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

using model chemistry: MP2=FULL/3-21G

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=FULL/3-21G
 hartrees
Energy at 0K-921.898371
Energy at 298.15K 
HF Energy-921.600720
Nuclear repulsion energy284.938015
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=FULL/3-21G
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' 2208 2108 0.00 575.33 0.00 0.00
2 A' 2190 2091 0.00 73.96 0.75 0.86
3 A' 1066 1018 0.00 38.28 0.74 0.85
4 A' 989 944 0.00 21.21 0.75 0.86
5 A' 662 632 0.00 0.67 0.00 0.00
6 A' 473 451 0.00 20.49 0.10 0.18
7 A" 2188 2089 466.55 0.00 0.75 0.86
8 A" 958 914 284.69 0.00 0.75 0.86
9 A" 773 738 164.99 0.00 0.75 0.86
10 A" 241 230 0.49 0.00 0.00 0.00
11 A" 39i 37i 0.00 0.00 0.75 0.00
12 E' 2200 2101 288.74 68.55 0.75 0.86
12 E' 2200 2101 288.74 68.55 0.75 0.86
13 E' 2191 2092 75.36 2.42 0.75 0.86
13 E' 2191 2092 75.36 2.42 0.75 0.86
14 E' 1031 985 6.58 9.63 0.75 0.86
14 E' 1031 985 6.58 9.63 0.75 0.86
15 E' 1002 957 422.32 12.73 0.75 0.86
15 E' 1002 957 422.32 12.73 0.75 0.86
16 E' 974 930 594.34 51.31 0.75 0.86
16 E' 974 930 594.34 51.31 0.75 0.86
17 E' 704 672 2.54 15.35 0.75 0.86
17 E' 704 672 2.54 15.35 0.75 0.86
18 E' 210 201 0.42 0.16 0.75 0.86
18 E' 210 201 0.42 0.16 0.75 0.86
19 E" 2184 2085 0.00 106.10 0.75 0.86
19 E" 2184 2085 0.00 106.10 0.75 0.86
20 E" 949 906 0.00 46.45 0.75 0.86
20 E" 949 906 0.00 46.45 0.75 0.86
21 E" 702 670 0.00 20.47 0.75 0.86
21 E" 702 670 0.00 20.47 0.75 0.86
22 E" 64 61 0.00 0.80 0.75 0.86
22 E" 64 61 0.00 0.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18064.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 17247.9 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=FULL/3-21G
ABC
0.09807 0.09807 0.05170

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is C3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 0.000
Si2 0.000 1.788 0.000
Si3 -1.548 -0.894 0.000
Si4 1.548 -0.894 0.000
H5 -1.435 2.231 0.000
H6 -1.215 -2.358 0.000
H7 2.649 0.127 0.000
H8 0.676 2.362 1.212
H9 0.676 2.362 -1.212
H10 -2.384 -0.595 1.212
H11 -2.384 -0.595 -1.212
H12 1.708 -1.767 1.212
H13 1.708 -1.767 -1.212

Atom - Atom Distances (Å)
  N1 Si2 Si3 Si4 H5 H6 H7 H8 H9 H10 H11 H12 H13
N11.78781.78781.78782.65222.65222.65222.73962.73962.73962.73962.73962.7396
Si21.78783.09663.09661.50144.31993.12681.50181.50183.58193.58194.12554.1255
Si31.78783.09663.09663.12681.50144.31994.12554.12551.50181.50183.58193.5819
Si41.78783.09663.09664.31993.12681.50143.58193.58194.12554.12551.50181.5018
H52.65221.50143.12684.31994.59384.59382.43752.43753.21813.21815.22705.2270
H62.65224.31991.50143.12684.59384.59385.22705.22702.43752.43753.21813.2181
H72.65223.12684.31991.50144.59384.59383.21813.21815.22705.22702.43752.4375
H82.73961.50184.12553.58192.43755.22703.21812.42324.25594.89744.25594.8974
H92.73961.50184.12553.58192.43755.22703.21812.42324.89744.25594.89744.2559
H102.73963.58191.50184.12553.21812.43755.22704.25594.89742.42324.25594.8974
H112.73963.58191.50184.12553.21812.43755.22704.89744.25592.42324.89744.2559
H122.73964.12553.58191.50185.22703.21812.43754.25594.89744.25594.89742.4232
H132.73964.12553.58191.50185.22703.21812.43754.89744.25594.89744.25592.4232

picture of trisilylamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 Si2 H5 107.160 N1 Si2 H8 112.486
N1 Si2 H9 112.486 N1 Si3 H6 107.160
N1 Si3 H10 112.486 N1 Si3 H11 112.486
N1 Si4 H7 107.160 N1 Si4 H12 112.486
N1 Si4 H13 112.486 Si2 N1 Si3 120.000
Si2 N1 Si4 120.000 Si3 N1 Si4 120.000
H5 Si2 H8 108.512 H5 Si2 H9 108.512
H6 Si3 H10 108.512 H6 Si3 H11 108.512
H7 Si4 H12 108.512 H7 Si4 H13 108.512
H8 Si2 H9 107.562 H10 Si3 H11 107.562
H12 Si4 H13 107.562
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability