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

using model chemistry: MP2/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 MP2/cc-pVTZ
 hartrees
Energy at 0K-927.210176
Energy at 298.15K 
HF Energy-926.614958
Nuclear repulsion energy291.217686
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 MP2/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' 2288 2172 0.00 710.39 0.00 0.01
2 A' 2275 2160 0.00 82.94 0.57 0.73
3 A' 1049 996 0.00 4.35 0.74 0.85
4 A' 993 943 0.00 6.54 0.75 0.86
5 A' 664 631 0.00 0.59 0.20 0.33
6 A' 490 465 0.00 17.23 0.05 0.10
7 A" 2279 2164 393.04 0.00 0.73 0.85
8 A" 977 927 193.72 0.00 0.75 0.86
9 A" 750 712 113.77 0.00 0.75 0.86
10 A" 167 159 0.39 0.00 0.75 0.86
11 A" 100 95 0.21 0.00 0.75 0.86
12 E' 2286 2170 246.08 61.75 0.75 0.86
12 E' 2286 2170 246.08 61.75 0.75 0.86
13 E' 2274 2159 56.23 1.30 0.75 0.86
13 E' 2274 2159 56.23 1.30 0.75 0.86
14 E' 1028 976 66.37 2.70 0.75 0.86
14 E' 1028 976 66.37 2.70 0.75 0.86
15 E' 1002 952 198.73 5.17 0.75 0.86
15 E' 1002 952 198.73 5.17 0.75 0.86
16 E' 967 918 651.87 8.42 0.75 0.86
16 E' 967 918 651.87 8.42 0.75 0.86
17 E' 703 668 1.02 7.77 0.75 0.86
17 E' 703 668 1.02 7.77 0.75 0.86
18 E' 172 163 0.61 0.10 0.75 0.86
18 E' 172 163 0.61 0.10 0.75 0.86
19 E" 2276 2161 0.00 111.65 0.75 0.86
19 E" 2276 2161 0.00 111.65 0.75 0.86
20 E" 973 924 0.00 14.87 0.75 0.86
20 E" 973 924 0.00 14.87 0.75 0.86
21 E" 703 667 0.00 7.82 0.75 0.86
21 E" 703 667 0.00 7.82 0.75 0.86
22 E" 83 79 0.00 0.20 0.75 0.86
22 E" 83 79 0.00 0.20 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18481.4 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 17548.1 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 MP2/cc-pVTZ
ABC
0.10264 0.10264 0.05418

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/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 1.747 0.000
Si3 -1.513 -0.874 0.000
Si4 1.513 -0.874 0.000
H5 -1.415 2.185 0.000
H6 -1.185 -2.318 0.000
H7 2.599 0.133 0.000
H8 0.681 2.287 1.198
H9 0.681 2.287 -1.198
H10 -2.321 -0.554 1.198
H11 -2.321 -0.554 -1.198
H12 1.640 -1.733 1.198
H13 1.640 -1.733 -1.198

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.74721.74721.74722.60282.60282.60282.66982.66982.66982.66982.66982.6698
Si21.74723.02623.02621.48084.23393.06001.47991.47993.48073.48074.02954.0295
Si31.74723.02623.02623.06001.48084.23394.02954.02951.47991.47993.48073.4807
Si41.74723.02623.02624.23393.06001.48083.48073.48074.02954.02951.47991.4799
H52.60281.48083.06004.23394.50824.50822.41602.41603.12343.12345.11035.1103
H62.60284.23391.48083.06004.50824.50825.11035.11032.41602.41603.12343.1234
H72.60283.06004.23391.48084.50824.50823.12343.12345.11035.11032.41602.4160
H82.66981.47994.02953.48072.41605.11033.12342.39624.13254.77694.13254.7769
H92.66981.47994.02953.48072.41605.11033.12342.39624.77694.13254.77694.1325
H102.66983.48071.47994.02953.12342.41605.11034.13254.77692.39624.13254.7769
H112.66983.48071.47994.02953.12342.41605.11034.77694.13252.39624.77694.1325
H122.66984.02953.48071.47995.11033.12342.41604.13254.77694.13254.77692.3962
H132.66984.02953.48071.47995.11033.12342.41604.77694.13254.77694.13252.3962

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.190 N1 Si2 H8 111.379
N1 Si2 H9 111.379 N1 Si3 H6 107.190
N1 Si3 H10 111.379 N1 Si3 H11 111.379
N1 Si4 H7 107.190 N1 Si4 H12 111.379
N1 Si4 H13 111.379 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 109.380 H5 Si2 H9 109.380
H6 Si3 H10 109.380 H6 Si3 H11 109.380
H7 Si4 H12 109.380 H7 Si4 H13 109.380
H8 Si2 H9 108.109 H10 Si3 H11 108.109
H12 Si4 H13 108.109
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability