Thyminate(2−)-bridged cyclic tetranuclear rhodium(iii) complexes formed by a template of a sodium, calcium or lanthanoid ion

Abstract

In the thyminate(2−)-bridged tetranuclear Cp*Rh^III complexes incorporating a Na⁺, Ca²⁺ or Ln³⁺ cation, homochiral aggregation of four Rh^III centres was achieved to form metallacalix[4]arene-type clusters. The thyminate(2−) bridged two Rh^III and the third metal ion with a μ₃-1κN¹:2κ²N³,O²:3κO² mode in the Na⁺ and Ca²⁺ complexes, while in the Ln³⁺ analogues it exhibited a different bridging mode, μ₃-1κN¹:2κ²N³,O⁴:3κO².