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

using model chemistry: B3LYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G*
 hartrees
Energy at 0K-195.280246
Energy at 298.15K-195.289398
Nuclear repulsion energy175.634493
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 B3LYP/6-31G*
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' 3206 3078 31.49      
2 A' 3188 3062 8.28      
3 A' 3122 2998 58.05      
4 A' 3109 2986 22.59      
5 A' 3059 2938 64.02      
6 A' 1537 1476 0.58      
7 A' 1513 1453 1.37      
8 A' 1383 1328 1.39      
9 A' 1262 1212 0.86      
10 A' 1227 1178 0.31      
11 A' 1142 1097 0.35      
12 A' 1039 998 0.02      
13 A' 990 950 2.42      
14 A' 949 911 7.55      
15 A' 916 879 1.01      
16 A' 793 761 1.13      
17 A' 779 748 6.66      
18 A' 416 399 0.59      
19 A" 3181 3055 28.84      
20 A" 3104 2981 1.25      
21 A" 3050 2929 52.59      
22 A" 1511 1451 0.00      
23 A" 1325 1272 3.72      
24 A" 1276 1226 0.80      
25 A" 1236 1187 0.05      
26 A" 1136 1091 0.02      
27 A" 1091 1048 3.10      
28 A" 1067 1024 0.10      
29 A" 1000 960 3.71      
30 A" 943 906 0.10      
31 A" 801 769 12.23      
32 A" 687 660 0.03      
33 A" 268 257 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 25652.0 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 24633.6 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 B3LYP/6-31G*
ABC
0.30470 0.20282 0.15871

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 -0.538 0.766
C2 -0.246 -0.538 -0.766
C3 -0.246 0.996 0.783
C4 -0.246 0.996 -0.783
C5 0.943 -1.051 0.000
H6 -0.801 -1.174 1.450
H7 -0.801 -1.174 -1.450
H8 0.610 1.471 1.280
H9 0.610 1.471 -1.280
H10 -1.166 1.422 1.194
H11 -1.166 1.422 -1.194
H12 1.882 -0.497 0.000
H13 1.067 -2.132 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.53231.53412.18011.50431.08662.37132.24282.99202.20702.92062.26212.2022
C21.53232.18011.53411.50432.37131.08662.99202.24282.92062.20702.26212.2022
C31.53412.18011.56602.49352.33753.16291.09722.28301.09402.22172.71483.4812
C42.18011.53411.56602.49353.16292.33752.28301.09722.22171.09402.71483.4812
C51.50431.50432.49352.49352.27082.27082.84772.84773.46253.46251.09111.0875
H61.08662.37132.33753.16292.27082.89933.00264.05422.63453.72333.12422.5507
H72.37131.08663.16292.33752.27082.89934.05423.00263.72332.63453.12422.5507
H82.24282.99201.09722.28302.84773.00264.05422.55961.77833.04532.66983.8502
H92.99202.24282.28301.09722.84774.05423.00262.55963.04531.77832.66983.8502
H102.20702.92061.09402.22173.46252.63453.72331.77833.04532.38783.79454.3634
H112.92062.20702.22171.09403.46253.72332.63453.04531.77832.38783.79454.3634
H122.26212.26212.71482.71481.09113.12423.12422.66982.66983.79453.79451.8272
H132.20222.20223.48123.48121.08752.55072.55073.85023.85024.36344.36341.8272

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 90.630 C1 C2 C5 59.382
C1 C2 H7 128.979 C1 C3 C4 89.370
C1 C3 H8 115.941 C1 C3 H10 113.173
C1 C5 C2 61.236 C1 C5 H12 120.451
C1 C5 H13 115.418 C2 C1 C3 90.630
C2 C1 C5 59.382 C2 C1 H6 128.979
C2 C4 C3 89.370 C2 C4 H9 115.941
C2 C4 H11 113.173 C2 C5 H12 120.451
C2 C5 H13 115.418 C3 C1 C5 110.299
C3 C1 H6 125.373 C3 C4 H9 116.923
C3 C4 H11 112.060 C4 C2 C5 110.299
C4 C2 H7 125.373 C4 C3 H8 116.923
C4 C3 H10 112.060 C5 C1 H6 121.606
C5 C2 H7 121.606 H8 C3 H10 108.497
H9 C4 H11 108.497 H12 C5 H13 114.003
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.113 -0.021   0.001
2 C -0.113 -0.021   0.001
3 C -0.276 -0.043   -0.160
4 C -0.276 -0.372   -0.160
5 C -0.317 -0.043   -0.456
6 H 0.131 0.055   0.069
7 H 0.131 0.055   0.069
8 H 0.133 0.027   0.075
9 H 0.133 0.029   0.075
10 H 0.141 0.145   0.073
11 H 0.141 0.131   0.073
12 H 0.140 0.029   0.167
13 H 0.147 0.027   0.171


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.260 -0.080 0.000 0.272
CHELPG 0.003 0.000 -0.209 0.209
AIM        
ESP -0.219 -0.091 0.000 0.237


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.048 0.149 0.000
y 0.149 -30.541 0.000
z 0.000 0.000 -32.117
Traceless
 xyz
x 0.281 0.149 0.000
y 0.149 1.041 0.000
z 0.000 0.000 -1.322
Polar
3z2-r2-2.644
x2-y2-0.507
xy0.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.622 0.001 -0.035
y 0.001 6.862 -0.000
z -0.035 -0.000 6.591


<r2> (average value of r2) Å2
<r2> 98.377
(<r2>)1/2 9.918