Does "Ahmed" deserve a commission on the copper deal, knowing that he introduced the questioner to "Saad" regarding the iron deal, and knows nothing about the copper [deal]?

The person who performed the work is entitled to the commission, because the commission is only deserved by the one who carried out the work for which it was designated. The second marketer, named "Ahmad," is not entitled to a commission because he did not exert effort in this transaction and has no connection to it.