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New features in pentacoordinate phosphorus chemistry.

K C Kumara Swamy1, N Satish Kumar

  • 1School of Chemistry, University of Hyderabad, Hyderabad 500 046, Andhra Pradesh, India. kckssc@uohyd.ernet.in

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Summary

Reactions involving phosphorus often feature pentacoordinate species. This study reveals exceptions to traditional apicophilicity rules, highlighting the complex coordination chemistry of phosphorus compounds.

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Area of Science:

  • Chemistry
  • Biochemistry
  • Structural Chemistry

Background:

  • Pentacoordinate phosphorus species are common in chemical and biochemical reactions.
  • Understanding their structure and reactivity is crucial for various scientific disciplines.

Purpose of the Study:

  • To review recent developments in pentacoordinate phosphorus chemistry.
  • To compare new findings with existing literature on phosphorus coordination.
  • To analyze factors influencing tetra- vs. pentacoordination.

Main Methods:

  • Literature review of recent advancements.
  • Analysis of experimental data from the authors' laboratory.
  • Database search for P-O and P-N bond distances in specific systems.

Main Results:

  • Established apicophilicity rules are often oversimplified, with notable exceptions.
  • Fluxional behavior and bond parameters of pentacoordinate phosphorus were investigated.
  • Database analysis revealed extremes in P-O and P-N bond distances.

Conclusions:

  • The coordination chemistry of phosphorus is more complex than previously assumed.
  • Apicophilicity rules require refinement based on new evidence.
  • Further research into phosphorus bonding and coordination is warranted.