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: LSDA/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/3-21G
 hartrees
Energy at 0K-154.215184
Energy at 298.15K-154.220947
Nuclear repulsion energy109.132254
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 LSDA/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 A1 3080 3030 1.21      
2 A1 3077 3027 6.62      
3 A1 1848 1817 5.90      
4 A1 1463 1439 0.01      
5 A1 1435 1412 5.05      
6 A1 1046 1028 7.99      
7 A1 1023 1006 16.87      
8 A1 732 720 4.11      
9 A2 3155 3104 0.00      
10 A2 1143 1124 0.00      
11 A2 950 934 0.00      
12 A2 620 609 0.00      
13 B1 3170 3118 3.38      
14 B1 1092 1075 0.62      
15 B1 910 895 56.18      
16 B1 756 744 3.81      
17 B1 317 312 5.95      
18 B2 3160 3108 6.02      
19 B2 3077 3027 2.87      
20 B2 1431 1408 7.35      
21 B2 1145 1126 16.75      
22 B2 1067 1049 8.45      
23 B2 893 878 8.98      
24 B2 363 357 1.16      

Unscaled Zero Point Vibrational Energy (zpe) 18476.5 cm-1
Scaled (by 0.9836) Zero Point Vibrational Energy (zpe) 18173.5 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 LSDA/3-21G
ABC
0.64569 0.22984 0.18208

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.632
C2 0.000 0.000 0.318
H3 0.000 0.934 2.204
H4 0.000 -0.934 2.204
C5 0.000 0.773 -0.931
C6 0.000 -0.773 -0.931
H7 0.923 1.278 -1.235
H8 -0.923 1.278 -1.235
H9 -0.923 -1.278 -1.235
H10 0.923 -1.278 -1.235

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31411.09571.09572.67702.67703.27143.27143.27143.2714
C21.31412.10522.10521.46871.46872.21242.21242.21242.2124
H31.09572.10521.86873.13953.57003.57733.57734.19184.1918
H41.09572.10521.86873.57003.13954.19184.19183.57733.5773
C52.67701.46873.13953.57001.54561.09501.09502.26902.2690
C62.67701.46873.57003.13951.54562.26902.26901.09501.0950
H73.27142.21243.57734.19181.09502.26901.84613.15222.5551
H83.27142.21243.57734.19181.09502.26901.84612.55513.1522
H93.27142.21244.19183.57732.26901.09503.15222.55511.8461
H103.27142.21244.19183.57732.26901.09502.55513.15221.8461

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.251 C1 C2 C6 148.251
C2 C1 H3 121.491 C2 C1 H4 121.491
C2 C5 C6 58.251 C2 C5 H7 118.580
C2 C5 H8 118.580 C2 C6 C5 58.251
C2 C6 H9 118.580 C2 C6 H10 118.580
H3 C1 H4 117.018 C5 C2 C6 63.498
C5 C6 H9 117.448 C5 C6 H10 117.448
C6 C5 H7 117.448 C6 C5 H8 117.448
H7 C5 H8 114.912 H9 C6 H10 114.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.566      
2 C 0.004      
3 H 0.205      
4 H 0.205      
5 C -0.402      
6 C -0.402      
7 H 0.239      
8 H 0.239      
9 H 0.239      
10 H 0.239      


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 -0.394 0.394
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.196 0.000 0.000
y 0.000 -23.876 0.000
z 0.000 0.000 -24.078
Traceless
 xyz
x -1.219 0.000 0.000
y 0.000 0.761 0.000
z 0.000 0.000 0.458
Polar
3z2-r20.916
x2-y2-1.319
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.605 0.000 0.000
y 0.000 5.533 0.000
z 0.000 0.000 7.734


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000