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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-25.886236
Energy at 298.15K-25.891887
HF Energy-25.371100
Nuclear repulsion energy58.444824
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/CEP-121G*
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 3166 3016 14.52      
2 A1 3150 3002 9.97      
3 A1 1811 1726 1.23      
4 A1 1506 1435 0.01      
5 A1 1458 1389 0.39      
6 A1 1064 1014 9.85      
7 A1 1054 1004 1.37      
8 A1 740 705 6.27      
9 A2 3243 3090 0.00      
10 A2 1184 1128 0.00      
11 A2 962 917 0.00      
12 A2 619 590 0.00      
13 B1 3255 3101 18.21      
14 B1 1112 1060 3.30      
15 B1 787 750 55.56      
16 B1 751 716 0.69      
17 B1 266 253 4.05      
18 B2 3269 3114 12.29      
19 B2 3147 2998 15.91      
20 B2 1474 1405 0.82      
21 B2 1138 1084 6.69      
22 B2 1078 1027 5.54      
23 B2 912 869 14.35      
24 B2 334 318 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 18739.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 17855.1 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/CEP-121G*
ABC
0.64075 0.22503 0.17855

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.656
C2 0.000 0.000 0.318
H3 0.000 0.933 2.215
H4 0.000 -0.933 2.215
C5 0.000 0.779 -0.941
C6 0.000 -0.779 -0.941
H7 0.919 1.277 -1.245
H8 -0.919 1.277 -1.245
H9 -0.919 -1.277 -1.245
H10 0.919 -1.277 -1.245

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.33781.08761.08762.71142.71143.29993.29993.29993.2999
C21.33782.11412.11411.48091.48092.21772.21772.21772.2177
H31.08762.11411.86533.16023.59093.59673.59674.20724.2072
H41.08762.11411.86533.59093.16024.20724.20723.59673.5967
C52.71141.48093.16023.59091.55871.08841.08842.27282.2728
C62.71141.48093.59093.16021.55872.27282.27281.08841.0884
H73.29992.21773.59674.20721.08842.27281.83803.14672.5541
H83.29992.21773.59674.20721.08842.27281.83802.55413.1467
H93.29992.21774.20723.59672.27281.08843.14672.55411.8380
H103.29992.21774.20723.59672.27281.08842.55413.14671.8380

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.246 C1 C2 C6 148.246
C2 C1 H3 120.958 C2 C1 H4 120.958
C2 C5 C6 58.246 C2 C5 H7 118.551
C2 C5 H8 118.551 C2 C6 C5 58.246
C2 C6 H9 118.551 C2 C6 H10 118.551
H3 C1 H4 118.083 C5 C2 C6 63.507
C5 C6 H9 117.214 C5 C6 H10 117.214
C6 C5 H7 117.214 C6 C5 H8 117.214
H7 C5 H8 115.214 H9 C6 H10 115.214
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability