Studies on the metalamide bond. IX. Metal complexes of some sterically hindered bis-picolinamide tetradentate ligands

Ross L. Chapman*, Frederick S. Stephens, Robert S. Vagg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

The synthesis is described of some bis-picollinamide ligands in which N4 tetradentate function on coordination would enfore severe intramolecular steric interactions. These ligands are N,N′-bis(6′-methylpyridine-2′-carboxamide)-1-ethane (6-mebpenH2), N,N′-bis(6′-mehtylpyridine-2′-carboxamide)-1,2-benzene (6-mebpbH2) and N,N′N-bis(2′-quinolylcarboxamine)-1,2-ethane (bqenH2). Their complexing abilities with bivalent Cu, Ni and Pd have been studies, and comparison are made with analogous unhindered ligands reported previously. The complexes isolated each have characterized by microanalysis, magnetic susceptibility, thermogravimetrinc analysis, and by visible, i.r. and n.m.r. spectral data. In the compound Pd(6-mebpenH2)Cl2 the ligand displays an apparent unique trans-bidentate function. The deprotonated complexes isolated with the three ligands have N4 tetradentate coordination, with resultant steric strain. Deuterium isotopic substitution has been used to assist with i.r. assignments.

Original languageEnglish
Pages (from-to)161-168
Number of pages8
JournalInorganica Chimica Acta
Volume52
Issue numberC
DOIs
Publication statusPublished - 1981
Externally publishedYes

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