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

using model chemistry: TPSSh/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at TPSSh/aug-cc-pVTZ
 hartrees
Energy at 0K-928.822996
Energy at 298.15K 
HF Energy-928.822996
Nuclear repulsion energy290.866172
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 TPSSh/aug-cc-pVTZ
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' 2243 2165 0.00 850.05 0.00 0.00
2 A' 2232 2154 0.00 73.47 0.67 0.81
3 A' 1021 985 0.00 1.97 0.71 0.83
4 A' 966 932 0.00 4.90 0.75 0.86
5 A' 645 623 0.00 0.67 0.20 0.33
6 A' 482 465 0.00 19.63 0.05 0.09
7 A" 2234 2156 364.26 0.00 0.75 0.86
8 A" 950 917 159.21 0.00 0.75 0.86
9 A" 734 708 99.78 0.00 0.75 0.86
10 A" 160 155 0.30 0.00 0.75 0.86
11 A" 86 83 0.24 0.00 0.75 0.86
12 E' 2242 2164 223.40 61.63 0.75 0.86
12 E' 2242 2164 223.51 61.32 0.75 0.86
13 E' 2229 2152 63.67 4.16 0.75 0.86
13 E' 2229 2152 63.63 4.14 0.75 0.86
14 E' 1004 969 60.22 2.37 0.75 0.86
14 E' 1004 969 60.17 2.37 0.75 0.86
15 E' 975 941 174.60 5.75 0.75 0.86
15 E' 975 941 174.68 5.77 0.75 0.86
16 E' 942 910 584.26 5.08 0.75 0.86
16 E' 942 910 584.61 5.10 0.75 0.86
17 E' 686 662 1.43 5.12 0.75 0.86
17 E' 686 662 1.43 5.12 0.75 0.86
18 E' 153 148 0.55 0.16 0.75 0.86
18 E' 153 148 0.55 0.16 0.75 0.86
19 E" 2231 2153 0.00 119.81 0.75 0.86
19 E" 2231 2153 0.00 119.24 0.75 0.86
20 E" 948 915 0.00 9.35 0.75 0.86
20 E" 948 915 0.00 9.30 0.75 0.86
21 E" 687 663 0.00 4.03 0.75 0.86
21 E" 687 663 0.00 4.05 0.75 0.86
22 E" 74 72 0.00 0.12 0.75 0.86
22 E" 74 72 0.00 0.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18047.9 cm-1
Scaled (by 0.9652) Zero Point Vibrational Energy (zpe) 17419.8 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 TPSSh/aug-cc-pVTZ
ABC
0.10244 0.10244 0.05410

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/aug-cc-pVTZ

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.748 0.000
Si3 -1.514 -0.874 0.000
Si4 1.514 -0.874 0.000
H5 -1.419 2.188 0.000
H6 -1.186 -2.323 0.000
H7 2.604 0.134 0.000
H8 0.682 2.292 1.202
H9 0.682 2.292 -1.202
H10 -2.325 -0.556 1.202
H11 -2.325 -0.556 -1.202
H12 1.644 -1.736 1.202
H13 1.644 -1.736 -1.202

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.74821.74821.74822.60792.60792.60792.67602.67602.67602.67602.67602.6760
Si21.74823.02793.02791.48534.24013.06401.48491.48493.48713.48714.03574.0357
Si31.74823.02793.02793.06401.48534.24014.03574.03571.48491.48493.48713.4871
Si41.74823.02793.02794.24013.06401.48533.48713.48714.03574.03571.48491.4849
H52.60791.48533.06404.24014.51714.51712.42202.42203.13003.13005.12105.1210
H62.60794.24011.48533.06404.51714.51715.12105.12102.42202.42203.13003.1300
H72.60793.06404.24011.48534.51714.51713.13003.13005.12105.12102.42202.4220
H82.67601.48494.03573.48712.42205.12103.13002.40434.14104.78844.14104.7884
H92.67601.48494.03573.48712.42205.12103.13002.40434.78844.14104.78844.1410
H102.67603.48711.48494.03573.13002.42205.12104.14104.78842.40434.14104.7884
H112.67603.48711.48494.03573.13002.42205.12104.78844.14102.40434.78844.1410
H122.67604.03573.48711.48495.12103.13002.42204.14104.78844.14104.78842.4043
H132.67604.03573.48711.48495.12103.13002.42204.78844.14104.78844.14102.4043

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.241 N1 Si2 H8 111.468
N1 Si2 H9 111.468 N1 Si3 H6 107.241
N1 Si3 H10 111.468 N1 Si3 H11 111.468
N1 Si4 H7 107.241 N1 Si4 H12 111.468
N1 Si4 H13 111.468 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 109.260 H5 Si2 H9 109.260
H6 Si3 H10 109.260 H6 Si3 H11 109.260
H7 Si4 H12 109.260 H7 Si4 H13 109.260
H8 Si2 H9 108.111 H10 Si3 H11 108.111
H12 Si4 H13 108.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.122      
2 Si 0.467      
3 Si 0.467      
4 Si 0.467      
5 H -0.176      
6 H -0.176      
7 H -0.176      
8 H -0.125      
9 H -0.125      
10 H -0.125      
11 H -0.125      
12 H -0.125      
13 H -0.125      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 13.938 -0.001 0.000
y -0.001 13.939 0.000
z 0.000 0.000 11.539


<r2> (average value of r2) Å2
<r2> 223.954
(<r2>)1/2 14.965