In an SN1 reaction, 1-bromohexane reacts with NaOH, but would the Na or H be the nucleophile that substitutes the Bromine?
SN1 is very less likely to be followed in 1-bromohexane, rather a SN2 pathway will be followed. OH- replaces Br as Br- as Br is a good leaving group. This has nothing to do with product stability. The haloalkane substrate is reactive so it reacts, as simple as that.