SEARCH Articles Figures Tables Chirality at Nitrogen, Phosphorus, and Sulfur Enzymatic substitution at phosphorus Nucleophilic Attack at Phosphorus Nucleophilic Substitution at Phosphorus in Ribonuclease Nucleophilic Substitution at the Nitrogen, Phosphorus, and Sulfur Centers Nucleophilic displacements at phosphorus Nucleophilic reactions at acyclic phosphorus esters Nucleophilic substitution at phosphorus Reaction at a Phosphorus, Arsenic, or Antimony Atom Reactions at Phosphorus Stereochemistry at phosphorus Substitution at Pentacoordinate Phosphorus Substitution at Tetracoordinate Phosphorus Substitution at Tricoordinate Sulfur and Phosphorus Centers Substitution at phosphorus