return to home page

II.A.1. (XV.A.)

Listing of experimental data for ZnCH2 (Zinc methylene)

InChI=1S/CH2.Zn/h1H2; C=[Zn]
State Conformation
3B1 C2V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency (cm-1) Frequency Reference Intensity (km mol-1) Int. unc. Intensity Reference Comment
1 A1 2959 webbook      
2 A1 1342        
3 A1 514        
4 B1 525        
5 B2 3047        
6 B2 544        

vibrational zero-point energy: 4464.7 cm-1
Calculated vibrational frequencies for ZnCH2 (Zinc methylene).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for ZnCH2 (Zinc methylene).

Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6

Geometric Data
picture of Zinc methylene

Point Group C2v

Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4

Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å

Calculated geometries for ZnCH2 (Zinc methylene).

Bond descriptions
Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-Zn 1
H-C 2

Atom 1 Atom 2
Zn1 C2
C2 H3
C2 H4

Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   3B1
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
Calculated electric dipole moments for ZnCH2 (Zinc methylene).
Electric quadrupole moment quadrupole
Calculated electric quadrupole moments for ZnCH2 (Zinc methylene).

By selecting the following links, you may be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to
squib reference DOI
webbook NIST Chemistry Webbook (  

Got a better number? Please email us at