Usually fluorine is located in the seventh(VII) group as fluorine has 7 electrons in it's outer shell with chemical symbol "F" Fluorine has 7 electrons in it's outer shell therefore, it needs one more electron to get the noble gas configuration. So more electrons means negative ion.
This process is an example of Esterification: in which an alcohol and an organic compound are combined to form ester(which gives fruit like pleasant odor), the most commonly discussed ester is ethyl-ethanoate.
