C–H activation in a co-ordinated catenand: ortho-metallation of cat30 by palladium(II)

Abstract

Insertion of Pd²⁺ into the catenand ligand cat30 yields the monocation [Pd^II(cat30–H)]⁺via ortho-metallation of one of the ligand phenyl rings to give square planar co-ordination by an N₃C donor set, Pd–N(1)= 2.139(11), Pd–N(3)= 2.286(10), Pd–N(4)= 1.961(10), Pd–C(71)= 2.017(7)Å; the N-atom N(2) associated with the phenanthroline (phen) chelate incorporating N(1) lies 2.559(11)Å from the metal centre making this phen moiety monodenatate to the Pd^II centre.