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A New μ 4 ‐Oxo Tetranuclear Magnesium Compound: Coordination Effects of the Azolato Ligands
Author(s) -
MöschZanetti Nadia C.,
Ferbinteanu Marilena,
Magull Jörg
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200203)2002:4<950::aid-ejic950>3.0.co;2-u
Subject(s) - chemistry , magnesium , crystallography , hydrogen bond , ligand (biochemistry) , crystal structure , solid state , stereochemistry , coordination complex , intramolecular force , metal , organic chemistry , molecule , biochemistry , receptor
The μ 4 ‐oxo tetranuclear magnesium compound [Mg 4 (μ 4 ‐oxo)(μ‐tz) 6 ] 1 (tz = 3,5‐ i Pr 2 ‐1,2,4‐triazolato) with six η 1 ‐η 1 ‐bridging triazolato ligands was prepared in a one‐step reaction between MgBr 2 and tzK. The solid state structure was determined by X‐ray diffraction analysis showing the tetrahedral arrangement of the Mg 4 O core. The reaction of MgBr 2 with pzK and pzH gave [Mg(pz) 2 (pzH) 2 ] 2 (pz = 3,5‐ t Bu 2 ‐pyrazolato), which contains hydrogen bonds between two different ligands, as established by X‐ray crystal structure analysis. In solution, compound 2 shows a dynamic behavior involving two different processes. Line shape analysis of variable temperature NMR experiments suggests that the interconversion occurs via an η 2 ‐coordination of the pyrazolato ligand. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)