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

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-31G*
 hartrees
Energy at 0K-928.693043
Energy at 298.15K 
HF Energy-928.693043
Nuclear repulsion energy289.933183
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 B3LYPultrafine/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' 2255 2160 0.00 544.46 0.00 0.00
2 A' 2243 2149 0.00 97.16 0.50 0.67
3 A' 1042 998 0.00 15.81 0.75 0.86
4 A' 970 929 0.00 15.29 0.75 0.86
5 A' 660 632 0.00 1.23 0.04 0.07
6 A' 481 461 0.00 15.17 0.08 0.15
7 A" 2243 2149 517.67 0.00 0.75 0.86
8 A" 953 913 208.08 0.00 0.75 0.86
9 A" 741 710 116.09 0.00 0.75 0.86
10 A" 180 172 1.11 0.00 0.75 0.86
11 A" 75 72 0.02 0.00 0.75 0.86
12 E' 2255 2161 288.30 60.42 0.75 0.86
12 E' 2255 2161 288.33 60.42 0.75 0.86
13 E' 2237 2143 97.61 4.90 0.75 0.86
13 E' 2237 2143 97.61 4.90 0.75 0.86
14 E' 1007 964 43.00 5.47 0.75 0.86
14 E' 1007 964 43.00 5.47 0.75 0.86
15 E' 980 939 306.74 4.35 0.75 0.86
15 E' 980 939 306.74 4.35 0.75 0.86
16 E' 955 915 582.68 27.20 0.75 0.86
16 E' 955 915 582.74 27.20 0.75 0.86
17 E' 691 662 3.17 13.75 0.75 0.86
17 E' 691 662 3.17 13.75 0.75 0.86
18 E' 180 173 0.47 0.14 0.75 0.86
18 E' 180 173 0.47 0.14 0.75 0.86
19 E" 2239 2145 0.00 101.86 0.75 0.86
19 E" 2239 2145 0.00 101.87 0.75 0.86
20 E" 948 908 0.00 25.18 0.75 0.86
20 E" 948 908 0.00 25.18 0.75 0.86
21 E" 691 662 0.00 13.84 0.75 0.86
21 E" 691 662 0.00 13.84 0.75 0.86
22 E" 73 70 0.00 0.68 0.75 0.86
22 E" 73 70 0.00 0.68 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18177.4 cm-1
Scaled (by 0.958) Zero Point Vibrational Energy (zpe) 17414.0 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 B3LYPultrafine/6-31G*
ABC
0.10176 0.10176 0.05371

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/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 -1.418 2.204 0.000
H6 -1.200 -2.330 0.000
H7 2.617 0.126 0.000
H8 0.680 2.308 1.202
H9 0.680 2.308 -1.202
H10 -2.339 -0.565 1.202
H11 -2.339 -0.565 -1.202
H12 1.659 -1.743 1.202
H13 1.659 -1.743 -1.202

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.75351.75351.75352.62042.62042.62042.68972.68972.68972.68972.68972.6897
Si21.75353.03723.03721.48754.25583.08221.48821.48823.50593.50594.05254.0525
Si31.75353.03723.03723.08221.48754.25584.05254.05251.48821.48823.50593.5059
Si41.75353.03723.03724.25583.08221.48753.50593.50594.05254.05251.48821.4882
H52.62041.48753.08224.25584.53874.53872.42002.42003.15603.15605.14665.1466
H62.62044.25581.48753.08224.53874.53875.14665.14662.42002.42003.15603.1560
H72.62043.08224.25581.48754.53874.53873.15603.15605.14665.14662.42002.4200
H82.68971.48824.05253.50592.42005.14663.15602.40394.16774.81134.16774.8113
H92.68971.48824.05253.50592.42005.14663.15602.40394.81134.16774.81134.1677
H102.68973.50591.48824.05253.15602.42005.14664.16774.81132.40394.16774.8113
H112.68973.50591.48824.05253.15602.42005.14664.81134.16772.40394.81134.1677
H122.68974.05253.50591.48825.14663.15602.42004.16774.81134.16774.81132.4039
H132.68974.05253.50591.48825.14663.15602.42004.81134.16774.81134.16772.4039

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.622 N1 Si2 H8 111.878
N1 Si2 H9 111.878 N1 Si3 H6 107.622
N1 Si3 H10 111.878 N1 Si3 H11 111.878
N1 Si4 H7 107.622 N1 Si4 H12 111.878
N1 Si4 H13 111.878 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.830 H5 Si2 H9 108.830
H6 Si3 H10 108.830 H6 Si3 H11 108.830
H7 Si4 H12 108.830 H7 Si4 H13 108.830
H8 Si2 H9 107.732 H10 Si3 H11 107.732
H12 Si4 H13 107.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.816      
2 Si 0.507      
3 Si 0.507      
4 Si 0.507      
5 H -0.084      
6 H -0.084      
7 H -0.084      
8 H -0.076      
9 H -0.076      
10 H -0.076      
11 H -0.076      
12 H -0.076      
13 H -0.076      


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 -50.800 0.000 0.000
y 0.000 -50.800 0.000
z 0.000 0.000 -52.064
Traceless
 xyz
x 0.632 0.000 0.000
y 0.000 0.632 0.000
z 0.000 0.000 -1.264
Polar
3z2-r2-2.527
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 11.041 0.000 0.000
y 0.000 11.041 0.000
z 0.000 0.000 8.991


<r2> (average value of r2) Å2
<r2> 225.144
(<r2>)1/2 15.005