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 SiH2Cl2 (dichlorosilane)

using model chemistry: PBEPBEultrafine/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-1210.663763
Energy at 298.15K-1210.666266
HF Energy-1210.663763
Nuclear repulsion energy187.547435
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 PBEPBEultrafine/aug-cc-pVDZ
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 2187 2174 51.19      
2 A1 890 884 84.37      
3 A1 495 492 36.09      
4 A1 171 170 2.32      
5 A2 665 661 0.00      
6 B1 2212 2199 62.72      
7 B1 559 555 22.62      
8 B2 812 807 185.38      
9 B2 553 549 123.86      

Unscaled Zero Point Vibrational Energy (zpe) 4271.6 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 4245.5 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 PBEPBEultrafine/aug-cc-pVDZ
ABC
0.45034 0.08094 0.07043

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.783
H2 -1.255 0.000 1.598
H3 1.255 0.000 1.598
Cl4 0.000 1.712 -0.416
Cl5 0.000 -1.712 -0.416

Atom - Atom Distances (Å)
  Si1 H2 H3 Cl4 Cl5
Si11.49671.49672.09062.0906
H21.49672.51102.92652.9265
H31.49672.51102.92652.9265
Cl42.09062.92652.92653.4248
Cl52.09062.92652.92653.4248

picture of dichlorosilane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Si1 H3 114.040 H2 Si1 Cl4 108.195
H2 Si1 Cl5 108.195 H3 Si1 Cl4 108.195
H3 Si1 Cl5 108.195 Cl4 Si1 Cl5 109.991
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.045      
2 H 0.293      
3 H 0.293      
4 Cl -0.316      
5 Cl -0.316      


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 1.422 1.422
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.485 0.000 0.000
y 0.000 -41.780 0.000
z 0.000 0.000 -38.052
Traceless
 xyz
x 0.431 0.000 0.000
y 0.000 -3.012 0.000
z 0.000 0.000 2.580
Polar
3z2-r25.161
x2-y22.295
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.110 0.000 0.000
y 0.000 10.064 0.000
z 0.000 0.000 8.090


<r2> (average value of r2) Å2
<r2> 147.273
(<r2>)1/2 12.136