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

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-192.107450
Energy at 298.15K-192.113713
HF Energy-191.618147
Nuclear repulsion energy157.562724
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 CCD/3-21G*
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 3265 3123 3.91      
2 A 3236 3095 23.14      
3 A 3226 3086 5.40      
4 A 3129 2992 16.40      
5 A 1556 1489 3.10      
6 A 1531 1464 1.31      
7 A 1286 1230 0.68      
8 A 1174 1123 2.88      
9 A 1113 1064 3.02      
10 A 1013 969 0.52      
11 A 949 908 0.62      
12 A 920 880 7.83      
13 A 791 757 5.72      
14 A 742 710 61.21      
15 A 444 425 6.67      
16 A 3249 3107 5.63      
17 A 3202 3063 7.90      
18 A 1319 1262 21.61      
19 A 1261 1206 0.00      
20 A 1156 1106 5.02      
21 A 1102 1054 8.92      
22 A 1077 1030 0.49      
23 A 914 874 9.62      
24 A 862 824 0.00      
25 A 850 813 0.06      
26 A 761 728 18.51      
27 A 457 437 2.40      

Unscaled Zero Point Vibrational Energy (zpe) 20291.6 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 19408.9 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 CCD/3-21G*
ABC
0.34753 0.21079 0.16905

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.277 1.071 0.680
C2 -0.277 1.071 -0.680
C3 -0.277 -0.485 0.783
C4 -0.277 -0.485 -0.783
C5 0.955 -1.004 0.000
H6 -0.145 1.843 1.429
H7 -0.145 1.843 -1.429
H8 -0.872 -1.098 1.445
H9 -0.872 -1.098 -1.445
H10 1.865 -0.411 0.000
H11 1.094 -2.086 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
C11.36021.55872.13512.50701.08422.25012.37563.09422.69223.5086
C21.36022.13511.55872.50702.25011.08423.09422.37562.69223.5086
C31.55872.13511.56541.54922.41973.21391.08122.38582.28222.2493
C42.13511.55871.56541.54923.21392.41972.38581.08122.28222.2493
C52.50702.50701.54921.54923.37053.37052.33082.33081.08701.0910
H61.08422.25012.41973.21393.37052.85803.03044.17633.34144.3612
H72.25011.08423.21392.41973.37052.85804.17633.03043.34144.3612
H82.37563.09421.08122.38582.33083.03044.17632.88943.17072.6325
H93.09422.37562.38581.08122.33084.17633.03042.88943.17072.6325
H102.69222.69222.28222.28221.08703.34143.34143.17073.17071.8442
H113.50863.50862.24932.24931.09104.36124.36122.63252.63251.8442

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 93.775 C1 C2 H7 133.691
C1 C3 C4 86.225 C1 C3 C5 107.542
C1 C3 H8 127.362 C2 C1 C3 93.775
C2 C1 H6 133.691 C2 C4 C3 86.225
C2 C4 C5 107.542 C2 C4 H9 127.362
C3 C1 H6 131.735 C3 C4 C5 59.652
C3 C4 H9 127.757 C3 C5 C4 60.695
C3 C5 H10 118.888 C3 C5 H11 115.759
C4 C2 H7 131.735 C4 C3 C5 59.652
C4 C3 H8 127.757 C4 C5 H10 118.888
C4 C5 H11 115.759 C5 C3 H8 123.809
C5 C4 H9 123.809 H10 C5 H11 115.720
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability