[NO3⊂{(en)Pt(2,2′-bpz)}3]NO3(SO4)2: Snapshot of nitrateinsertion into a cationic Pt3 metallacycle or simply a packing effect?

Abstract

The X-ray crystal structure of [{(en)Pt(2,2′-bpz,N4,N4′)}₃](NO₃)₂(SO₄)₂·13H₂O (3) reveals a NO₃⁻ ion sandwiched between pyrazine moieties and oriented roughly perpendicular to the Pt₃ plane, which is in contrast to the in-plane orientation of NO₃⁻ when a second anion (ClO₄⁻) is taken up by the Pt₃ metallacycle simultaneously.