Synthesis And Structural Characterization Of Metal Organic Complexes Diazaphospholide Ligands

Five-membered 1,2,4-diazaphospholide complexes have recently attracted great interest. Complexes with 1,2,4-diazaphospholide ligands are potential in organic synthesis, catalysis, and new materials. This paper describes the synthesis of1,2,4-diazaphospholide sandwich ferric complexes and a few of2,6-?bis-1,2,4-diazaphosphol-1-yl?pyridine nickel?II?, cobalt?II?, and iron?II? complexes. All complexes were characterized by melting point determination, nuclear magnetic resonance?NMR?, and X-Ray single crystal diffraction analysis.1. The reaction of potassium 3,5-di-tert-butyl-1,2,4-diazaphospholide and potassium 3,5-di-phenyl-1,2,4-diazaphospholide with Cp*Li, and iron dichloride in a ratio of 1:1:1 gave complexes[Cp*Fe?3,5-t Bu₂dp?] and [Cp*Fe?3,5-Ph2dp?], respectively.2. The reaction of 2,6-bis?1,2,4-diazaphosphol-1-yl?pyridine and Fe?BF₄?₂?6H₂O, Co?BF₄?₂?6H₂O, and Ni?BF₄?₂?6H₂O in a ratio of 2:1 gave complexes {[?2,6-dp₂?py]₂Fe}²⁺?BF₄?₂^–, {[?2,6-dp₂?py]₂Co}²⁺?BF₄?₂^–,{[?2,6-dp₂?py]2Ni}²⁺?BF₄?₂^–, respectively.