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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-928.184053
Energy at 298.15K 
HF Energy-928.184053
Nuclear repulsion energy290.729449
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 PBE1PBE/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' 2264 2152 0.00 587.12 0.00 0.00
2 A' 2254 2142 0.00 77.38 0.74 0.85
3 A' 1030 978 0.00 16.49 0.75 0.86
4 A' 960 913 0.00 14.58 0.75 0.86
5 A' 653 621 0.00 1.41 0.05 0.09
6 A' 490 465 0.00 13.83 0.08 0.15
7 A" 2255 2143 503.79 0.00 0.75 0.86
8 A" 943 896 194.42 0.00 0.75 0.86
9 A" 737 700 117.40 0.00 0.75 0.86
10 A" 166 158 1.21 0.00 0.75 0.86
11 A" 68 65 0.01 0.00 0.75 0.86
12 E' 2265 2152 283.14 62.20 0.75 0.86
12 E' 2265 2152 283.19 62.20 0.75 0.86
13 E' 2248 2136 93.43 2.37 0.75 0.86
13 E' 2248 2136 93.44 2.37 0.75 0.86
14 E' 1016 966 137.69 2.66 0.75 0.86
14 E' 1016 966 137.69 2.66 0.75 0.86
15 E' 973 925 295.50 5.17 0.75 0.86
15 E' 973 925 295.51 5.17 0.75 0.86
16 E' 946 899 477.10 29.31 0.75 0.86
16 E' 946 899 477.12 29.31 0.75 0.86
17 E' 691 656 1.41 13.79 0.75 0.86
17 E' 691 656 1.41 13.79 0.75 0.86
18 E' 168 159 0.50 0.17 0.75 0.86
18 E' 168 159 0.50 0.17 0.75 0.86
19 E" 2251 2139 0.00 101.91 0.75 0.86
19 E" 2251 2139 0.00 101.90 0.75 0.86
20 E" 938 891 0.00 26.24 0.75 0.86
20 E" 938 891 0.00 26.24 0.75 0.86
21 E" 687 653 0.00 13.64 0.75 0.86
21 E" 687 653 0.00 13.64 0.75 0.86
22 E" 72 69 0.00 0.74 0.75 0.86
22 E" 72 69 0.00 0.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18164.2 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 17261.4 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 PBE1PBE/6-31G*
ABC
0.10243 0.10243 0.05410

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/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 1.747 0.000
Si3 -1.513 -0.873 0.000
Si4 1.513 -0.873 0.000
H5 -1.422 2.193 0.000
H6 -1.189 -2.328 0.000
H7 2.610 0.134 0.000
H8 0.681 2.301 1.204
H9 0.681 2.301 -1.204
H10 -2.333 -0.561 1.204
H11 -2.333 -0.561 -1.204
H12 1.653 -1.740 1.204
H13 1.653 -1.740 -1.204

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.74691.74691.74692.61392.61392.61392.68492.68492.68492.68492.68492.6849
Si21.74693.02583.02581.49014.24473.06831.49021.49023.49593.49594.04234.0423
Si31.74693.02583.02583.06831.49014.24474.04234.04231.49021.49023.49593.4959
Si41.74693.02583.02584.24473.06831.49013.49593.49594.04234.04231.49021.4902
H52.61391.49013.06834.24474.52734.52732.42522.42523.14153.14155.13545.1354
H62.61394.24471.49013.06834.52734.52735.13545.13542.42522.42523.14153.1415
H72.61393.06834.24471.49014.52734.52733.14153.14155.13545.13542.42522.4252
H82.68491.49024.04233.49592.42525.13543.14152.40874.15634.80394.15634.8039
H92.68491.49024.04233.49592.42525.13543.14152.40874.80394.15634.80394.1563
H102.68493.49591.49024.04233.14152.42525.13544.15634.80392.40874.15634.8039
H112.68493.49591.49024.04233.14152.42525.13544.80394.15632.40874.80394.1563
H122.68494.04233.49591.49025.13543.14152.42524.15634.80394.15634.80392.4087
H132.68494.04233.49591.49025.13543.14152.42524.80394.15634.80394.15632.4087

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.437 N1 Si2 H8 111.831
N1 Si2 H9 111.831 N1 Si3 H6 107.437
N1 Si3 H10 111.831 N1 Si3 H11 111.831
N1 Si4 H7 107.437 N1 Si4 H12 111.831
N1 Si4 H13 111.831 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.923 H5 Si2 H9 108.923
H6 Si3 H10 108.923 H6 Si3 H11 108.923
H7 Si4 H12 108.923 H7 Si4 H13 108.923
H8 Si2 H9 107.832 H10 Si3 H11 107.832
H12 Si4 H13 107.832
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.843      
2 Si 0.495      
3 Si 0.495      
4 Si 0.495      
5 H -0.078      
6 H -0.078      
7 H -0.078      
8 H -0.068      
9 H -0.068      
10 H -0.068      
11 H -0.068      
12 H -0.068      
13 H -0.068      


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 -50.554 0.000 0.000
y 0.000 -50.554 0.000
z 0.000 0.000 -51.974
Traceless
 xyz
x 0.710 0.000 0.000
y 0.000 0.710 0.000
z 0.000 0.000 -1.420
Polar
3z2-r2-2.839
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 11.063 -0.000 0.000
y -0.000 11.063 0.000
z 0.000 0.000 9.086


<r2> (average value of r2) Å2
<r2> 223.796
(<r2>)1/2 14.960