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: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-1850.248274
Energy at 298.15K 
Nuclear repulsion energy169.318549
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 mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1' 3060 2906 0.00      
2 A1' 1355 1286 0.00      
3 A1' 579 550 0.00      
4 A1" 43 41 0.00      
5 A2" 3058 2904 21.38      
6 A2" 1345 1277 46.12      
7 A2" 626 594 29.20      
8 E' 3125 2968 30.04      
8 E' 3125 2968 30.03      
9 E' 1512 1436 7.13      
9 E' 1512 1436 7.14      
10 E' 796 756 104.06      
10 E' 796 756 104.06      
11 E' 105i 100i 3.14      
11 E' 105i 100i 3.14      
12 E" 3126 2968 0.00      
12 E" 3126 2968 0.00      
13 E" 1509 1433 0.00      
13 E" 1509 1433 0.00      
14 E" 679 645 0.00      
14 E" 679 645 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15674.6 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 14884.6 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 mPW1PW91/3-21G*
ABC
2.70860 0.14141 0.14141

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

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 1.875
C3 0.000 0.000 -1.875
H4 0.000 1.015 2.292
H5 0.000 1.015 -2.292
H6 -0.879 -0.507 2.292
H7 0.879 -0.507 2.292
H8 0.879 -0.507 -2.292
H9 -0.879 -0.507 -2.292

Atom - Atom Distances (Å)
  Zn1 C2 C3 H4 H5 H6 H7 H8 H9
Zn11.87451.87452.50652.50652.50652.50652.50652.5065
C21.87453.74911.09714.28831.09711.09714.28834.2883
C31.87453.74914.28831.09714.28834.28831.09711.0971
H42.50651.09714.28834.58401.75721.75724.90934.9093
H52.50654.28831.09714.58404.90934.90931.75721.7572
H62.50651.09714.28831.75724.90931.75724.90934.5840
H72.50651.09714.28831.75724.90931.75724.58404.9093
H82.50654.28831.09714.90931.75724.90934.58401.7572
H92.50654.28831.09714.90931.75724.58404.90931.7572

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 112.367 Zn1 C2 H6 112.367
Zn1 C2 H7 112.367 Zn1 C3 H5 112.367
Zn1 C3 H8 112.367 Zn1 C3 H9 112.367
C2 Zn1 C3 180.000 H4 C2 H6 106.426
H4 C2 H7 106.426 H5 C3 H8 106.426
H5 C3 H9 106.426 H6 C2 H7 106.426
H8 C3 H9 106.426
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Zn 0.811      
2 C -1.112      
3 C -1.112      
4 H 0.236      
5 H 0.236      
6 H 0.236      
7 H 0.236      
8 H 0.236      
9 H 0.236      


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 -27.720 0.000 0.000
y 0.000 -27.720 0.000
z 0.000 0.000 -33.925
Traceless
 xyz
x 3.103 0.000 0.000
y 0.000 3.103 0.000
z 0.000 0.000 -6.206
Polar
3z2-r2-12.411
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 5.415 0.000 0.000
y 0.000 5.415 0.000
z 0.000 0.000 7.355


<r2> (average value of r2) Å2
<r2> 98.467
(<r2>)1/2 9.923