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

using model chemistry: B3LYP/SDD

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/SDD
 hartrees
Energy at 0K-928.600746
Energy at 298.15K 
HF Energy-928.600746
Nuclear repulsion energy285.639201
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/SDD
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' 2187 2102 0.00 428.59 0.01 0.02
2 A' 2175 2091 0.00 243.75 0.12 0.22
3 A' 1010 971 0.00 32.63 0.74 0.85
4 A' 962 925 0.00 15.04 0.75 0.86
5 A' 644 619 0.00 1.15 0.02 0.04
6 A' 462 445 0.00 18.49 0.11 0.19
7 A" 2168 2084 404.62 0.00 0.75 0.86
8 A" 946 909 188.44 0.00 0.75 0.86
9 A" 752 723 161.70 0.00 0.75 0.86
10 A" 246 236 3.07 0.00 0.75 0.86
11 A" 58 56 0.22 0.00 0.75 0.86
12 E' 2190 2105 194.61 59.58 0.75 0.86
12 E' 2190 2105 194.64 59.57 0.75 0.86
13 E' 2165 2081 115.41 9.87 0.75 0.86
13 E' 2165 2081 115.41 9.87 0.75 0.86
14 E' 985 947 14.19 6.82 0.75 0.86
14 E' 985 947 14.20 6.82 0.75 0.86
15 E' 966 928 131.08 20.92 0.75 0.86
15 E' 966 928 131.08 20.91 0.75 0.86
16 E' 931 895 706.84 34.30 0.75 0.86
16 E' 931 895 706.88 34.30 0.75 0.86
17 E' 681 655 1.80 17.03 0.75 0.86
17 E' 681 655 1.80 17.03 0.75 0.86
18 E' 210 202 0.23 0.18 0.75 0.86
18 E' 210 202 0.23 0.18 0.75 0.86
19 E" 2164 2080 0.00 109.63 0.75 0.86
19 E" 2164 2080 0.00 109.64 0.75 0.86
20 E" 942 906 0.00 39.35 0.75 0.86
20 E" 942 906 0.00 39.35 0.75 0.86
21 E" 674 648 0.00 20.62 0.75 0.86
21 E" 674 648 0.00 20.62 0.75 0.86
22 E" 61 59 0.00 0.79 0.75 0.86
22 E" 61 59 0.00 0.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17773.4 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 17085.5 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/SDD
ABC
0.09852 0.09852 0.05194

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.785 0.000
Si3 -1.546 -0.892 0.000
Si4 1.546 -0.892 0.000
H5 -1.423 2.240 0.000
H6 -1.229 -2.352 0.000
H7 2.652 0.112 0.000
H8 0.688 2.338 1.208
H9 0.688 2.338 -1.208
H10 -2.369 -0.573 1.208
H11 -2.369 -0.573 -1.208
H12 1.681 -1.765 1.208
H13 1.681 -1.765 -1.208

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.78481.78481.78482.65392.65392.65392.72002.72002.72002.72002.72002.7200
Si21.78483.09143.09141.49404.31583.13501.49621.49623.55393.55394.10904.1090
Si31.78483.09143.09143.13501.49404.31584.10904.10901.49621.49623.55393.5539
Si41.78483.09143.09144.31583.13501.49403.55393.55394.10904.10901.49621.4962
H52.65391.49403.13504.31584.59674.59672.43412.43413.20453.20455.20885.2088
H62.65394.31581.49403.13504.59674.59675.20885.20882.43412.43413.20453.2045
H72.65393.13504.31581.49404.59674.59673.20453.20455.20885.20882.43412.4341
H82.72001.49624.10903.55392.43415.20883.20452.41634.22104.86374.22104.8637
H92.72001.49624.10903.55392.43415.20883.20452.41634.86374.22104.86374.2210
H102.72003.55391.49624.10903.20452.43415.20884.22104.86372.41634.22104.8637
H112.72003.55391.49624.10903.20452.43415.20884.86374.22102.41634.86374.2210
H122.72004.10903.55391.49625.20883.20452.43414.22104.86374.22104.86372.4163
H132.72004.10903.55391.49625.20883.20452.43414.86374.22104.86374.22102.4163

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.744 N1 Si2 H8 111.693
N1 Si2 H9 111.693 N1 Si3 H6 107.744
N1 Si3 H10 111.693 N1 Si3 H11 111.693
N1 Si4 H7 107.744 N1 Si4 H12 111.693
N1 Si4 H13 111.693 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.980 H5 Si2 H9 108.980
H6 Si3 H10 108.980 H6 Si3 H11 108.980
H7 Si4 H12 108.980 H7 Si4 H13 108.980
H8 Si2 H9 107.696 H10 Si3 H11 107.696
H12 Si4 H13 107.696
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -1.443      
2 Si 0.795      
3 Si 0.795      
4 Si 0.795      
5 H -0.111      
6 H -0.111      
7 H -0.111      
8 H -0.102      
9 H -0.102      
10 H -0.102      
11 H -0.102      
12 H -0.102      
13 H -0.102      


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 -51.429 0.000 0.000
y 0.000 -51.429 0.000
z 0.000 0.000 -54.056
Traceless
 xyz
x 1.314 0.000 0.000
y 0.000 1.314 0.000
z 0.000 0.000 -2.628
Polar
3z2-r2-5.256
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 11.098 0.000 0.000
y 0.000 11.098 0.000
z 0.000 0.000 9.109


<r2> (average value of r2) Å2
<r2> 231.985
(<r2>)1/2 15.231