Pd Pincer Complex as a Probe To Index the Coordination Ability of Various Ligands

✍ Scribed by Maki Minakawa; Kazuhiro Takenaka; Yasuhiro Uozumi

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 83 KB
• Volume: 2007
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200700037

✦ Synopsis

Abstract

An NCN pincer palladium complex was developed as a probe molecule to index the coordination ability of various monodentate ligands. Coordination constants of 27 monodentate ligands (L) with a pincer palladium complex to form complexes of the type ArPd(L)~2~Cl were determined by ^1^H NMR spectroscopy. This allowed the coordination ability of a wide variety of ligands, including P‐coordinating ligands (phosphane, phosphite), as well as As‐coordinating AsPh~3~, and N‐coordinating pyridine, to be indexed. The differential between the highest/lowest coordination constants was 10^12^. The relative coordination ability is described in a logarithmic manner, log(K~eq(L)~/K~eq~), with respect to the value of PPh~3~ to exhibit high linearity in the Hammett plot.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)