 110.127 H12 C5 H13 115.027
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.211      
2 C -0.211      
3 C -0.311      
4 C -0.311      
5 C -0.315      
6 H 0.151      
7 H 0.151      
8 H 0.170      
9 H 0.170      
10 H 0.180      
11 H 0.180      
12 H 0.173      
13 H 0.186      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.239 -0.090 0.000 0.256
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.466 0.140 0.000
y 0.140 -30.687 0.000
z 0.000 0.000 -32.438
Traceless
 xyz
x 0.097 0.140 0.000
y 0.140 1.265 0.000
z 0.000 0.000 -1.362
Polar
3z2-r2-2.723
x2-y2-0.779
xy0.140
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 100.814
(<r2>)1/2 10.041