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All results from a given calculation for N(SiH3)3 (trisilylamine)

using model chemistry: B3LYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B3LYP/6-31G**
 hartrees
Energy at 0K-928.702681
Energy at 298.15K 
HF Energy-928.702681
Nuclear repulsion energy289.938999
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 B3LYP/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 A' 2244 2156 0.00 562.46 0.00 0.00
2 A' 2230 2143 0.00 85.06 0.61 0.76
3 A' 1042 1001 0.00 14.61 0.75 0.86
4 A' 972 934 0.00 14.58 0.75 0.86
5 A' 660 634 0.00 1.30 0.05 0.09
6 A' 481 462 0.00 15.22 0.08 0.15
7 A" 2230 2143 484.12 0.00 0.75 0.86
8 A" 955 918 199.47 0.00 0.75 0.86
9 A" 743 714 114.58 0.00 0.75 0.86
10 A" 179 172 1.18 0.00 0.75 0.86
11 A" 74 71 0.02 0.00 0.75 0.86
12 E' 2242 2154 279.05 59.22 0.75 0.86
12 E' 2242 2154 279.08 59.22 0.75 0.86
13 E' 2226 2139 84.16 4.98 0.75 0.86
13 E' 2226 2139 84.16 4.99 0.75 0.86
14 E' 1008 969 34.95 5.53 0.75 0.86
14 E' 1008 969 34.95 5.53 0.75 0.86
15 E' 982 943 273.23 5.32 0.75 0.86
15 E' 982 943 273.23 5.32 0.75 0.86
16 E' 955 918 604.41 24.38 0.75 0.86
16 E' 955 918 604.46 24.38 0.75 0.86
17 E' 691 664 3.37 13.14 0.75 0.86
17 E' 691 664 3.37 13.14 0.75 0.86
18 E' 179 172 0.45 0.13 0.75 0.86
18 E' 179 172 0.45 0.13 0.75 0.86
19 E" 2226 2139 0.00 100.94 0.75 0.86
19 E" 2226 2139 0.00 100.95 0.75 0.86
20 E" 950 913 0.00 24.41 0.75 0.86
20 E" 950 913 0.00 24.42 0.75 0.86
21 E" 692 665 0.00 13.16 0.75 0.86
21 E" 692 665 0.00 13.16 0.75 0.86
22 E" 73 70 0.00 0.65 0.75 0.86
22 E" 73 70 0.00 0.65 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18128.2 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 17417.5 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 B3LYP/6-31G**
ABC
0.10175 0.10175 0.05370

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.754 0.000
Si3 -1.519 -0.877 0.000
Si4 1.519 -0.877 0.000
H5 -1.417 2.203 0.000
H6 -1.199 -2.329 0.000
H7 2.616 0.126 0.000
H8 0.679 2.307 1.202
H9 0.679 2.307 -1.202
H10 -2.338 -0.565 1.202
H11 -2.338 -0.565 -1.202
H12 1.659 -1.742 1.202
H13 1.659 -1.742 -1.202

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.75391.75391.75392.61932.61932.61932.68872.68872.68872.68872.68872.6887
Si21.75393.03783.03781.48664.25513.08141.48721.48723.50543.50544.05174.0517
Si31.75393.03783.03783.08141.48664.25514.05174.05171.48721.48723.50543.5054
Si41.75393.03783.03784.25513.08141.48663.50543.50544.05174.05171.48721.4872
H52.61931.48663.08144.25514.53684.53682.41882.41883.15493.15495.14455.1445
H62.61934.25511.48663.08144.53684.53685.14455.14452.41882.41883.15493.1549
H72.61933.08144.25511.48664.53684.53683.15493.15495.14455.14452.41882.4188
H82.68871.48724.05173.50542.41885.14453.15492.40304.16624.80954.16624.8095
H92.68871.48724.05173.50542.41885.14453.15492.40304.80954.16624.80954.1662
H102.68873.50541.48724.05173.15492.41885.14454.16624.80952.40304.16624.8095
H112.68873.50541.48724.05173.15492.41885.14454.80954.16622.40304.80954.1662
H122.68874.05173.50541.48725.14453.15492.41884.16624.80954.16624.80952.4030
H132.68874.05173.50541.48725.14453.15492.41884.80954.16624.80954.16622.4030

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.575 N1 Si2 H8 111.850
N1 Si2 H9 111.850 N1 Si3 H6 107.575
N1 Si3 H10 111.850 N1 Si3 H11 111.850
N1 Si4 H7 107.575 N1 Si4 H12 111.850
N1 Si4 H13 111.850 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.856 H5 Si2 H9 108.856
H6 Si3 H10 108.856 H6 Si3 H11 108.856
H7 Si4 H12 108.856 H7 Si4 H13 108.856
H8 Si2 H9 107.786 H10 Si3 H11 107.786
H12 Si4 H13 107.786
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.824      
2 Si 0.587      
3 Si 0.587      
4 Si 0.587      
5 H -0.110      
6 H -0.110      
7 H -0.110      
8 H -0.101      
9 H -0.101      
10 H -0.101      
11 H -0.101      
12 H -0.101      
13 H -0.101      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.655 0.000 0.000
y 0.000 -50.655 0.000
z 0.000 0.000 -51.944
Traceless
 xyz
x 0.644 0.000 0.000
y 0.000 0.644 0.000
z 0.000 0.000 -1.289
Polar
3z2-r2-2.578
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 11.194 0.000 0.000
y 0.000 11.194 0.000
z 0.000 0.000 9.087


<r2> (average value of r2) Å2
<r2> 225.059
(<r2>)1/2 15.002