title: "Breaking the Rules": A Planar Phosphonium Cation.
abstract: Long-standing tenets of a discipline must be questioned in an effort to fully understand the fundamentals of science. This is exemplified by the synthesis of planar-tetracoordinate compounds, such as the square-planar phosphonium ion 1 by Driess et al., which provide exceptions to van't Hoff - Le Bel rules.
authors.initials: DW
authors.lastname: Stephan