my dear, this link maybe help you

 https://en.wikipedia.org/wiki/Grignard_reaction

i have seen this but is it effective for iron?

I don't think that aryl iron complexes would be particularly active as nucleophiles (based on electronegativity: Li (0.97), Mg (1.23), and Al (1.47), form quite nucleophilic organometallic compounds, while Zn (1.66) organometallic nucleophiles often require a catalyst. Fe (1.64) is likely to follow this trend.)

This does not mean that organoiron compounds don't act as nucleophiles, or couldn't be used as such. Certainly there are examples of iron complexes useful as catalysts for C-C bond forming reactions, which probably go through an intermediate that could be considered an organoiron nucleophile.

What are you trying to do?

I am trying to form a nucleophile from an aryl iron compounds to test on an electrophilic nitrogen compound I synthesized. Have you heard of umplong chemistry? Usually grignards are used for this, I am looking for alternative methods particularly with iron as my focus