oxygen difluoride oxygen difluoride chebi_ontology InChI=1S/F2O/c1-3-2 FOF Difluorine monoxide UJMWVICAENGCRF-UHFFFAOYSA-N 0 Fluorine monoxide OF2 53.99172 F2O MolBase:972 Gmelin:1054 [OF2] difluoridooxygen CAS:7783-41-7 53.99621 CHEBI:30494 oxygen halide