res ▁de ▁Feb rero ▁Partido ▁Category : Ar gent ine ▁football ers ▁Category : Associ ation ▁football ▁def enders ▁Category : Ar gent ine ▁exp atri ate ▁football ers ▁Category : Ex pat ri ate ▁football ers ▁in ▁Par agu ay ▁Category : Ar gent ine ▁exp atri ate ▁sports people ▁in ▁Par agu ay ▁Category : Prim era ▁B ▁Metropol it ana ▁players ▁Category : Prim era ▁B ▁Nacional ▁players ▁Category : Par agu ay an ▁Primera ▁División ▁players ▁Category : Al mag ro ▁football ers ▁Category : Sol ▁de ▁América ▁football ers <0x0A> </s> ▁{{ DIS P LAY T IT LE : SN 1 ▁reaction }} ▁The ▁SN 1 ▁reaction ▁is ▁a ▁substitution ▁reaction ▁in ▁organ ic ▁chem istry . ▁" SN " ▁stands ▁for ▁" n uc le oph il ic ▁substitution ", ▁and ▁the ▁" 1 " ▁says ▁that ▁the ▁rate - det erm ining ▁step ▁is ▁un im ole cular . ▁Thus , ▁the ▁rate ▁equation ▁is ▁often ▁shown ▁as ▁having ▁first - order ▁dependence ▁on ▁elect roph ile ▁and ▁zero - order ▁dependence ▁on ▁nucle oph ile . ▁This ▁relationship ▁holds ▁for ▁situations ▁where ▁the ▁amount ▁of ▁nucle oph ile ▁is ▁much ▁greater ▁than ▁that ▁of ▁the ▁intermediate . ▁Instead , ▁the ▁rate ▁equation ▁may ▁be ▁more ▁accur ately ▁described ▁using ▁steady - state ▁k inet ics . ▁ ▁The ▁reaction ▁involves ▁a ▁car b ocation ▁intermediate ▁and ▁is ▁commonly ▁seen ▁in ▁re actions ▁of ▁secondary ▁or ▁t ert i ary ▁alk yl ▁hal ides ▁under ▁strongly