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

using model chemistry: B3LYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-917.906666
Energy at 298.15K 
HF Energy-917.906666
Nuclear repulsion energy292.026106
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/STO-3G
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' 2689 2400 0.00 39.29 0.57 0.73
2 A' 2624 2341 0.00 233.84 0.00 0.01
3 A' 1177 1050 0.00 39.65 0.70 0.82
4 A' 1130 1009 0.00 11.40 0.74 0.85
5 A' 737 657 0.00 0.06 0.63 0.77
6 A' 519 463 0.00 10.20 0.11 0.20
7 A" 2657 2371 132.34 0.00 0.75 0.86
8 A" 1111 992 197.87 0.00 0.75 0.86
9 A" 834 745 246.70 0.00 0.75 0.86
10 A" 199 178 3.18 0.00 0.75 0.86
11 A" 69i 61i 0.05 0.00 0.75 0.86
12 E' 2691 2402 41.21 44.25 0.75 0.86
12 E' 2691 2402 41.20 44.24 0.75 0.86
13 E' 2617 2335 61.07 3.90 0.75 0.86
13 E' 2617 2335 61.08 3.90 0.75 0.86
14 E' 1150 1027 76.25 13.17 0.75 0.86
14 E' 1150 1027 76.25 13.17 0.75 0.86
15 E' 1096 978 713.94 17.91 0.75 0.86
15 E' 1096 978 713.93 17.91 0.75 0.86
16 E' 1090 973 7.91 7.91 0.75 0.86
16 E' 1090 973 7.91 7.91 0.75 0.86
17 E' 774 690 5.81 8.52 0.75 0.86
17 E' 774 690 5.81 8.52 0.75 0.86
18 E' 219 196 0.69 0.34 0.75 0.86
18 E' 219 196 0.69 0.34 0.75 0.86
19 E" 2655 2369 0.00 76.11 0.75 0.86
19 E" 2655 2369 0.00 76.11 0.75 0.86
20 E" 1109 990 0.00 27.78 0.75 0.86
20 E" 1109 990 0.00 27.78 0.75 0.86
21 E" 771 688 0.00 8.19 0.75 0.86
21 E" 771 688 0.00 8.19 0.75 0.86
22 E" 49 43 0.00 0.14 0.75 0.86
22 E" 49 43 0.00 0.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21024.6 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 18762.4 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/STO-3G
ABC
0.10272 0.10272 0.05406

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.750 0.000
Si3 -1.515 -0.875 0.000
Si4 1.515 -0.875 0.000
H5 -1.367 2.218 0.000
H6 -1.237 -2.293 0.000
H7 2.605 0.075 0.000
H8 0.676 2.285 1.165
H9 0.676 2.285 -1.165
H10 -2.317 -0.557 1.165
H11 -2.317 -0.557 -1.165
H12 1.641 -1.728 1.165
H13 1.641 -1.728 -1.165

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.74971.74971.74972.60572.60572.60572.65252.65252.65252.65252.65252.6525
Si21.74973.03063.03061.44544.22813.09651.44971.44973.47073.47074.01804.0180
Si31.74973.03063.03063.09651.44544.22814.01804.01801.44971.44973.47073.4707
Si41.74973.03063.03064.22813.09651.44543.47073.47074.01804.01801.44971.4497
H52.60571.44543.09654.22814.51334.51332.35342.35343.15593.15595.09685.0968
H62.60574.22811.44543.09654.51334.51335.09685.09682.35342.35343.15593.1559
H72.60573.09654.22811.44544.51334.51333.15593.15595.09685.09682.35342.3534
H82.65251.44974.01803.47072.35345.09683.15592.33074.12704.73974.12704.7397
H92.65251.44974.01803.47072.35345.09683.15592.33074.73974.12704.73974.1270
H102.65253.47071.44974.01803.15592.35345.09684.12704.73972.33074.12704.7397
H112.65253.47071.44974.01803.15592.35345.09684.73974.12702.33074.73974.1270
H122.65254.01803.47071.44975.09683.15592.35344.12704.73974.12704.73972.3307
H132.65254.01803.47071.44975.09683.15592.35344.73974.12704.73974.12702.3307

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 108.909 N1 Si2 H8 111.660
N1 Si2 H9 111.660 N1 Si3 H6 108.909
N1 Si3 H10 111.660 N1 Si3 H11 111.660
N1 Si4 H7 108.909 N1 Si4 H12 111.660
N1 Si4 H13 111.660 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.762 H5 Si2 H9 108.762
H6 Si3 H10 108.762 H6 Si3 H11 108.762
H7 Si4 H12 108.762 H7 Si4 H13 108.762
H8 Si2 H9 107.004 H10 Si3 H11 107.004
H12 Si4 H13 107.004
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.727      
2 Si 0.670      
3 Si 0.670      
4 Si 0.670      
5 H -0.140      
6 H -0.140      
7 H -0.140      
8 H -0.144      
9 H -0.144      
10 H -0.144      
11 H -0.144      
12 H -0.144      
13 H -0.144      


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 -46.291 0.000 0.000
y 0.000 -46.291 0.000
z 0.000 0.000 -46.655
Traceless
 xyz
x 0.182 0.000 0.000
y 0.000 0.182 0.000
z 0.000 0.000 -0.363
Polar
3z2-r2-0.727
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 5.900 -0.000 0.000
y -0.000 5.900 0.000
z 0.000 0.000 4.050


<r2> (average value of r2) Å2
<r2> 220.154
(<r2>)1/2 14.838