Rivard, Eric Lough, Alan J. Manners, Ian A New, Convenient Synthesis of the Linear Phosphazene Salt [Cl<sub>3</sub>PNPCl<sub>3</sub>]Cl:  Preparation of Higher Linear Homologues [Cl<sub>3</sub>PN−(PCl<sub>2</sub>N)<i><sub>x</sub></i>PCl<sub>3</sub>]Cl (<i>x</i> = 1−3) and the 16-Membered Macrocycle [NCCl(NPCl<sub>2</sub>)<sub>3</sub>]<sub>2</sub> An improved synthetic route to the linear phosphazene salt [Cl<sub>3</sub>PNPCl<sub>3</sub>]Cl is reported. This species is a useful precursor to higher linear homologues and also to heterocycles such as the 16-membered carbophosphazene macrocycle [NCCl(NPCl<sub>2</sub>)<sub>3</sub>]<sub>2</sub>. phosphazene salt;Linear Phosphazene Salt;Cl;Convenient Synthesis;Linear Homologues 2004-05-03
    https://acs.figshare.com/articles/journal_contribution/A_New_Convenient_Synthesis_of_the_Linear_Phosphazene_Salt_Cl_sub_3_sub_P_N_PCl_sub_3_sub_Cl_Preparation_of_Higher_Linear_Homologues_Cl_sub_3_sub_P_N_PCl_sub_2_sub_N_i_sub_x_sub_i_PCl_sub_3_sub_Cl_i_x_i_1_3_and_the_16_Membered_Macrocycle_NCCl_NPCl_sub_2_su/3340921
10.1021/ic049955z.s002