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All results from a given calculation for Zn(CH3)2 (dimethyl zinc)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no D3H 1A1'
1 2 yes D3D 1A1G

Conformer 1 (D3H)

Jump to S1C2
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-1848.340822
Energy at 298.15K 
Nuclear repulsion energy166.171575
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 MP2/3-21G*
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' 3072 2923 0.00      
2 A1' 1374 1308 0.00      
3 A1' 539 513 0.00      
4 A1" 13 13 0.00      
5 A2" 3071 2921 21.63      
6 A2" 1363 1296 20.09      
7 A2" 586 558 28.55      
8 E' 3136 2983 39.34      
8 E' 3136 2983 39.34      
9 E' 1535 1460 2.45      
9 E' 1535 1460 2.45      
10 E' 777 739 108.99      
10 E' 777 739 108.99      
11 E' 105i 100i 4.48      
11 E' 105i 100i 4.48      
12 E" 3137 2984 0.00      
12 E" 3137 2984 0.00      
13 E" 1534 1460 0.00      
13 E" 1534 1460 0.00      
14 E" 657 625 0.00      
14 E" 657 625 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 15680.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 14916.4 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 MP2/3-21G*
ABC
2.69655 0.13550 0.13550

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

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 1.919
C3 0.000 0.000 -1.919
H4 0.000 1.017 2.331
H5 0.000 1.017 -2.331
H6 -0.881 -0.508 2.331
H7 0.881 -0.508 2.331
H8 0.881 -0.508 -2.331
H9 -0.881 -0.508 -2.331

Atom - Atom Distances (Å)
  Zn1 C2 C3 H4 H5 H6 H7 H8 H9
Zn11.91941.91942.54332.54332.54332.54332.54332.5433
C21.91943.83881.09704.37051.09701.09704.37054.3705
C31.91943.83884.37051.09704.37054.37051.09701.0970
H42.54331.09704.37054.66241.76111.76114.98404.9840
H52.54334.37051.09704.66244.98404.98401.76111.7611
H62.54331.09704.37051.76114.98401.76114.98404.6624
H72.54331.09704.37051.76114.98401.76114.66244.9840
H82.54334.37051.09704.98401.76114.98404.66241.7611
H92.54334.37051.09704.98401.76114.66244.98401.7611

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 112.049 Zn1 C2 H6 112.049
Zn1 C2 H7 112.049 Zn1 C3 H5 112.049
Zn1 C3 H8 112.049 Zn1 C3 H9 112.049
C2 Zn1 C3 180.000 H4 C2 H6 106.774
H4 C2 H7 106.774 H5 C3 H8 106.774
H5 C3 H9 106.774 H6 C2 H7 106.774
H8 C3 H9 106.774
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (D3D)

Jump to S1C1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-1848.341952
Energy at 298.15K-1848.347343
Nuclear repulsion energy166.580770
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 MP2/3-21G*
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 3131 2978 27.21      
2 A1 3067 2917 7.17      
3 A1 1544 1469 2.77      
4 A1 1367 1300 1.44      
5 A1 780 742 112.63      
6 A1 553 526 1.93      
7 A1 130 124 2.88      
8 A2 3149 2996 0.00      
9 A2 1534 1459 0.00      
10 A2 628 597 0.00      
11 A2 37 35 0.00      
12 B1 3149 2995 38.94      
13 B1 1536 1461 0.89      
14 B1 754 717 109.76      
15 B1 52 50 2.89      
16 B2 3131 2978 15.10      
17 B2 3065 2916 11.35      
18 B2 1538 1463 1.67      
19 B2 1352 1286 14.71      
20 B2 664 632 5.48      
21 B2 599 569 24.47      

Unscaled Zero Point Vibrational Energy (zpe) 15879.3 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 15106.0 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 MP2/3-21G*
ABC
1.86993 0.14054 0.13739

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Zn1 0.000 0.000 0.148
C2 0.000 1.885 -0.207
C3 0.000 -1.885 -0.207
H4 0.000 1.990 -1.301
H5 0.000 -1.990 -1.301
H6 -0.881 2.419 0.164
H7 0.881 2.419 0.164
H8 0.881 -2.419 0.164
H9 -0.881 -2.419 0.164

Atom - Atom Distances (Å)
  Zn1 C2 C3 H4 H5 H6 H7 H8 H9
Zn11.91771.91772.46222.46222.57512.57512.57512.5751
C21.91773.76911.09934.02651.09571.09574.40894.4089
C31.91773.76914.02651.09934.40894.40891.09571.0957
H42.46221.09934.02653.98081.76281.76284.72974.7297
H52.46224.02651.09933.98084.72974.72971.76281.7628
H62.57511.09574.40891.76284.72971.76285.15004.8389
H72.57511.09574.40891.76284.72971.76284.83895.1500
H82.57514.40891.09574.72971.76285.15004.83891.7628
H92.57514.40891.09574.72971.76284.83895.15001.7628

picture of dimethyl zinc state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Zn1 C2 H4 106.198 Zn1 C2 H6 114.651
Zn1 C2 H7 114.651 Zn1 C3 H5 106.198
Zn1 C3 H8 114.651 Zn1 C3 H9 114.651
C2 Zn1 C3 158.657 H4 C2 H6 106.850
H4 C2 H7 106.850 H5 C3 H8 106.850
H5 C3 H9 106.850 H6 C2 H7 107.109
H8 C3 H9 107.109
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability