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: mPW1PW91/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-155.942113
Energy at 298.15K-155.947859
Nuclear repulsion energy109.241034
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3159 3028 11.63      
2 A1 3138 3007 12.17      
3 A1 1866 1788 10.20      
4 A1 1475 1414 0.27      
5 A1 1431 1372 1.26      
6 A1 1088 1043 2.91      
7 A1 1024 982 3.58      
8 A1 761 729 5.69      
9 A2 3219 3085 0.00      
10 A2 1159 1111 0.00      
11 A2 946 907 0.00      
12 A2 608 582 0.00      
13 B1 3231 3096 11.80      
14 B1 1084 1039 2.19      
15 B1 927 889 45.68      
16 B1 749 718 2.42      
17 B1 284 272 4.96      
18 B2 3253 3118 9.81      
19 B2 3136 3005 14.11      
20 B2 1435 1375 3.53      
21 B2 1144 1096 7.00      
22 B2 1055 1011 0.87      
23 B2 912 874 14.19      
24 B2 352 338 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 18719.5 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 17938.9 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 mPW1PW91/aug-cc-pVDZ
ABC
0.65201 0.22896 0.18184

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.639
C2 0.000 0.000 0.315
H3 0.000 0.932 2.204
H4 0.000 -0.932 2.204
C5 0.000 0.768 -0.933
C6 0.000 -0.768 -0.933
H7 0.917 1.275 -1.236
H8 -0.917 1.275 -1.236
H9 -0.917 -1.275 -1.236
H10 0.917 -1.275 -1.236

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.32331.09001.09002.68372.68373.27553.27553.27553.2755
C21.32332.10612.10611.46551.46552.20732.20732.20732.2073
H31.09002.10611.86393.14103.56793.57653.57654.18854.1885
H41.09002.10611.86393.56793.14104.18854.18853.57653.5765
C52.68371.46553.14103.56791.53651.09041.09042.25982.2598
C62.68371.46553.56793.14101.53652.25982.25981.09041.0904
H73.27552.20733.57654.18851.09042.25981.83343.14042.5497
H83.27552.20733.57654.18851.09042.25981.83342.54973.1404
H93.27552.20734.18853.57652.25981.09043.14042.54971.8334
H103.27552.20734.18853.57652.25981.09042.54973.14041.8334

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.385 C1 C2 C6 148.385
C2 C1 H3 121.243 C2 C1 H4 121.243
C2 C5 C6 58.385 C2 C5 H7 118.712
C2 C5 H8 118.712 C2 C6 C5 58.385
C2 C6 H9 118.712 C2 C6 H10 118.712
H3 C1 H4 117.513 C5 C2 C6 63.230
C5 C6 H9 117.684 C5 C6 H10 117.684
C6 C5 H7 117.684 C6 C5 H8 117.684
H7 C5 H8 114.430 H9 C6 H10 114.430
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.335      
2 C 0.273      
3 H -0.371      
4 H -0.371      
5 C 0.758      
6 C 0.758      
7 H -0.345      
8 H -0.345      
9 H -0.345      
10 H -0.345      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.467 0.467
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.529 0.000 0.000
y 0.000 -24.386 0.000
z 0.000 0.000 -24.690
Traceless
 xyz
x -0.991 0.000 0.000
y 0.000 0.724 0.000
z 0.000 0.000 0.267
Polar
3z2-r20.535
x2-y2-1.144
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.681 0.000 0.000
y 0.000 6.957 0.000
z 0.000 0.000 9.707


<r2> (average value of r2) Å2
<r2> 77.187
(<r2>)1/2 8.786