Discrete and extended structures in coordination chemistry based on tridentate Schiff ligands and cyanobisphosphonate ligands

Abstract : This work develops new strategies in metallosupramolecular chemistry, based upon (1) new copper(II) precursors with easily accessible basal positions, that favor stronger exchange interactions, and flexible coordination spheres as a prerequisite for magnetic and photomagnetic processes; (2) cyano bis-phosphonate ligands for the construction of extended structure using building-block strategies; (3) tris-phosphonato triazine ligands together with coordination heteropolymetallic complexes with the paramagnetic centers Cu(II), Mn(II) and Co(II) as M(hfac)2 (hfac = hexafluoro-acetylacetonate) fragments. Here we report the results obtained by employing [Co(CN)6]3-[Cr(CN)6]3-,[Mo(CN)8]4-, [W(CN)8]4- as building-blocks and copper(II) precursors (synthesized by employing tridentate Schiff-base ligands allowing the access of the connectors to the basal position of the copper ions and thus providing to the copper ion a more flexible coordination sphere). Another series of homometallic systems was synthesized using the ligand 1-Cyanomethyl-bis(5,5-dimethyl-2-oxo-1,3,2-dioxaphosphorinane). The extended structures were built by the reaction of this units with a second metallic unit.
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Chemical Sciences. Université d'Angers; Université de Bucarest, 2009. Romanian


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Submitted on : Monday, May 17, 2010 - 3:48:50 PM
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Catalin Maxim. Discrete and extended structures in coordination chemistry based on tridentate Schiff ligands and cyanobisphosphonate ligands. Chemical Sciences. Université d'Angers; Université de Bucarest, 2009. Romanian. <tel-00483982>

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