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Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Phosphinopnictinophosphonium frameworks.

Eamonn Conrad1, Neil Burford, Ulrike Werner-Zwanziger

  • 1Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 4J3.

Chemical Communications (Cambridge, England)
|March 24, 2010
PubMed
Summary
This summary is machine-generated.

Researchers synthesized novel branched cyclic pnictogen frameworks by reacting cyclic tetraphosphine with pnictogen cations. These findings introduce new cationic structures with unique As-P and Sb-P bonds.

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Area of Science:

  • Inorganic Chemistry
  • Organometallic Chemistry
  • Materials Science

Background:

  • Cyclic phosphines are versatile ligands in coordination chemistry.
  • Pnictogen cations offer unique reactivity and structural possibilities.
  • The synthesis of branched cyclic frameworks remains a synthetic challenge.

Purpose of the Study:

  • To synthesize and characterize novel cationic frameworks incorporating cyclic tetraphosphine and pnictogen cations.
  • To explore the coordination chemistry of cyclic tetraphosphine with arsenic and antimony cations.
  • To establish the formation of the first branched cyclic pnictogen framework.

Main Methods:

  • Reaction of cyclic tetraphosphine ((CyP)4) with pnictogen cations (R2Pn+, Pn = As, Sb; R = Cl, Ph).
  • Isolation and characterization of resulting salts using spectroscopic and crystallographic techniques.
  • Analysis of the electronic and structural properties of the new cationic frameworks.

Main Results:

  • Successful synthesis of salts containing novel cationic frameworks: [(CyP)4(AN)]+, [(CyP)4(SbCl2)]+, and [{(CyP)4}2(Sb2Cl2)]2+.
  • Characterization of these cations as coordination complexes of cyclophosphine on pnictenium cations.
  • Identification of the first branched cyclic pnictogen framework and tertiary phosphonium centers with As-P and Sb-P bonds.

Conclusions:

  • The reaction of cyclic tetraphosphine with pnictogen cations provides access to unprecedented branched cyclic pnictogen frameworks.
  • These novel structures represent new examples of coordination complexes and highlight the formation of As-P and Sb-P bonds.
  • The study expands the scope of pnictogen chemistry and offers new avenues for designing complex inorganic architectures.