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All results from a given calculation for SiH2 (silicon dihydride)

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-290.580318
Energy at 298.15K-290.580942
Nuclear repulsion energy9.930286
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 B3PW91/6-311G*
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 2039 1963 267.01      
2 A1 1030 992 92.31      
3 B2 2038 1962 302.78      

Unscaled Zero Point Vibrational Energy (zpe) 2553.7 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 2458.5 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 B3PW91/6-311G*
ABC
7.84761 6.99036 3.69711

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.134
H2 0.000 1.094 -0.935
H3 0.000 -1.094 -0.935

Atom - Atom Distances (Å)
  Si1 H2 H3
Si11.52941.5294
H21.52942.1876
H31.52942.1876

picture of silicon dihydride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 H3 91.321
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.176      
2 H -0.088      
3 H -0.088      


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 -0.242 0.242
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.054 0.000 0.000
y 0.000 -16.193 0.000
z 0.000 0.000 -18.264
Traceless
 xyz
x 5.174 0.000 0.000
y 0.000 -1.034 0.000
z 0.000 0.000 -4.141
Polar
3z2-r2-8.281
x2-y24.139
xy0.000
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 14.076
(<r2>)1/2 3.752

State 2 (3B1)

Jump to S1C1
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-290.555268
Energy at 298.15K-290.555862
HF Energy-290.555268
Nuclear repulsion energy10.161034
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 B3PW91/6-311G*
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 2168 2088 13.69      
2 A1 884 851 74.95      
3 B2 2233 2150 84.94      

Unscaled Zero Point Vibrational Energy (zpe) 2643.1 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 2544.5 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 B3PW91/6-311G*
ABC
15.44241 5.11488 3.84224

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.095
H2 0.000 1.279 -0.667
H3 0.000 -1.279 -0.667

Atom - Atom Distances (Å)
  Si1 H2 H3
Si11.48851.4885
H21.48852.5574
H31.48852.5574

picture of silicon dihydride state 2 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.032      
2 H -0.016      
3 H -0.016      


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 0.145 0.145
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.461 0.000 0.000
y 0.000 -14.888 0.000
z 0.000 0.000 -14.827
Traceless
 xyz
x -1.603 0.000 0.000
y 0.000 0.756 0.000
z 0.000 0.000 0.847
Polar
3z2-r21.695
x2-y2-1.573
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.480 0.000 0.000
y 0.000 4.339 0.000
z 0.000 0.000 2.767


<r2> (average value of r2) Å2
<r2> 13.900
(<r2>)1/2 3.728