The building block approach to extended solids: 3,5-pyrazoledicarboxylate coordination compounds of increasing dimensionality
2004; Royal Society of Chemistry; Issue: 6 Linguagem: Inglês
10.1039/b315067d
ISSN1477-9234
AutoresPhilippa King, Rodolphe Clérac, Christopher E. Anson, Annie K. Powell,
Tópico(s)Metal complexes synthesis and properties
ResumoA series of M(II) complexes with the ligand 3,5-pyrazoledicarboxylic acid (H3dcp) has been synthesised mainly via hydrothermal reactions and their structures have been characterised. Simple mononuclear [Ni(Hdcp)(H2O)4] (1), Na2(μ-H2O)2(H2O)8[Ni(Hdcp)2(H2O)2] (2), [M(H2dcp)2(H2O)2]·2H2O [M = Co (3), Zn (4) and Cu (5)] and dinuclear (Et3NH)2[Cu2(dcp)2(H2O)2] (9) building blocks have been isolated and subsequently linked into 1-D chains [Mn(Hdcp)(H2O)2]∞ (6), [{Mn(H2O)4}{Mn(Hdcp)2(H2O)2}·4H2O]∞ (7), [Ni2(Hdcp)2(μ-H2O)2(H2O)2]∞ (8), [{Ni(H2O)4}{Ni2(dcp)2(H2O)4}]∞ (11), or 3-D arrays [{Na2(μ-H2O)2}{Cu2(dcp)2}]∞ (10), [Cu3(dcp)2(H2O)4]∞ (12), utilising novel bridging modes of the H3dcp ligand. In the unprecedented 1-D Ni(II) chain 8, rarely reported double aqua-bridges link the Ni(II) ions to form an inter-linked double stranded chain. The magnetic properties of these compounds have been measured and reveal a variety of antiferromagnetic coupling behaviours induced by the ligand bridging modes.
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