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

using model chemistry: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-194.208890
Energy at 298.15K-194.218069
Nuclear repulsion energy174.323185
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3240 3126 21.28      
2 A' 3220 3107 1.96      
3 A' 3147 3037 40.92      
4 A' 3135 3025 13.06      
5 A' 3085 2976 42.23      
6 A' 1549 1495 1.91      
7 A' 1522 1469 3.97      
8 A' 1350 1302 0.26      
9 A' 1242 1198 3.56      
10 A' 1222 1180 0.35      
11 A' 1126 1086 1.32      
12 A' 1040 1003 0.09      
13 A' 972 938 5.30      
14 A' 948 915 6.50      
15 A' 892 861 1.46      
16 A' 780 753 2.21      
17 A' 751 724 7.80      
18 A' 430 415 1.07      
19 A" 3222 3109 14.69      
20 A" 3127 3018 0.04      
21 A" 3075 2967 38.80      
22 A" 1529 1476 0.83      
23 A" 1302 1256 10.09      
24 A" 1289 1244 0.28      
25 A" 1245 1202 0.64      
26 A" 1141 1101 2.29      
27 A" 1108 1069 4.87      
28 A" 1078 1040 2.79      
29 A" 988 953 3.69      
30 A" 941 908 0.13      
31 A" 782 755 15.00      
32 A" 705 681 0.14      
33 A" 271 261 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 25727.0 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 24824.0 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/3-21G
ABC
0.29631 0.20110 0.15693

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.252 -0.551 0.779
C2 -0.252 -0.551 -0.779
C3 -0.252 1.000 0.795
C4 -0.252 1.000 -0.795
C5 0.962 -1.037 0.000
H6 -0.793 -1.186 1.465
H7 -0.793 -1.186 -1.465
H8 0.613 1.461 1.280
H9 0.613 1.461 -1.280
H10 -1.176 1.423 1.195
H11 -1.176 1.423 -1.195
H12 1.873 -0.445 0.000
H13 1.114 -2.112 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.55831.55072.20951.52241.08022.39462.24663.00622.21852.94032.26622.2157
C21.55832.20951.55071.52242.39461.08023.00622.24662.94032.21852.26622.2157
C31.55072.20951.58982.50072.34923.19041.09372.29501.09222.23422.69003.4897
C42.20951.55071.58982.50073.19042.34922.29501.09372.23421.09222.69003.4897
C51.52241.52242.50072.50072.29142.29142.82852.82853.47123.47121.08651.0855
H61.08022.39462.34923.19042.29142.93093.00284.06462.65043.74543.13142.5772
H72.39461.08023.19042.34922.29142.93094.06463.00283.74542.65043.13142.5772
H82.24663.00621.09372.29502.82853.00284.06462.56041.79153.05412.61933.8280
H93.00622.24662.29501.09372.82854.06463.00282.56043.05411.79152.61933.8280
H102.21852.94031.09222.23423.47122.65043.74541.79153.05412.38943.77034.3777
H112.94032.21852.23421.09223.47123.74542.65043.05411.79152.38943.77034.3777
H122.26622.26622.69002.69001.08653.13143.13142.61932.61933.77033.77031.8313
H132.21572.21573.48973.48971.08552.57722.57723.82803.82804.37774.37771.8313

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 90.582 C1 C2 C5 59.216
C1 C2 H7 129.446 C1 C3 C4 89.418
C1 C3 H8 115.236 C1 C3 H10 113.013
C1 C5 C2 61.569 C1 C5 H12 119.673
C1 C5 H13 115.323 C2 C1 C3 90.582
C2 C1 C5 59.216 C2 C1 H6 129.446
C2 C4 C3 89.418 C2 C4 H9 115.236
C2 C4 H11 113.013 C2 C5 H12 119.673
C2 C5 H13 115.323 C3 C1 C5 108.923
C3 C1 H6 125.547 C3 C4 H9 116.341
C3 C4 H11 111.472 C4 C2 C5 108.923
C4 C2 H7 125.547 C4 C3 H8 116.341
C4 C3 H10 111.472 C5 C1 H6 122.480
C5 C2 H7 122.480 H8 C3 H10 110.077
H9 C4 H11 110.077 H12 C5 H13 114.954
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.240     -0.044
2 C -0.240     -0.044
3 C -0.337     -0.211
4 C -0.337     -0.211
5 C -0.340     -0.479
6 H 0.171     0.103
7 H 0.171     0.103
8 H 0.185     0.103
9 H 0.185     0.103
10 H 0.195     0.100
11 H 0.195     0.100
12 H 0.189     0.187
13 H 0.202     0.190


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.241 -0.089 0.000 0.257
CHELPG        
AIM        
ESP -0.204 -0.099 0.000 0.226


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.365 0.154 0.000
y 0.154 -30.578 0.000
z 0.000 0.000 -32.390
Traceless
 xyz
x 0.118 0.154 0.000
y 0.154 1.300 0.000
z 0.000 0.000 -1.418
Polar
3z2-r2-2.836
x2-y2-0.788
xy0.154
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.227 0.004 0.074
y 0.004 6.539 0.003
z 0.074 0.003 6.178


<r2> (average value of r2) Å2
<r2> 99.411
(<r2>)1/2 9.970