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 Zn(CH3)2 (dimethyl zinc)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-1857.426542
Energy at 298.15K-1857.431966
Nuclear repulsion energy166.647840
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 QCISD/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 A1' 3070 2909 0.00      
2 A1' 1286 1219 0.00      
3 A1' 545 516 0.00      
4 A1" 22 21 0.00      
5 A2" 3069 2907 22.78      
6 A2" 1283 1216 4.38      
7 A2" 633 600 41.83      
8 E' 3146 2981 32.51      
8 E' 3146 2981 32.51      
9 E' 1495 1417 0.45      
9 E' 1495 1417 0.45      
10 E' 733 694 78.47      
10 E' 733 694 78.47      
11 E' 117 111 3.82      
11 E' 117 111 3.82      
12 E" 3146 2980 0.00      
12 E" 3146 2980 0.00      
13 E" 1490 1412 0.00      
13 E" 1490 1412 0.00      
14 E" 632 599 0.00      
14 E" 632 599 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15712.9 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 14886.4 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 QCISD/6-31G(2df,p)
ABC
2.71354 0.13629 0.13629

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Zn1 0.000 0.000 0.000
C2 0.000 0.000 1.913
C3 0.000 0.000 -1.913
H4 0.000 1.014 2.326
H5 0.000 1.014 -2.326
H6 -0.878 -0.507 2.326
H7 0.878 -0.507 2.326
H8 0.878 -0.507 -2.326
H9 -0.878 -0.507 -2.326

Atom - Atom Distances (Å)
  Zn1 C2 C3 H4 H5 H6 H7 H8 H9
Zn11.91321.91322.53772.53772.53772.53772.53772.5377
C21.91323.82651.09464.35921.09461.09464.35924.3592
C31.91323.82654.35921.09464.35924.35921.09461.0946
H42.53771.09464.35924.65291.75561.75564.97314.9731
H52.53774.35921.09464.65294.97314.97311.75561.7556
H62.53771.09464.35921.75564.97311.75564.97314.6529
H72.53771.09464.35921.75564.97311.75564.65294.9731
H82.53774.35921.09464.97311.75564.97314.65291.7556
H92.53774.35921.09464.97311.75564.65294.97311.7556

picture of dimethyl zinc state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Zn1 C2 H4 112.181 Zn1 C2 H6 112.181
Zn1 C2 H7 112.181 Zn1 C3 H5 112.181
Zn1 C3 H8 112.181 Zn1 C3 H9 112.181
C2 Zn1 C3 180.000 H4 C2 H6 106.631
H4 C2 H7 106.631 H5 C3 H8 106.631
H5 C3 H9 106.631 H6 C2 H7 106.631
H8 C3 H9 106.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability