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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-194.338135
Energy at 298.15K-194.347330
HF Energy-193.833819
Nuclear repulsion energy173.248192
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
4/u)
Dep P Dep U
1 A' 3204 3087 30.29      
2 A' 3185 3069 4.09      
3 A' 3100 2987 28.19      
4 A' 3096 2983 47.24      
5 A' 3037 2927 47.66      
6 A' 1555 1498 1.09      
7 A' 1530 1474 2.55      
8 A' 1378 1328 0.63      
9 A' 1268 1222 1.48      
10 A' 1222 1177 0.46      
11 A' 1134 1092 1.19      
12 A' 1055 1017 0.34      
13 A' 980 944 7.34      
14 A' 964 929 1.69      
15 A' 897 865 1.36      
16 A' 803 773 1.29      
17 A' 757 730 7.45      
18 A' 424 408 0.52      
19 A" 3186 3070 18.10      
20 A" 3076 2964 0.06      
21 A" 3026 2916 44.62      
22 A" 1537 1481 0.30      
23 A" 1320 1271 3.74      
24 A" 1305 1258 2.28      
25 A" 1239 1194 0.03      
26 A" 1162 1120 1.49      
27 A" 1144 1103 3.62      
28 A" 1103 1063 0.96      
29 A" 997 960 3.87      
30 A" 950 916 0.17      
31 A" 782 754 14.82      
32 A" 708 683 0.00      
33 A" 266 257 0.31      

Unscaled Zero Point Vibrational Energy (zpe) 25694.8 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 24759.5 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 QCISD/6-31G
ABC
0.29478 0.19778 0.15426

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 -0.251 -0.549 0.781
C2 -0.251 -0.549 -0.781
C3 -0.251 1.009 0.797
C4 -0.251 1.009 -0.797
C5 0.960 -1.061 0.000
H6 -0.802 -1.184 1.474
H7 -0.802 -1.184 -1.474
H8 0.613 1.482 1.293
H9 0.613 1.482 -1.293
H10 -1.176 1.438 1.212
H11 -1.176 1.438 -1.212
H12 1.892 -0.487 0.000
H13 1.109 -2.143 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.56261.55792.21781.52991.08912.40692.26583.02872.23352.96272.28252.2369
C21.56262.21781.55791.52992.40691.08913.02872.26582.96272.23352.28252.2369
C31.55792.21781.59452.52742.36003.20481.10262.31041.10092.25352.73283.5248
C42.21781.55791.59452.52743.20482.36002.31041.10262.25351.10092.73283.5248
C51.52991.52992.52742.52742.30062.30062.87402.87403.50413.50411.09481.0927
H61.08912.40692.36003.20482.30062.94833.02364.09442.66123.77243.14922.5971
H72.40691.08913.20482.36002.30062.94834.09443.02363.77242.66123.14922.5971
H82.26583.02871.10262.31042.87403.02364.09442.58521.79123.07852.68063.8812
H93.02872.26582.31041.10262.87404.09443.02362.58523.07851.79122.68063.8812
H102.23352.96271.10092.25353.50412.66123.77241.79123.07852.42493.81984.4180
H112.96272.23352.25351.10093.50413.77242.66123.07851.79122.42493.81984.4180
H122.28252.28252.73282.73281.09483.14923.14922.68062.68063.81983.81981.8326
H132.23692.23693.52483.52481.09272.59712.59713.88123.88124.41804.41801.8326

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 90.588 C1 C2 C5 59.290
C1 C2 H7 129.506 C1 C3 C4 89.412
C1 C3 H8 115.717 C1 C3 H10 113.165
C1 C5 C2 61.420 C1 C5 H12 119.917
C1 C5 H13 116.069 C2 C1 C3 90.588
C2 C1 C5 59.290 C2 C1 H6 129.506
C2 C4 C3 89.412 C2 C4 H9 115.717
C2 C4 H11 113.165 C2 C5 H12 119.917
C2 C5 H13 116.069 C3 C1 C5 109.870
C3 C1 H6 125.204 C3 C4 H9 116.695
C3 C4 H11 112.156 C4 C2 C5 109.870
C4 C2 H7 125.204 C4 C3 H8 116.695
C4 C3 H10 112.156 C5 C1 H6 122.002
C5 C2 H7 122.002 H8 C3 H10 108.763
H9 C4 H11 108.763 H12 C5 H13 113.804
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability