Structure and magnetic properties of the AB(HCO2)3 (A = Rb+ or Cs+, B = Mn2+, Co2+ or Ni2+) frameworks: probing the effect of size on the phase evolution of the ternary formates

摘要: This work reports the synthesis and structures of six new AB(HCO2)3 (A = Rb+ or Cs+ B Mn2+, Co2+ Ni2+) frameworks containing largest monoatomic cations on A-site. RbMn(HCO2)3 is found to adopt a distorted perovskite framework with 412·63 topology mixture syn–anti anti–anti ligands, while remaining compounds chiral hexagonal structure 49·66 topology. The these clarify effect ionic size formation five known architectures adopted by frameworks, which have attracted attention as class potential multiferroics, in particular within this. also highlights role molecular A-site stabilising for where such are too large small support this basis alone, possibly due hydrogen bonding. magnetic properties RbB(HCO2)3 CsMn(HCO2)3 reported featuring weak ferromagnetic behaviour latter being purely antiferromagnetic. In conjunction comparison other isostructural we find that adopting much higher ordering temperatures than those structure, highlighting importance understanding structure–property relationships ternary formates.