Palladium(II) chloride complexes of bis(pyrazolyl)cyclotriphosphazenes

Abstract

Reactions of the bis(3,5-dimethylpyrazolyl)cyclotriphosphazene derivatives gem-N₃P₃(MeNCH₂CH₂O)₂(dmp)₂ (1) and nongeminal cis-N₃P₃(OPh)₄(dmp)₂ (2) with PdCl₂ afford complexes of the type [PdCl₂·(L)] (L = 1 or 2). In these complexes, the phosphazenes act as bidentate NN-donor ligands with the two pyrazolyl pyridinic nitrogen atoms bonded to the metal, thus forming a six- and an eight-membered chelate ring, respectively. The structures of 2 and [PdCl₂·(2)] (4) have been confirmed by single-crystal X-ray diffraction. Crystal data for 2 : a = 16.759(2) Å, b = 10.788(3) Å, c = 19.635(9) Å, β = 101.61(3)°, P2_1/c, Z = 4, R = 0.038 for 4688 reflections with F > 5 σ(F). Crystal data for 4 : a = 9.701(3) Å, b = 24.853(4) Å, c = 15.794(4) Å, β= 101.46(2)°, P2_1/n, Z = 4, R = 0.030 for 5416 reflections with F> 5 σ(F).