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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-194.623245
Energy at 298.15K-194.632484
HF Energy-193.925821
Nuclear repulsion energy175.817354
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 QCISD/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' 3229 3075 27.02      
2 A' 3214 3061 4.79      
3 A' 3142 2992 54.87      
4 A' 3136 2986 15.03      
5 A' 3082 2935 51.06      
6 A' 1561 1486 0.72      
7 A' 1537 1464 2.18      
8 A' 1413 1345 0.56      
9 A' 1292 1230 1.18      
10 A' 1245 1185 0.20      
11 A' 1161 1106 0.45      
12 A' 1062 1011 0.01      
13 A' 1009 961 2.99      
14 A' 977 930 7.44      
15 A' 936 892 0.23      
16 A' 811 772 0.54      
17 A' 805 766 7.73      
18 A' 425 405 0.55      
19 A" 3207 3054 21.49      
20 A" 3125 2976 0.34      
21 A" 3073 2927 44.84      
22 A" 1534 1461 0.09      
23 A" 1350 1286 4.47      
24 A" 1297 1235 1.25      
25 A" 1252 1192 0.02      
26 A" 1160 1105 0.02      
27 A" 1120 1067 3.49      
28 A" 1092 1039 0.28      
29 A" 1022 973 3.86      
30 A" 963 917 0.15      
31 A" 821 782 14.05      
32 A" 703 669 0.09      
33 A" 268 255 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 26009.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 24769.2 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 QCISD/6-31G*
ABC
0.30460 0.20361 0.15953

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.247 -0.540 0.765
C2 -0.247 -0.540 -0.765
C3 -0.247 0.993 0.782
C4 -0.247 0.993 -0.782
C5 0.946 -1.042 0.000
H6 -0.799 -1.181 1.449
H7 -0.799 -1.181 -1.449
H8 0.611 1.465 1.281
H9 0.611 1.465 -1.281
H10 -1.168 1.419 1.194
H11 -1.168 1.419 -1.194
H12 1.878 -0.473 0.000
H13 1.083 -2.122 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52901.53252.17711.50281.08802.36932.24062.98942.20712.91932.25912.2038
C21.52902.17711.53251.50282.36931.08802.98942.24062.91932.20712.25912.2038
C31.53252.17711.56392.48442.33953.16291.09852.28301.09582.22152.69733.4758
C42.17711.53251.56392.48443.16292.33952.28301.09852.22151.09582.69733.4758
C51.50281.50282.48442.48442.27182.27182.83492.83493.45703.45701.09211.0889
H61.08802.36932.33953.16292.27182.89713.00244.05402.63853.72553.12492.5547
H72.36931.08803.16292.33952.27182.89714.05403.00243.72552.63853.12492.5547
H82.24062.98941.09852.28302.83493.00244.05402.56131.78143.04792.64653.8379
H92.98942.24062.28301.09852.83494.05403.00242.56133.04791.78142.64653.8379
H102.20712.91931.09582.22153.45702.63853.72551.78143.04792.38783.77994.3629
H112.91932.20712.22151.09583.45703.72552.63853.04791.78142.38783.77994.3629
H122.25912.25912.69732.69731.09213.12493.12492.64652.64653.77993.77991.8303
H132.20382.20383.47583.47581.08892.55472.55473.83793.83794.36294.36291.8303

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 90.651 C1 C2 C5 59.420
C1 C2 H7 128.955 C1 C3 C4 89.349
C1 C3 H8 115.790 C1 C3 H10 113.177
C1 C5 C2 61.160 C1 C5 H12 120.233
C1 C5 H13 115.573 C2 C1 C3 90.651
C2 C1 C5 59.420 C2 C1 H6 128.955
C2 C4 C3 89.349 C2 C4 H9 115.790
C2 C4 H11 113.177 C2 C5 H12 120.233
C2 C5 H13 115.573 C3 C1 C5 109.870
C3 C1 H6 125.589 C3 C4 H9 117.001
C3 C4 H11 112.083 C4 C2 C5 109.870
C4 C2 H7 125.589 C4 C3 H8 117.001
C4 C3 H10 112.083 C5 C1 H6 121.717
C5 C2 H7 121.717 H8 C3 H10 108.551
H9 C4 H11 108.551 H12 C5 H13 114.115
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability