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

using model chemistry: CCSD=FULL/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3H 1A'
Energy calculated at CCSD=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-927.225998
Energy at 298.15K 
HF Energy-926.535065
Nuclear repulsion energy293.327881
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 CCSD=FULL/6-31G(2df,p)
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' 2290 2156 0.00      
2 A' 2274 2142 0.00      
3 A' 1052 991 0.00      
4 A' 997 938 0.00      
5 A' 668 629 0.00      
6 A' 502 473 0.00      
7 A" 2280 2147 339.00      
8 A" 980 923 183.71      
9 A" 760 716 113.30      
10 A" 188 177 0.46      
11 A" 119 112 0.15      
12 E' 2286 2152 224.49      
12 E' 2286 2152 224.49      
13 E' 2275 2142 42.71      
13 E' 2275 2142 42.71      
14 E' 1046 985 142.49      
14 E' 1046 985 142.49      
15 E' 1006 947 185.11      
15 E' 1006 947 185.11      
16 E' 973 916 543.11      
16 E' 973 916 543.11      
17 E' 711 669 0.40      
17 E' 711 669 0.40      
18 E' 179 169 0.51      
18 E' 179 169 0.51      
19 E" 2277 2144 0.00      
19 E" 2277 2144 0.00      
20 E" 977 920 0.00      
20 E" 977 920 0.00      
21 E" 705 664 0.00      
21 E" 705 664 0.00      
22 E" 91 86 0.00      
22 E" 91 86 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 18579.1 cm-1
Scaled (by 0.9416) Zero Point Vibrational Energy (zpe) 17494.1 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 CCSD=FULL/6-31G(2df,p)
ABC
0.10428 0.10428 0.05509

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-31G(2df,p)

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.732 0.000
Si3 -1.500 -0.866 0.000
Si4 1.500 -0.866 0.000
H5 -1.412 2.171 0.000
H6 -1.175 -2.308 0.000
H7 2.586 0.137 0.000
H8 0.677 2.274 1.196
H9 0.677 2.274 -1.196
H10 -2.308 -0.551 1.196
H11 -2.308 -0.551 -1.196
H12 1.631 -1.724 1.196
H13 1.631 -1.724 -1.196

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.73171.73171.73172.58982.58982.58982.65712.65712.65712.65712.65712.6571
Si21.73172.99942.99941.47844.20713.03841.47741.47743.45923.45924.00364.0036
Si31.73172.99942.99943.03841.47844.20714.00364.00361.47741.47743.45923.4592
Si41.73172.99942.99944.20713.03841.47843.45923.45924.00364.00361.47741.4774
H52.58981.47843.03844.20714.48564.48562.40912.40913.10513.10515.08495.0849
H62.58984.20711.47843.03844.48564.48565.08495.08492.40912.40913.10513.1051
H72.58983.03844.20711.47844.48564.48563.10513.10515.08495.08492.40912.4091
H82.65711.47744.00363.45922.40915.08493.10512.39144.10994.75504.10994.7550
H92.65711.47744.00363.45922.40915.08493.10512.39144.75504.10994.75504.1099
H102.65713.45921.47744.00363.10512.40915.08494.10994.75502.39144.10994.7550
H112.65713.45921.47744.00363.10512.40915.08494.75504.10992.39144.75504.1099
H122.65714.00363.45921.47745.08493.10512.40914.10994.75504.10994.75502.3914
H132.65714.00363.45921.47745.08493.10512.40914.75504.10994.75504.10992.3914

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.295 N1 Si2 H8 111.541
N1 Si2 H9 111.541 N1 Si3 H6 107.295
N1 Si3 H10 111.541 N1 Si3 H11 111.541
N1 Si4 H7 107.295 N1 Si4 H12 111.541
N1 Si4 H13 111.541 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 109.180 H5 Si2 H9 109.180
H6 Si3 H10 109.180 H6 Si3 H11 109.180
H7 Si4 H12 109.180 H7 Si4 H13 109.180
H8 Si2 H9 108.064 H10 Si3 H11 108.064
H12 Si4 H13 108.064
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability