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Intramolecular Hydrogen Bonding of a Chloride Acceptor Supported by a Dinuclear Nickel(II) Complex with N ‐Salicylidene Hydrazide Ligand: Crystal Structure and Magnetic Properties
Author(s) -
Burkhardt Anja,
Buchholz Axel,
Görls Helmar,
Plass Winfried
Publication year - 2013
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.201300418
Subject(s) - hydrogen bond , chemistry , crystallography , intramolecular force , ligand (biochemistry) , supramolecular chemistry , nickel , crystal structure , stacking , hydrazide , molecule , stereochemistry , organic chemistry , biochemistry , receptor
The dinuclear phenoxido‐bridged nickel(II) complex [{Ni(Hsalhyph)Cl(H 2 O)} 2 ] with the hydrazone ligand H 2 salhyph, derived from salicylaldehyde and benzoic acid hydrazide, has been synthesized and structurally characterized. The dinuclear Ni 2 O 2 core unit of the complex facilitates the formation of intramolecular O–H ··· Cl hydrogen bonds. The chlorido ligand is involved in additional N–H ··· Cl hydrogen bonding leading to an aggregation of the dinuclear complexes forming one‐dimensional staged chains. Within the chains the supramolecular structure is governed by hydrogen bonding and π–π‐stacking interactions. In the crystal structure two additional DMF molecules of crystallization are present per dinuclear complex. The DMF molecules are located between the chains and involved in O–H ··· O=C hydrogen bonding with the aqua ligands of the dinickel core. Magnetic susceptibility measurements show the presence of antiferromagnetic exchange interactions ( H = – JS 1 S 2 ) with J = –14.8 cm –1 between the nickel(II) ions and indicate a zero‐field‐splitting of D = 12.6 cm –1 .