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All results from a given calculation for C5H6 (Bicyclo[2.1.0]pent-2-ene)

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-193.393182
Energy at 298.15K-193.399499
HF Energy-192.709107
Nuclear repulsion energy159.964503
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 3247 3092 8.28      
2 A 3238 3083 39.77      
3 A 3224 3071 3.73      
4 A 3139 2989 25.09      
5 A 1623 1546 3.59      
6 A 1525 1453 0.85      
7 A 1348 1283 0.37      
8 A 1235 1176 1.41      
9 A 1138 1084 1.28      
10 A 1063 1013 1.61      
11 A 988 941 3.04      
12 A 909 866 3.51      
13 A 836 796 0.13      
14 A 749 713 59.69      
15 A 435 414 5.75      
16 A 3230 3076 19.03      
17 A 3212 3059 5.39      
18 A 1353 1289 19.74      
19 A 1256 1196 0.25      
20 A 1124 1070 4.87      
21 A 1092 1040 5.36      
22 A 1071 1020 1.62      
23 A 971 925 1.72      
24 A 888 846 9.96      
25 A 838 798 5.09      
26 A 808 770 24.25      
27 A 464 442 1.89      

Unscaled Zero Point Vibrational Energy (zpe) 20501.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 19523.9 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 QCISD/6-31G*
ABC
0.36193 0.21672 0.17371

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 -0.268 1.057 0.675
C2 -0.268 1.057 -0.675
C3 -0.268 -0.462 0.761
C4 -0.268 -0.462 -0.761
C5 0.924 -1.011 0.000
H6 -0.119 1.827 1.429
H7 -0.119 1.827 -1.429
H8 -0.886 -1.083 1.404
H9 -0.886 -1.083 -1.404
H10 1.864 -0.460 0.000
H11 1.031 -2.098 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.34991.52192.09062.48021.08802.24532.34403.04702.70193.4775
C21.34992.09061.52192.48022.24531.08803.04702.34402.70193.4775
C31.52192.09061.52201.51642.38973.17181.08662.33532.26342.2225
C42.09061.52191.52201.51643.17182.38972.33531.08662.26342.2225
C52.48022.48021.51641.51643.34423.34422.29132.29131.08971.0919
H61.08802.24532.38973.17183.34422.85763.01014.13323.34724.3321
H72.24531.08803.17182.38973.34422.85764.13323.01013.34724.3321
H82.34403.04701.08662.33532.29133.01014.13322.80763.14952.5832
H93.04702.34402.33531.08662.29134.13323.01012.80763.14952.5832
H102.70192.70192.26342.26341.08973.34723.34723.14953.14951.8373
H113.47753.47752.22252.22251.09194.33214.33212.58322.58321.8373

picture of Bicyclo[2.1.0]pent-2-ene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 93.241 C1 C2 H7 133.859
C1 C3 C4 86.759 C1 C3 C5 109.434
C1 C3 H8 127.156 C2 C1 C3 93.241
C2 C1 H6 133.859 C2 C4 C3 86.759
C2 C4 C5 109.434 C2 C4 H9 127.156
C3 C1 H6 131.884 C3 C4 C5 59.878
C3 C4 H9 126.269 C3 C5 C4 60.245
C3 C5 H10 119.669 C3 C5 H11 115.922
C4 C2 H7 131.884 C4 C3 C5 59.878
C4 C3 H8 126.269 C4 C5 H10 119.669
C4 C5 H11 115.922 C5 C3 H8 122.484
C5 C4 H9 122.484 H10 C5 H11 114.734
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability