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Nickel(II) Complexes with a Hydroxyl Pendant‐Armed Macrocyclic Ligand: Synthesis, Characterization, and Crystal Structures
Author(s) -
HosseiniYazdi Seyed Abolfazl,
Khandar Ali Akbar,
Azizi Hashem
Publication year - 2008
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.200700481
Subject(s) - nickel , chemistry , ligand (biochemistry) , octahedron , coordination sphere , macrocyclic ligand , crystal structure , crystallography , coordination complex , octahedral molecular geometry , metal , coordination geometry , stereochemistry , molecule , hydrogen bond , organic chemistry , biochemistry , receptor
Abstract The reactions of different nickel(II) salts with a mixed‐donor macrocyclic ligand L (6,7,8,9,10,11,18,19‐octahydro‐5H, 17H‐dibenzo[f,o][1,5,9,13] dioxadiazacyclohexadecin‐18‐ol), potentially pentadentate N 2 O 3 donor sets containing one pendant alcohol function have been investigated. The physical properties and the chemical structures of 1:1 (metal:ligand) NiLX 2 (X = Cl − , Br − , NO 3 − , ClO 4 − ) complexes have been characterized by using IR, UV‐Vis spectroscopy and conductance measurements. The X‐ray determination have been employed to probe the nature of the respective complexes in solid state. The nickel atom in [NiL(NO 3 )]NO 3 ·0.5H 2 O complex is six‐coordinate with a distorted octahedral coordination in which the all N 2 O 3 donor atoms are coordinated to the nickel atom. The coordination sphere is completed by a nitrate anion. In contrast to the above nickel complex, in [NiLCl 2 ] complex the pendant hydroxyl arm of macrocycle remains uncoordinated and ligand acts as tetradentate N 2 O 2 donor atoms. The coordination sphere is completed by two chloride anions and the nickel atom is six‐coordinate with a distorted octahedral coordination.