A summary of the most common chemical descriptors (InChI Key and SMILES codes) for 1,1-difluoroethane are summarized together with 3D and 2D structures and relevant physico-chemical properties.

What is 1,1-difluoroethane?

The molecule 1,1-difluoroethane presents a molecular formula of C2H4F2 and its IUPAC name is 1,1-bis(fluoranyl)ethane.

3D structure

Cartesian coordinates

Geometry of 1,1-difluoroethane in x, y and z coordinates (Å units) to copy/paste elsewhere. Generated with Open Babel software.

2D drawing


1,1-difluoroethane NPNPZTNLOVBDOC-UHFFFAOYSA-N chemical compound 2D structure molecule svg


Molecule descriptors

IUPAC name1,1-difluoroethane
InChI codeInChI=1S/C2H4F2/c1-2(3)4/h2H,1H3

Physico-Chemical properties

IUPAC name1,1-bis(fluoranyl)ethane
Molecular formulaC2H4F2
Molecular weight66.05
Melting point (ºC)
Boiling point (ºC)
Density (g/cm3)
Molar refractivity
Topological polar surface area0

LogP and topological polar surface area (TPSA) values were estimated using Open Babel software.

The n-octanol/water partition coeficient (Kow) data is applied in toxicology and drug research. Kow values are used, to guess the environmental fate of persistent organic pollutants. High partition coefficients values, tend to accumulate in the fatty tissue of organisms. Molecules with a log(Kow) (or LogP) greater than 5 are considered to bioaccumulate.

TPSA values are the sum of the surface area over all polar atoms or molecules, mainly oxygen and nitrogen, also including hydrogen atoms.

In medicinal chemistry, TPSA is used to assess the ability of a drug to permeabilise cells.

For molecules to penetrate the blood-brain barrier (and act on receptors in the central nervous system), TPSA values below 90 Å2 are required. Thus, molecules with a polar surface area greater than 140 Å2 tend to be poorly permeable to cell membranes.