This is the heavier element in a binary compound used to etch glass.
A reagent containing six atoms of this element attached to a propyl group is named for Ishikawa, and this element is also present in the ligands of the N-M-R shift reagent EuFOD. This element is added to organic compounds in the Simons (SIGH-mons) process or using the Olah reagent. A functional group containing this element is the leaving group in sarin, and one isotype of it is attached to the two position in glucose in the reagent used for (*) PET scans. Three atoms of this element are present in a reagent used to cleave the t-Boc protecting group in solid phase peptide synthesis. Its 19 isotope is NMR active. A strong derivative of acetic acid has the methyl group bonded to three atoms of it, due to its inductive effect. This is the heavier element in a binary compound used to etch glass. For 10 points, name this element, the most electronegative on the periodic table.
A reagent containing six atoms of this element attached to a propyl group is named for Ishikawa, and this element is also present in the ligands of the N-M-R shift reagent EuFOD.
fluorine [accept fluoride or F]