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

using model chemistry: B1B95/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at B1B95/TZVP
 hartrees
Energy at 0K-928.743871
Energy at 298.15K 
HF Energy-928.743871
Nuclear repulsion energy290.615568
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 B1B95/TZVP
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' 2237 2140 0.00 746.61 0.00 0.01
2 A' 2226 2130 0.00 95.81 0.62 0.77
3 A' 1010 966 0.00 12.29 0.75 0.86
4 A' 954 913 0.00 9.06 0.74 0.85
5 A' 644 616 0.00 1.40 0.17 0.30
6 A' 487 466 0.00 13.68 0.07 0.14
7 A" 2228 2132 396.01 0.00 0.75 0.86
8 A" 940 900 172.73 0.00 0.75 0.86
9 A" 734 702 118.67 0.00 0.75 0.86
10 A" 162 155 0.68 0.00 0.75 0.86
11 A" 80 76 0.07 0.00 0.75 0.86
12 E' 2236 2139 234.33 73.96 0.75 0.86
12 E' 2236 2139 234.39 73.93 0.75 0.86
13 E' 2222 2126 71.75 0.80 0.75 0.86
13 E' 2222 2126 71.78 0.80 0.75 0.86
14 E' 1014 970 142.85 2.11 0.75 0.86
14 E' 1013 970 142.86 2.11 0.75 0.86
15 E' 966 925 196.18 8.64 0.75 0.86
15 E' 966 925 196.21 8.63 0.75 0.86
16 E' 932 892 538.06 20.56 0.75 0.86
16 E' 932 892 538.07 20.55 0.75 0.86
17 E' 682 653 0.77 13.46 0.75 0.86
17 E' 682 653 0.77 13.45 0.75 0.86
18 E' 156 150 0.65 0.21 0.75 0.86
18 E' 156 150 0.65 0.21 0.75 0.86
19 E" 2225 2129 0.00 133.52 0.75 0.86
19 E" 2225 2129 0.00 133.58 0.75 0.86
20 E" 937 897 0.00 26.46 0.75 0.86
20 E" 937 897 0.00 26.43 0.75 0.86
21 E" 683 653 0.00 15.69 0.75 0.86
21 E" 683 653 0.00 15.68 0.75 0.86
22 E" 78 75 0.00 0.51 0.75 0.86
22 E" 78 75 0.00 0.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 17981.8 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 17206.8 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 B1B95/TZVP
ABC
0.10228 0.10228 0.05402

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/TZVP

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.749 0.000
Si3 -1.515 -0.875 0.000
Si4 1.515 -0.875 0.000
H5 -1.422 2.187 0.000
H6 -1.183 -2.324 0.000
H7 2.605 0.138 0.000
H8 0.680 2.295 1.205
H9 0.680 2.295 -1.205
H10 -2.328 -0.558 1.205
H11 -2.328 -0.558 -1.205
H12 1.647 -1.737 1.205
H13 1.647 -1.737 -1.205

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.74941.74941.74942.60822.60822.60822.67962.67962.67962.67962.67962.6796
Si21.74943.03013.03011.48734.24223.06281.48721.48723.49193.49194.03954.0395
Si31.74943.03013.03013.06281.48734.24224.03954.03951.48721.48723.49193.4919
Si41.74943.03013.03014.24223.06281.48733.49193.49194.03954.03951.48721.4872
H52.60821.48733.06284.24224.51754.51752.42522.42523.13143.13145.12465.1246
H62.60824.24221.48733.06284.51754.51755.12465.12462.42522.42523.13143.1314
H72.60823.06284.24221.48734.51754.51753.13143.13145.12465.12462.42522.4252
H82.67961.48724.03953.49192.42525.12463.13142.40934.14584.79504.14584.7950
H92.67961.48724.03953.49192.42525.12463.13142.40934.79504.14584.79504.1458
H102.67963.49191.48724.03953.13142.42525.12464.14584.79502.40934.14584.7950
H112.67963.49191.48724.03953.13142.42525.12464.79504.14582.40934.79504.1458
H122.67964.03953.49191.48725.12463.13142.42524.14584.79504.14584.79502.4093
H132.67964.03953.49191.48725.12463.13142.42524.79504.14584.79504.14582.4093

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.096 N1 Si2 H8 111.512
N1 Si2 H9 111.512 N1 Si3 H6 107.096
N1 Si3 H10 111.512 N1 Si3 H11 111.512
N1 Si4 H7 107.096 N1 Si4 H12 111.512
N1 Si4 H13 111.512 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 109.241 H5 Si2 H9 109.241
H6 Si3 H10 109.241 H6 Si3 H11 109.241
H7 Si4 H12 109.242 H7 Si4 H13 109.242
H8 Si2 H9 108.200 H10 Si3 H11 108.200
H12 Si4 H13 108.200
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.587      
2 Si 0.449      
3 Si 0.449      
4 Si 0.449      
5 H -0.090      
6 H -0.090      
7 H -0.090      
8 H -0.082      
9 H -0.082      
10 H -0.082      
11 H -0.082      
12 H -0.082      
13 H -0.082      


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 -51.101 0.000 0.000
y 0.000 -51.101 0.000
z 0.000 0.000 -52.412
Traceless
 xyz
x 0.655 0.000 0.000
y 0.000 0.655 0.000
z 0.000 0.000 -1.310
Polar
3z2-r2-2.621
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 12.512 -0.001 0.000
y -0.001 12.512 0.000
z 0.000 0.000 10.729


<r2> (average value of r2) Å2
<r2> 224.223
(<r2>)1/2 14.974