This reaction proceeds through a free radical intermediate and has the possibility of alkene formation in case of tertiary haloalkanes and vicinal dihalides.
ðɪs ɹɪˈækʃən pɹˈoʊsiːdz θɹuː ɐ fɹˈiː ɹˈædɪkəl ˌɪntɚmˈiːdiət ænd hɐz ðə pˌɑːsəbˈɪlᵻɾi ʌv ˈælkiːn fɔːɹmˈeɪʃən ɪn kˈeɪs ʌv tˈɜːʃjɚɹi hˈeɪloʊlkˌeɪnz ænd vˈɪsɪnəl daɪhˈælaɪdz.