return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: MP2=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-155.662646
Energy at 298.15K-155.668448
HF Energy-154.942852
Nuclear repulsion energy109.961907
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 MP2=FULL/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3196 3035 9.03      
2 A1 3182 3021 5.74      
3 A1 1856 1762 2.65      
4 A1 1509 1433 0.19      
5 A1 1468 1394 0.90      
6 A1 1084 1029 4.47      
7 A1 1038 986 5.37      
8 A1 761 723 4.37      
9 A2 3256 3091 0.00      
10 A2 1182 1122 0.00      
11 A2 971 922 0.00      
12 A2 626 594 0.00      
13 B1 3268 3102 5.81      
14 B1 1108 1052 1.87      
15 B1 950 902 40.24      
16 B1 764 726 1.69      
17 B1 289 274 4.57      
18 B2 3273 3107 5.63      
19 B2 3177 3016 7.93      
20 B2 1468 1394 2.23      
21 B2 1161 1102 6.98      
22 B2 1074 1020 1.64      
23 B2 929 882 14.88      
24 B2 359 340 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 18973.9 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 18013.8 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 MP2=FULL/cc-pVTZ
ABC
0.65918 0.23192 0.18406

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.649
C2 0.000 0.000 0.306
H3 0.000 0.894 2.166
H4 0.000 -0.894 2.166
C5 0.000 0.747 -0.891
C6 0.000 -0.747 -0.891
H7 0.916 0.928 -1.342
H8 -0.916 0.928 -1.342
H9 -0.916 -0.928 -1.342
H10 0.916 -0.928 -1.342

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.34321.03331.03332.64722.64723.26333.26333.26333.2633
C21.34322.06442.06441.41061.41062.10182.10182.10182.1018
H31.03332.06441.78883.06043.46993.62663.62664.05864.0586
H41.03332.06441.78883.46993.06044.05864.05863.62663.6266
C52.64721.41063.06043.46991.49461.03761.03761.96241.9624
C62.64721.41063.46993.06041.49461.96241.96241.03761.0376
H73.26332.10183.62664.05861.03761.96241.83292.60861.8561
H83.26332.10183.62664.05861.03761.96241.83291.85612.6086
H93.26332.10184.05863.62661.96241.03762.60861.85611.8329
H103.26332.10184.05863.62661.96241.03761.85612.60861.8329

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.008 C1 C2 C6 148.008
C2 C1 H3 120.050 C2 C1 H4 120.050
C2 C5 C6 58.008 C2 C5 H7 117.488
C2 C5 H8 117.488 C2 C6 C5 58.008
C2 C6 H9 117.488 C2 C6 H10 117.488
H3 C1 H4 119.900 C5 C2 C6 63.984
C5 C6 H9 100.032 C5 C6 H10 100.032
C6 C5 H7 100.032 C6 C5 H8 100.032
H7 C5 H8 124.068 H9 C6 H10 124.068
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability