Difluorine monoxide Other names: Difluorine monooxide; Difluorine monoxide; Fluorine monoxide; Fluorine oxide; OF2; Oxydifluoride; Oxygen fluoride; Oxygen fluoride (OF2); UN 2190. InChI: InChI=1S/F2O/c1-3-2 InChI Key: UJMWVICAENGCRF-UHFFFAOYSA-N Formula: F2O SMILES: FOF Molecular Weight: 54.00 CAS: 7783-41-7 Physical Properties Property Value Unit Source ∆ G° -545.50 kJ/mol Joback Method f ∆ H° -567.77 Joback Method f gas kJ/mol ∆ H° 3.10 Joback Method fus kJ/mol ∆ H° 16.37 Joback Method vap kJ/mol IE 13.11 ± 0.01 eV NIST Webbook IE 13.11 ± 0.01 eV NIST Webbook IE 13.11 eV NIST Webbook IE 13.13 eV NIST Webbook IE 13.26 eV NIST Webbook logP 0.77 Crippen Method oct/wat P 5695.98 Joback Method c kPa T 127.90 ± 0.30 NIST Webbook boil K T 355.35 Joback Method c K T 49.40 ± 0.25 NIST Webbook fus K V 0.09 3 Joback Method c m /kg-mol Temperature Dependent Properties Property Value Unit Temperature (K) Source C 37.05 J/mol×K 220.36 Joback Method p,gas Sources Joback Method: https://en.wikipedia.org/wiki/Joback_method NIST Webbook: http://webbook.nist.gov/cgi/inchi/InChI=1S/F2O/c1-3-2 Crippen Method: http://pubs.acs.org/doi/abs/10.1021/ci990307l Legend C : Ideal gas heat capacity (J/mol×K). p,gas ∆ G°: Standard Gibbs free energy of formation (kJ/mol). f ∆ H° : Enthalpy of formation at standard conditions (kJ/mol). f gas ∆ H°: Enthalpy of fusion at standard conditions (kJ/mol). fus ∆ H°: Enthalpy of vaporization at standard conditions (kJ/mol). vap IE: Ionization energy (eV). logP : Octanol/Water partition coefficient . oct/wat P : Critical Pressure (kPa). c T : Normal Boiling Point Temperature (K). boil T : Critical Temperature (K). c T : Normal melting (fusion) point (K). fus V : Critical Volume (m3/kg-mol). c Latest version available from: https://www.chemeo.com/cid/13-739-7/Difluorine%20monoxide Generated by Cheméo on Sat, 25 Sep 2021 18:12:50 +0000. Cheméo (https://www.chemeo.com) is the biggest free database of chemical and physical data for the process industry..