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All results from a given calculation for CH2SiH2 (silaethylene)

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-327.967515
Energy at 298.15K-327.970681
HF Energy-327.967515
Nuclear repulsion energy50.364284
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 PBEPBE/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 3096 3068 0.05      
2 A1 2170 2150 30.68      
3 A1 1402 1389 6.11      
4 A1 954 945 8.04      
5 A1 867 859 39.48      
6 A2 728 721 0.00      
7 B1 789 781 69.02      
8 B1 389 385 11.74      
9 B2 3193 3164 0.27      
10 B2 2200 2180 102.31      
11 B2 847 839 69.12      
12 B2 464 460 7.47      

Unscaled Zero Point Vibrational Energy (zpe) 8548.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 8470.9 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 PBEPBE/3-21G
ABC
3.37233 0.47236 0.41433

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.183
Si2 0.000 0.000 0.564
H3 0.000 0.929 -1.762
H4 0.000 -0.929 -1.762
H5 0.000 1.271 1.362
H6 0.000 -1.271 1.362

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6
C11.74741.09451.09452.84542.8454
Si21.74742.50452.50451.50121.5012
H31.09452.50451.85843.14263.8212
H41.09452.50451.85843.82123.1426
H52.84541.50123.14263.82122.5429
H62.84541.50123.82123.14262.5429

picture of silaethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 Si2 H5 122.116 C1 Si2 H6 122.116
Si2 C1 H3 121.898 Si2 C1 H4 121.898
H3 C1 H4 116.204 H5 Si2 H6 115.767
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.798      
2 Si 0.494      
3 H 0.223      
4 H 0.223      
5 H -0.071      
6 H -0.071      


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 0.135 0.135
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.089 0.000 0.000
y 0.000 -20.665 0.000
z 0.000 0.000 -20.084
Traceless
 xyz
x -2.714 0.000 0.000
y 0.000 0.921 0.000
z 0.000 0.000 1.793
Polar
3z2-r23.585
x2-y2-2.424
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.123 0.000 0.000
y 0.000 4.377 0.000
z 0.000 0.000 7.427


<r2> (average value of r2) Å2
<r2> 41.026
(<r2>)1/2 6.405