NO_3(SO_4)_2: Snapshot of nitrate insertion into a cationic Pt_3 metallacycle or simply a packing effect?

摘要

The X-ray crystal structure of [{(en)Pt(2,2′-bpz,N4,N4′)} _3](NO_3)_2(SO_4)_2· 13H_2O (3) reveals a NO_3~- ion sandwiched between pyrazine moieties and oriented roughly perpendicular to the Pt_3 plane, which is in contrast to the in-plane orientation of NO_3~- when a second anion (ClO_4~-) is taken up by the Pt_3 metallacycle simultaneously.