return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3SeCH3 (dimethylselenide)

using model chemistry: CCD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/6-31G*
 hartrees
Energy at 0K-2477.213916
Energy at 298.15K-2477.218034
HF Energy-2476.799600
Nuclear repulsion energy185.711364
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 CCD/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 3205 3034 9.19      
2 A1 3100 2934 19.46      
3 A1 1540 1457 0.22      
4 A1 1391 1316 2.86      
5 A1 1021 966 21.33      
6 A1 595 563 0.34      
7 A1 222 210 0.05      
8 A2 3205 3034 0.00      
9 A2 1521 1439 0.00      
10 A2 922 873 0.00      
11 A2 158 149 0.00      
12 B1 3201 3029 17.95      
13 B1 1533 1451 12.80      
14 B1 958 907 11.29      
15 B1 161 153 0.32      
16 B2 3205 3034 3.23      
17 B2 3103 2937 19.48      
18 B2 1533 1451 14.53      
19 B2 1367 1294 8.98      
20 B2 899 851 0.43      
21 B2 615 582 0.47      

Unscaled Zero Point Vibrational Energy (zpe) 16726.3 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 15831.4 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 CCD/6-31G*
ABC
0.37497 0.22720 0.14965

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Se1 0.000 0.000 0.476
C2 0.000 1.462 -0.825
C3 0.000 -1.462 -0.825
H4 0.000 2.398 -0.260
H5 0.000 -2.398 -0.260
H6 0.898 1.412 -1.444
H7 -0.898 1.412 -1.444
H8 -0.898 -1.412 -1.444
H9 0.898 -1.412 -1.444

Atom - Atom Distances (Å)
  Se1 C2 C3 H4 H5 H6 H7 H8 H9
Se11.95721.95722.50842.50842.54772.54772.54772.5477
C21.95722.92441.09283.90111.09251.09253.07483.0748
C31.95722.92443.90111.09283.07483.07481.09251.0925
H42.50841.09283.90114.79571.78351.78354.08994.0899
H52.50843.90111.09284.79574.08994.08991.78351.7835
H62.54771.09253.07481.78354.08991.79663.34772.8247
H72.54771.09253.07481.78354.08991.79662.82473.3477
H82.54773.07481.09254.08991.78353.34772.82471.7966
H92.54773.07481.09254.08991.78352.82473.34771.7966

picture of dimethylselenide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Se1 C2 H4 107.232 Se1 C2 H6 110.058
Se1 C2 H7 110.058 Se1 C3 H5 107.232
Se1 C3 H8 110.058 Se1 C3 H9 110.058
C2 Se1 C3 96.681 H4 C2 H6 109.401
H4 C2 H7 109.401 H5 C3 H8 109.401
H5 C3 H9 109.401 H6 C2 H7 110.622
H8 C3 H9 110.622
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability