Ligand motifs

Numerous modifications to the bis(aryl)-a-diimine ligand motif have been reported, especially in the patent literature. The review by Ittel includes an index of diimine and related ligands in proprietary publications up to the year 2000 [26]. Instead, this discussion will focus on academic reports of Ni(II) and Pd(II) polymerization catalysts bearing a-diimine or other closely related chelating neutral nitrogen ligands. 

Figure 3.5 Pincer-ligand motifs that provide independent control of supramolecular association/dissociation kinetics relative to thermodynamics.

Altamura N, Groudinsky O, Dujardin G, Slonimski PP (1992) NAM7 nuclear gene encodes a novel member of a family of helicases with a Zn-ligand motif and is involved in mitochondrial functions in Saccha-romyces cerevisiae. J Mol Biol 224 575-587... 

One also should be aware of the cohort of proteins that provide copper resistance to bacteria that commonly are encoded by an extrachromoso-mal element. Sequence analysis indicates that one of these proteins is a multicopper oxidase since this member of the group contains the copper liganding motifs highlighted in Fig. 1. However, this member also contains a M/S-rich motif that is thought to be essential to the copper trafficking supported by a copper transporter like Ctrlp Sa. cerevisiae) (Dancis et al., 1994) or the CopA (Cha and Cooksey, 1991) and CopB... 

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