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

using model chemistry: QCISD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-194.691264
Energy at 298.15K-194.700463
HF Energy-193.957566
Nuclear repulsion energy175.519485
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/6-311G*
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' 3207 3070 30.41      
2 A' 3189 3053 6.38      
3 A' 3122 2989 56.82      
4 A' 3107 2975 20.93      
5 A' 3058 2928 58.94      
6 A' 1543 1477 1.45      
7 A' 1518 1453 3.94      
8 A' 1391 1331 0.24      
9 A' 1275 1221 1.82      
10 A' 1230 1178 0.09      
11 A' 1146 1097 0.60      
12 A' 1045 1001 0.20      
13 A' 998 956 3.18      
14 A' 957 916 7.84      
15 A' 922 883 0.68      
16 A' 797 763 0.69      
17 A' 787 753 9.34      
18 A' 419 402 0.57      
19 A" 3181 3045 23.79      
20 A" 3103 2971 0.43      
21 A" 3048 2919 49.73      
22 A" 1515 1450 0.74      
23 A" 1329 1272 6.75      
24 A" 1277 1223 1.81      
25 A" 1243 1190 0.10      
26 A" 1143 1094 0.13      
27 A" 1100 1054 4.71      
28 A" 1067 1021 0.31      
29 A" 1005 962 4.14      
30 A" 948 908 0.19      
31 A" 811 776 16.89      
32 A" 695 666 0.09      
33 A" 261 249 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 25718.0 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 24622.5 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/6-311G*
ABC
0.30323 0.20305 0.15895

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.247 -0.541 0.768
C2 -0.247 -0.541 -0.768
C3 -0.247 0.995 0.783
C4 -0.247 0.995 -0.783
C5 0.948 -1.042 0.000
H6 -0.798 -1.185 1.450
H7 -0.798 -1.185 -1.450
H8 0.610 1.465 1.282
H9 0.610 1.465 -1.282
H10 -1.169 1.421 1.193
H11 -1.169 1.421 -1.193
H12 1.877 -0.470 0.000
H13 1.084 -2.122 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.53681.53572.18301.50681.08732.37482.24092.99362.20872.92352.26042.2050
C21.53682.18301.53571.50682.37481.08732.99362.24092.92352.20872.26042.2050
C31.53572.18301.56642.48832.34473.16871.09792.28501.09512.22222.69703.4784
C42.18301.53571.56642.48833.16872.34472.28501.09792.22221.09512.69703.4784
C51.50681.50682.48832.48832.27382.27382.83592.83593.46013.46011.09131.0882
H61.08732.37482.34473.16872.27382.90043.00514.05792.64433.73033.12552.5536
H72.37481.08733.16872.34472.27382.90044.05793.00513.73032.64433.12552.5536
H82.24092.99361.09792.28502.83593.00514.05792.56371.78223.04882.64433.8382
H92.99362.24092.28501.09792.83594.05793.00512.56373.04881.78222.64433.8382
H102.20872.92351.09512.22223.46012.64433.73031.78223.04882.38693.77904.3647
H112.92352.20872.22221.09513.46013.73032.64433.04881.78222.38693.77904.3647
H122.26042.26042.69702.69701.09133.12553.12552.64432.64433.77903.77901.8325
H132.20502.20503.47843.47841.08822.55362.55363.83823.83824.36474.36471.8325

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 90.552 C1 C2 C5 59.338
C1 C2 H7 128.833 C1 C3 C4 89.448
C1 C3 H8 115.620 C1 C3 H10 113.122
C1 C5 C2 61.325 C1 C5 H12 120.071
C1 C5 H13 115.415 C2 C1 C3 90.552
C2 C1 C5 59.338 C2 C1 H6 128.833
C2 C4 C3 89.448 C2 C4 H9 115.620
C2 C4 H11 113.122 C2 C5 H12 120.071
C2 C5 H13 115.415 C3 C1 C5 109.738
C3 C1 H6 125.876 C3 C4 H9 117.014
C3 C4 H11 111.999 C4 C2 C5 109.738
C4 C2 H7 125.876 C4 C3 H8 117.014
C4 C3 H10 111.999 C5 C1 H6 121.615
C5 C2 H7 121.615 H8 C3 H10 108.714
H9 C4 H11 108.714 H12 C5 H13 114.443
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability