Premium
Influence of Steric Hindrance of N‐Heterocyclic Ancillary Ligands on the Structure and Magnetic Properties of Manganese(II) Coordination Polymers
Author(s) -
Jiang Jun,
Huang Wei,
Xu Jun,
Pan FeiFei,
Wu DaYu
Publication year - 2016
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500707
Subject(s) - steric effects , chemistry , supramolecular chemistry , crystallography , manganese , ligand (biochemistry) , hydrogen bond , crystal structure , antiferromagnetism , stereochemistry , molecule , organic chemistry , biochemistry , receptor , physics , condensed matter physics
Three biphenyl‐3,5‐dicarboxylic acid (H 2 L ) based coordination polymers, namely, [Mn 3 ( L ) 3 (2,2′‐bpy) 2 ] n ( 1 ), {[Mn( L )(phen)] · (MeOH)} n ( 2 ), and [Mn( L )(dipt)] n ( 3 ), (2,2′‐bpy = 2,2′‐bipyridine, phen = 1,10‐phenanthroline, and dipt = 2,9‐dimethyl‐1,10‐phenanthroline) were synthesized and characterized by single‐crystal X‐ray diffraction and analyses of their magnetic properties. 1 is a trinuclear manganese structure with a 2D motifs, which can join by hydrogen bond bridges to give 3D supramolecular architectures. 2 has a dinuclear center forming a 1D supramolecular ladder chain. The mononuclear complex 3 displays 1D metal‐organic chains driven by μ 2 ‐ L linkers. Their structural differences were investigated, revealing that the influence of steric hindrance on the structures of acid‐based coordination polymers is realized through changing the N‐heterocyclic ancillaries of diverse steric hindrance. Obviously, with decreasing of the steric hindrance of the N‐donor ligand, complexes 1 – 3 show structures from 1D to 2D and mononuclear to multinuclear. Magnetic susceptibility measurements indicate that 1 and 2 have dominating antiferromagnetic couplings between metal ions, whereas compound 3 is paramagnetic.