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: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-1859.021025
Energy at 298.15K-1859.026519
Nuclear repulsion energy166.790866
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 mPW1PW91/6-31G**
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' 3062 2914 0.00      
2 A1' 1278 1216 0.00      
3 A1' 543 517 0.00      
4 A1" 41 39 0.00      
5 A2" 3060 2912 25.83      
6 A2" 1274 1213 9.62      
7 A2" 642 611 41.11      
8 E' 3142 2990 31.51      
8 E' 3142 2990 31.52      
9 E' 1462 1391 1.34      
9 E' 1462 1391 1.34      
10 E' 750 714 85.81      
10 E' 750 714 85.82      
11 E' 122 116 2.55      
11 E' 122 116 2.55      
12 E" 3142 2990 0.00      
12 E" 3142 2990 0.00      
13 E" 1459 1388 0.00      
13 E" 1459 1388 0.00      
14 E" 644 613 0.00      
14 E" 644 613 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15672.3 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 14912.2 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 mPW1PW91/6-31G**
ABC
2.71158 0.13658 0.13658

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

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 1.911
C3 0.000 0.000 -1.911
H4 0.000 1.014 2.324
H5 0.000 1.014 -2.324
H6 -0.878 -0.507 2.324
H7 0.878 -0.507 2.324
H8 0.878 -0.507 -2.324
H9 -0.878 -0.507 -2.324

Atom - Atom Distances (Å)
  Zn1 C2 C3 H4 H5 H6 H7 H8 H9
Zn11.91111.91112.53592.53592.53592.53592.53592.5359
C21.91113.82211.09504.35511.09501.09504.35514.3551
C31.91113.82214.35511.09504.35514.35511.09501.0950
H42.53591.09504.35514.64881.75621.75624.96944.9694
H52.53594.35511.09504.64884.96944.96941.75621.7562
H62.53591.09504.35511.75624.96941.75624.96944.6488
H72.53591.09504.35511.75624.96941.75624.64884.9694
H82.53594.35511.09504.96941.75624.96944.64881.7562
H92.53594.35511.09504.96941.75624.64884.96941.7562

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 112.177 Zn1 C2 H6 112.177
Zn1 C2 H7 112.177 Zn1 C3 H5 112.177
Zn1 C3 H8 112.177 Zn1 C3 H9 112.177
C2 Zn1 C3 180.000 H4 C2 H6 106.635
H4 C2 H7 106.635 H5 C3 H8 106.635
H5 C3 H9 106.635 H6 C2 H7 106.635
H8 C3 H9 106.635
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Zn 0.616      
2 C -0.731      
3 C -0.731      
4 H 0.141      
5 H 0.141      
6 H 0.141      
7 H 0.141      
8 H 0.141      
9 H 0.141      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.420 0.000 0.000
y 0.000 -27.420 0.000
z 0.000 0.000 -33.105
Traceless
 xyz
x 2.843 0.000 0.000
y 0.000 2.843 0.000
z 0.000 0.000 -5.685
Polar
3z2-r2-11.371
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.536 0.000 0.000
y 0.000 5.536 0.000
z 0.000 0.000 8.319


<r2> (average value of r2) Å2
<r2> 100.721
(<r2>)1/2 10.036