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Self‐Assembly and C−H⋅⋅⋅Anion Hydrogen Bonding of Palladium(II)‐based Metallacalixarenes Using Pyridyl‐ or Phenyl‐Bridged Di‐Naphthoimidazoles
Author(s) -
Deng Wei,
Yu ZhengSu,
Liu XueHui,
Yu ShuYan
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801345
Subject(s) - palladium , chemistry , hydrogen bond , benzene , pyridine , counterion , metal , ion , crystal structure , crystallography , self assembly , molecule , ligand (biochemistry) , stereochemistry , medicinal chemistry , catalysis , receptor , organic chemistry , biochemistry
Metal‐directed self‐assembly approaches led to the formation of two novel boat‐shaped palladium(II)‐based metallacalixarenes 1 ( 1 a, 1 b and 1 c ) and 2 ( 2 a, 2 b and 2 c ), by using the two new ligands 2,6‐bis(1H‐naphtho[2,3]imidazol‐1‐yl)pyridine ( L 1 ) and 1,3‐bis(1H‐naphtho[2,3]imidazol‐1‐yl)benzene ( L 2 ) with cis ‐coordinated Pd II precursor (tmeda)Pd(ONO 2 ) 2 (tmeda=N, N, N′, N′‐tetra‐methylethylenediamine), repectively. All complexes with different counterions were systematically characterized in solution, and their structures were determined by X‐ray single crystallography analyses in the solid state. The crystal architectures were subtly regulated among different anions through two types (inter‐ and intra‐)molecular C−H hydrogen bonding interactions and other weak interactions. The anion complexation with the two metal‐assembled anion receptors were further investigated in solution.