: S ports people ▁from ▁London <0x0A> </s> ▁Red u ctions ▁with ▁hyd ros il anes ▁are ▁chemical ▁re actions ▁that ▁involve ▁the ▁combination ▁of ▁an ▁organ os il ane ▁( R 3 Si H ) ▁with ▁an ▁organ ic ▁substr ate ▁containing ▁uns atur ated ▁or ▁electron - with draw ing ▁functionality . ▁Product s ▁in ▁which ▁the ▁electron - with draw ing ▁group ▁has ▁been ▁replaced ▁by ▁hydro gen ▁or ▁the ▁uns atur ated ▁group ▁has ▁been ▁hydro gen ated ▁result . ▁ ▁Mechan ism ▁Sil icon ▁( 1 . 9 0 ) ▁is ▁less ▁electron eg ative ▁than ▁hydro gen ▁( 2 . 2 0 ); ▁as ▁a ▁result , ▁the ▁sil icon - h ydro gen ▁bond ▁poss esses ▁some ▁hyd rid ic ▁character . ▁In ▁the ▁presence ▁of ▁a ▁strong ▁elect roph ile , ▁organ os il anes ▁containing ▁an ▁Si - H ▁bond ▁( h yd ros il anes ) ▁can ▁serve ▁as ▁hyd ride ▁don ors ▁to ▁highly ▁elect roph il ic ▁organ ic ▁substr ates . ▁Al co h ols , ▁alk yl ▁hal ides , ▁ac et als , ▁orth o esters , ▁al ken es , ▁al de hy des , ▁k et ones , ▁and ▁car box y lic ▁acid ▁derivatives ▁may ▁be ▁reduced ▁in ▁good ▁yield ▁using ▁hyd ros il anes ▁in ▁conj unction ▁with ▁either ▁a ▁Br ø n sted ▁or ▁Lewis ▁acid ▁or ▁an ▁activ ating ▁nucle oph ile ▁( most ▁commonly ▁flu or ide ). ▁Because ▁only ▁re