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

using model chemistry: PBEPBE/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 PBEPBE/6-31G
 hartrees
Energy at 0K-927.955018
Energy at 298.15K 
HF Energy-927.955018
Nuclear repulsion energy282.583936
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 PBEPBE/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' 2118 2089 0.00 172.97 0.19 0.31
2 A' 2099 2070 0.00 619.37 0.01 0.03
3 A' 953 940 0.00 33.47 0.74 0.85
4 A' 900 888 0.00 13.85 0.74 0.85
5 A' 602 594 0.00 1.03 0.00 0.00
6 A' 444 438 0.00 24.28 0.09 0.17
7 A" 2100 2071 510.26 0.00 0.75 0.86
8 A" 880 868 137.15 0.00 0.75 0.86
9 A" 676 667 115.71 0.00 0.75 0.86
10 A" 206 203 3.36 0.00 0.75 0.86
11 A" 74i 73i 0.05 0.00 0.75 0.86
12 E' 2127 2098 222.17 79.69 0.75 0.86
12 E' 2127 2098 222.20 79.70 0.75 0.86
13 E' 2082 2053 169.57 13.64 0.75 0.86
13 E' 2082 2053 169.58 13.64 0.75 0.86
14 E' 942 929 34.41 3.43 0.75 0.86
14 E' 942 929 34.41 3.43 0.75 0.86
15 E' 911 898 225.38 19.36 0.75 0.86
15 E' 911 898 225.38 19.36 0.75 0.86
16 E' 876 863 458.41 41.46 0.75 0.86
16 E' 876 863 458.44 41.44 0.75 0.86
17 E' 640 631 2.60 16.20 0.75 0.86
17 E' 640 631 2.60 16.20 0.75 0.86
18 E' 183 181 0.17 0.23 0.75 0.86
18 E' 183 181 0.17 0.23 0.75 0.86
19 E" 2095 2066 0.00 137.86 0.75 0.86
19 E" 2095 2066 0.00 137.86 0.75 0.86
20 E" 877 865 0.00 39.27 0.75 0.86
20 E" 877 865 0.00 39.26 0.75 0.86
21 E" 631 622 0.00 19.44 0.75 0.86
21 E" 631 622 0.00 19.44 0.75 0.86
22 E" 40 39 0.00 1.19 0.75 0.86
22 E" 40 39 0.00 1.19 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16854.4 cm-1
Scaled (by 0.9862) Zero Point Vibrational Energy (zpe) 16621.8 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 PBEPBE/6-31G
ABC
0.09651 0.09651 0.05090

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/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 1.802 0.000
Si3 -1.561 -0.901 0.000
Si4 1.561 -0.901 0.000
H5 -1.445 2.256 0.000
H6 -1.231 -2.380 0.000
H7 2.677 0.124 0.000
H8 0.695 2.371 1.225
H9 0.695 2.371 -1.225
H10 -2.401 -0.584 1.225
H11 -2.401 -0.584 -1.225
H12 1.706 -1.787 1.225
H13 1.706 -1.787 -1.225

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.80211.80211.80212.67962.67962.67962.75752.75752.75752.75752.75752.7575
Si21.80213.12133.12131.51504.35953.15951.51851.51853.59943.59944.15854.1585
Si31.80213.12133.12133.15951.51504.35954.15854.15851.51851.51853.59943.5994
Si41.80213.12133.12134.35953.15951.51503.59943.59944.15854.15851.51851.5185
H52.67961.51503.15954.35954.64124.64122.46842.46843.23703.23705.27075.2707
H62.67964.35951.51503.15954.64124.64125.27075.27072.46842.46843.23703.2370
H72.67963.15954.35951.51504.64124.64123.23703.23705.27075.27072.46842.4684
H82.75751.51854.15853.59942.46845.27073.23702.44924.27934.93064.27934.9306
H92.75751.51854.15853.59942.46845.27073.23702.44924.93064.27934.93064.2793
H102.75753.59941.51854.15853.23702.46845.27074.27934.93062.44924.27934.9306
H112.75753.59941.51854.15853.23702.46845.27074.93064.27932.44924.93064.2793
H122.75754.15853.59941.51855.27073.23702.46844.27934.93064.27934.93062.4492
H132.75754.15853.59941.51855.27073.23702.46844.93064.27934.93064.27932.4492

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.446 N1 Si2 H8 111.999
N1 Si2 H9 111.999 N1 Si3 H6 107.446
N1 Si3 H10 111.999 N1 Si3 H11 111.999
N1 Si4 H7 107.446 N1 Si4 H12 111.999
N1 Si4 H13 111.999 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.917 H5 Si2 H9 108.917
H6 Si3 H10 108.917 H6 Si3 H11 108.917
H7 Si4 H12 108.917 H7 Si4 H13 108.917
H8 Si2 H9 107.496 H10 Si3 H11 107.496
H12 Si4 H13 107.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -1.129      
2 Si 0.634      
3 Si 0.634      
4 Si 0.634      
5 H -0.091      
6 H -0.091      
7 H -0.091      
8 H -0.083      
9 H -0.083      
10 H -0.083      
11 H -0.083      
12 H -0.083      
13 H -0.083      


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 -50.909 0.000 0.000
y 0.000 -50.909 0.000
z 0.000 0.000 -53.591
Traceless
 xyz
x 1.341 0.000 0.000
y 0.000 1.341 0.000
z 0.000 0.000 -2.682
Polar
3z2-r2-5.364
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 12.251 -0.000 0.000
y -0.000 12.251 0.000
z 0.000 0.000 9.729


<r2> (average value of r2) Å2
<r2> 235.918
(<r2>)1/2 15.360