Palladium(II) macrocycles and lanterns. (29th March 2016)

• Record Type: Journal Article
• Authors: Yue, Nancy L.S.; Jennings, Michael C.; Puddephatt, Richard J.
• Is Part Of: Polyhedron. Volume 108(2016)
• Page Start: 67
• Page End: 73
• Publication Date: 2016-03-29
• Subjects: Palladium -- Host-guest -- Lantern -- Pyridine -- Macrocycle; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2015.08.003
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: The bis (N-methylamidopyridine) ligands are flexible and can act as chelating or bridging ligands, to form macrocycles or lantern complexes with varying transannular distances. Abstract: The coordination chemistry of palladium(II) with the bis (amidopyridine) ligands [LL = Ar(CONMe-4-C5 H4 N)2, with Ar = 1, 3-C6 H4 (1 ), 5- t -Bu-1, 3-C6 H3 (2 ) and 2, 5-C4 H2 S (3 ) has been investigated. The reaction of [PdCl2 (NCPh)2 ] with the ligands in a 1:1 ratio gave the corresponding neutral binuclear macrocyclic complexes trans, trans -[Pd2 Cl4 (μ-LL)2 ] in all cases. The cavity size and shape in these complexes is highly dependent on the ligand conformation and can change to accommodate guest molecules. The reaction of [PdCl2 (NCPh)2 ] with the ligands in a 1:2 ratio gave the mononuclear bis (chelate) derivative [Pd(LL)2 ] 2+, with LL = 3, but the binuclear "lantern" or "paddlewheel" complexes [Pd2 (μ-LL)4 (μ-Cl)] 3+, with LL = 1 or2 . The selective encapsulation of a chloride ion in these complexes is favored by multiple secondary bonding interactions of the types Cl⋯Pd and Cl⋯HC.