Fig. 1: Reported phosphaalumenes and this work.
From: An isolable phosphaalumene(3) capable of small molecule activation via unique modes of reactivity

a Reported examples of phosphaalumenes (I-II). b This work: substituent and coordination number effects on the chemical behavior of an isolable phosphaalumene(3) [Dipp = 2,6-iPr2C6H3, Tipp = 2,4,6-iPr3C6H2].