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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-194.664964
Energy at 298.15K-194.674223
HF Energy-193.939963
Nuclear repulsion energy176.788202
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 MP2=FULL/6-31G**
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' 3308 3091 15.38      
2 A' 3283 3067 9.56      
3 A' 3223 3012 41.44      
4 A' 3198 2988 16.16      
5 A' 3145 2939 48.53      
6 A' 1566 1463 0.78      
7 A' 1545 1443 1.43      
8 A' 1420 1327 0.82      
9 A' 1293 1208 0.92      
10 A' 1251 1169 0.23      
11 A' 1170 1093 0.52      
12 A' 1068 998 0.04      
13 A' 1018 951 3.10      
14 A' 984 919 7.38      
15 A' 944 882 0.74      
16 A' 815 761 2.45      
17 A' 810 756 5.24      
18 A' 424 396 0.55      
19 A" 3273 3059 16.81      
20 A" 3207 2997 0.07      
21 A" 3138 2932 41.17      
22 A" 1537 1437 0.01      
23 A" 1354 1265 4.37      
24 A" 1299 1214 1.38      
25 A" 1261 1178 0.01      
26 A" 1157 1081 0.10      
27 A" 1122 1048 3.53      
28 A" 1098 1026 0.01      
29 A" 1033 965 3.93      
30 A" 964 901 0.31      
31 A" 832 777 12.46      
32 A" 688 643 0.15      
33 A" 260 243 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 26343.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 24614.9 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 MP2=FULL/6-31G**
ABC
0.30714 0.20623 0.16144

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.246 -0.538 0.762
C2 -0.246 -0.538 -0.762
C3 -0.246 0.986 0.778
C4 -0.246 0.986 -0.778
C5 0.943 -1.031 0.000
H6 -0.788 -1.180 1.442
H7 -0.788 -1.180 -1.442
H8 0.605 1.454 1.274
H9 0.605 1.454 -1.274
H10 -1.163 1.410 1.183
H11 -1.163 1.410 -1.183
H12 1.862 -0.456 0.000
H13 1.083 -2.102 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52501.52442.16751.49641.07992.35902.22582.97342.19342.90152.24382.1897
C21.52502.16751.52441.49642.35901.07992.97342.22582.90152.19342.24382.1897
C31.52442.16751.55682.46752.32883.14871.09052.27091.08752.20582.67053.4512
C42.16751.52441.55682.46753.14872.32882.27091.09052.20581.08752.67053.4512
C51.49641.49642.46752.46752.25792.25792.81252.81253.43373.43371.08391.0806
H61.07992.35902.32883.14872.25792.88452.98344.03142.62923.70623.10252.5359
H72.35901.07993.14872.32882.25792.88454.03142.98343.70622.62923.10252.5359
H82.22582.97341.09052.27092.81252.98344.03142.54871.77063.02722.61753.8074
H92.97342.22582.27091.09052.81254.03142.98342.54873.02721.77062.61753.8074
H102.19342.90151.08752.20583.43372.62923.70621.77063.02722.36553.74574.3332
H112.90152.19342.20581.08753.43373.70622.62923.02721.77062.36553.74574.3332
H122.24382.24382.67052.67051.08393.10253.10252.61752.61753.74573.74571.8215
H132.18972.18973.45123.45121.08062.53592.53593.80743.80744.33324.33321.8215

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 90.598 C1 C2 C5 59.367
C1 C2 H7 129.011 C1 C3 C4 89.402
C1 C3 H8 115.687 C1 C3 H10 113.169
C1 C5 C2 61.267 C1 C5 H12 119.969
C1 C5 H13 115.410 C2 C1 C3 90.598
C2 C1 C5 59.367 C2 C1 H6 129.011
C2 C4 C3 89.402 C2 C4 H9 115.687
C2 C4 H11 113.169 C2 C5 H12 119.969
C2 C5 H13 115.410 C3 C1 C5 109.534
C3 C1 H6 125.961 C3 C4 H9 117.050
C3 C4 H11 111.827 C4 C2 C5 109.534
C4 C2 H7 125.961 C4 C3 H8 117.050
C4 C3 H10 111.827 C5 C1 H6 121.583
C5 C2 H7 121.583 H8 C3 H10 108.763
H9 C4 H11 108.763 H12 C5 H13 114.597
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability