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: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-155.015381
Energy at 298.15K-155.021242
Nuclear repulsion energy109.214995
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 B1B95/3-21G
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 3168 3030 2.23      
2 A1 3164 3027 13.56      
3 A1 1868 1787 3.30      
4 A1 1522 1456 0.04      
5 A1 1492 1428 1.70      
6 A1 1075 1028 15.99      
7 A1 1043 997 1.46      
8 A1 735 703 6.25      
9 A2 3244 3104 0.00      
10 A2 1183 1132 0.00      
11 A2 982 940 0.00      
12 A2 638 611 0.00      
13 B1 3259 3118 9.62      
14 B1 1132 1083 0.04      
15 B1 962 920 53.13      
16 B1 780 746 2.31      
17 B1 332 318 6.54      
18 B2 3245 3104 10.68      
19 B2 3164 3027 7.22      
20 B2 1487 1422 3.60      
21 B2 1178 1127 13.88      
22 B2 1113 1065 6.52      
23 B2 906 866 10.27      
24 B2 369 353 0.85      

Unscaled Zero Point Vibrational Energy (zpe) 19019.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18195.7 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 B1B95/3-21G
ABC
0.64701 0.22951 0.18177

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.634
C2 0.000 0.000 0.321
H3 0.000 0.925 2.200
H4 0.000 -0.925 2.200
C5 0.000 0.775 -0.933
C6 0.000 -0.775 -0.933
H7 0.916 1.272 -1.233
H8 -0.916 1.272 -1.233
H9 -0.916 -1.272 -1.233
H10 0.916 -1.272 -1.233

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.31281.08481.08482.68192.68193.26713.26713.26713.2671
C21.31282.09462.09461.47491.47492.20712.20712.20712.2071
H31.08482.09461.85053.13743.56553.56983.56984.17754.1775
H41.08482.09461.85053.56553.13744.17754.17753.56983.5698
C52.68191.47493.13743.56551.55051.08411.08412.26272.2627
C62.68191.47493.56553.13741.55052.26272.26271.08411.0841
H73.26712.20713.56984.17751.08412.26271.83203.13502.5440
H83.26712.20713.56984.17751.08412.26271.83202.54403.1350
H93.26712.20714.17753.56982.26271.08413.13502.54401.8320
H103.26712.20714.17753.56982.26271.08412.54403.13501.8320

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.289 C1 C2 C6 148.289
C2 C1 H3 121.472 C2 C1 H4 121.472
C2 C5 C6 58.289 C2 C5 H7 118.393
C2 C5 H8 118.393 C2 C6 C5 58.289
C2 C6 H9 118.393 C2 C6 H10 118.393
H3 C1 H4 117.057 C5 C2 C6 63.422
C5 C6 H9 117.272 C5 C6 H10 117.272
C6 C5 H7 117.272 C6 C5 H8 117.272
H7 C5 H8 115.333 H9 C6 H10 115.333
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.540      
2 C -0.045      
3 H 0.205      
4 H 0.205      
5 C -0.385      
6 C -0.385      
7 H 0.236      
8 H 0.236      
9 H 0.236      
10 H 0.236      


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 -0.333 0.333
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.248 0.000 0.000
y 0.000 -23.933 0.000
z 0.000 0.000 -23.991
Traceless
 xyz
x -1.286 0.000 0.000
y 0.000 0.687 0.000
z 0.000 0.000 0.599
Polar
3z2-r21.198
x2-y2-1.316
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.525 0.000 0.000
y 0.000 5.441 0.000
z 0.000 0.000 7.656


<r2> (average value of r2) Å2
<r2> 76.841
(<r2>)1/2 8.766