Reactions of the cyclic tetraphosphine (CyP)(4) with arsenium or stibenium cations (R(2)Pn(+), Pn = As, Sb and R = Cl, Ph) give salts of the new cationic frameworks [(CyP)(4)(AN)](+), [(CyP)(4)(SbCl(2))](+) and [{(CyP)(4)}(2)(Sb(2)Cl(2))](2+). The cations can be viewed as coordination complexes of a cyclophosphine ligand on a pnictenium cation, or a cyclo-2,3,4-triphosphino-1-pnictino-1-phosphonium cation, representing the first branched cyclic pnictogen framework, and examples of tertiary phosphonium centers with As-P or Sb-P bonds.