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All results from a given calculation for CH3SeCH3 (dimethylselenide)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at G3
 hartrees
Energy at 0K-2480.695080
Energy at 298.15K-2480.688857
HF Energy-2478.760898
Nuclear repulsion energy186.372399
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 HF/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3330 3137 15.34      
2 A1 3235 3048 30.45      
3 A1 1634 1540 0.08      
4 A1 1487 1401 7.10      
5 A1 1089 1026 23.58      
6 A1 623 587 1.14      
7 A1 234 221 0.01      
8 A2 3332 3139 0.00      
9 A2 1615 1522 0.00      
10 A2 979 923 0.00      
11 A2 166 156 0.00      
12 B1 3329 3136 29.00      
13 B1 1627 1533 10.61      
14 B1 1015 956 9.24      
15 B1 171 162 0.34      
16 B2 3330 3138 6.27      
17 B2 3236 3049 39.87      
18 B2 1627 1533 12.89      
19 B2 1460 1376 21.61      
20 B2 952 897 0.13      
21 B2 645 608 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 17557.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 16542.7 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/6-31G*
ABC
0.37806 0.23014 0.15138

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 0.000 0.474
C2 0.000 1.452 -0.821
C3 0.000 -1.452 -0.821
H4 0.000 2.386 -0.258
H5 0.000 -2.386 -0.258
H6 0.896 1.402 -1.439
H7 -0.896 1.402 -1.439
H8 -0.896 -1.402 -1.439
H9 0.896 -1.402 -1.439

Atom - Atom Distances (Å)
  Se1 C2 C3 H4 H5 H6 H7 H8 H9
Se11.94581.94582.49582.49582.53592.53592.53592.5359
C21.94582.90431.09043.87911.09011.09013.05513.0551
C31.94582.90433.87911.09043.05513.05511.09011.0901
H42.49581.09043.87914.77191.77941.77944.06814.0681
H52.49583.87911.09044.77194.06814.06811.77941.7794
H62.53591.09013.05511.77944.06811.79293.32872.8046
H72.53591.09013.05511.77944.06811.79292.80463.3287
H82.53593.05511.09014.06811.77943.32872.80461.7929
H92.53593.05511.09014.06811.77942.80463.32871.7929

picture of dimethylselenide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Se1 C2 H4 107.311 Se1 C2 H6 110.558
Se1 C2 H7 110.558 Se1 C3 H5 107.311
Se1 C3 H8 110.558 Se1 C3 H9 110.558
C2 Se1 C3 97.725 H4 C2 H6 109.132
H4 C2 H7 109.132 H5 C3 H8 109.132
H5 C3 H9 109.132 H6 C2 H7 110.087
H8 C3 H9 110.087
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability