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: B1B95/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G
 hartrees
Energy at 0K-155.840675
Energy at 298.15K-155.846524
Nuclear repulsion energy109.140826
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 B1B95/6-31G
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 3174 3027 13.12      
2 A1 3163 3016 10.21      
3 A1 1889 1802 5.13      
4 A1 1520 1450 0.04      
5 A1 1487 1419 1.52      
6 A1 1095 1044 1.35      
7 A1 1087 1037 12.17      
8 A1 760 725 6.29      
9 A2 3238 3088 0.00      
10 A2 1190 1135 0.00      
11 A2 984 938 0.00      
12 A2 639 610 0.00      
13 B1 3252 3101 20.88      
14 B1 1123 1071 0.00      
15 B1 962 917 50.94      
16 B1 783 747 2.43      
17 B1 310 295 4.52      
18 B2 3262 3111 17.71      
19 B2 3159 3012 12.44      
20 B2 1492 1423 2.65      
21 B2 1177 1123 14.42      
22 B2 1134 1081 4.36      
23 B2 922 879 12.15      
24 B2 366 349 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 19083.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 18200.0 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 B1B95/6-31G
ABC
0.65111 0.22819 0.18104

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.641
C2 0.000 0.000 0.320
H3 0.000 0.924 2.209
H4 0.000 -0.924 2.209
C5 0.000 0.770 -0.935
C6 0.000 -0.770 -0.935
H7 0.908 1.279 -1.242
H8 -0.908 1.279 -1.242
H9 -0.908 -1.279 -1.242
H10 0.908 -1.279 -1.242

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.32101.08501.08502.68822.68823.28173.28173.28173.2817
C21.32102.10352.10351.47221.47222.21352.21352.21352.2135
H31.08502.10351.84823.14793.57173.58623.58624.19394.1939
H41.08502.10351.84823.57173.14794.19394.19393.58623.5862
C52.68821.47223.14793.57171.54091.08541.08542.26282.2628
C62.68821.47223.57173.14791.54092.26282.26281.08541.0854
H73.28172.21353.58624.19391.08542.26281.81663.13782.5585
H83.28172.21353.58624.19391.08542.26281.81662.55853.1378
H93.28172.21354.19393.58622.26281.08543.13782.55851.8166
H103.28172.21354.19393.58622.26281.08542.55853.13781.8166

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.443 C1 C2 C6 148.443
C2 C1 H3 121.607 C2 C1 H4 121.607
C2 C5 C6 58.443 C2 C5 H7 119.096
C2 C5 H8 119.096 C2 C6 C5 58.443
C2 C6 H9 119.096 C2 C6 H10 119.096
H3 C1 H4 116.787 C5 C2 C6 63.113
C5 C6 H9 117.954 C5 C6 H10 117.954
C6 C5 H7 117.954 C6 C5 H8 117.954
H7 C5 H8 113.617 H9 C6 H10 113.617
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.400      
2 C 0.038      
3 H 0.145      
4 H 0.145      
5 C -0.323      
6 C -0.323      
7 H 0.179      
8 H 0.179      
9 H 0.179      
10 H 0.179      


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 -0.383 0.383
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.982 0.000 0.000
y 0.000 -23.878 0.000
z 0.000 0.000 -24.130
Traceless
 xyz
x -0.978 0.000 0.000
y 0.000 0.678 0.000
z 0.000 0.000 0.300
Polar
3z2-r20.600
x2-y2-1.104
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.808 0.000 0.000
y 0.000 5.701 0.000
z 0.000 0.000 8.055


<r2> (average value of r2) Å2
<r2> 77.053
(<r2>)1/2 8.778