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https://doi.org/10.5562/cca4086

Synthesis and Structure of Malato Molybdenum(VI) Complexes: ∆-[Co(en)3][MoO3(L-mal)] × H2O and ∆-[Co(en)3]n[Mo4O11(L-mal)2(H2O)2Na]n × 4 n H2O

Dino Kuzman ; Faculty of Science, University of Zagreb, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia
Vladimir Damjanović ; School of Medicine, University of Zagreb, Department of Chemistry and Biochemistry, Šalata 3, 10000 Zagreb, Croatia
Marina Cindrić ; Faculty of Science, University of Zagreb, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia *

* Dopisni autor.

Prilozi: cca4086-supplement.pdf

Sažetak

Two ∆-[Co(en)3]3+ salts with oxomolybdate anions coordinated with malato ligand, ∆-[Co(en)3][MoO3(L-mal)] × H2O (1) and
∆-[Co(en)3]n[Mo4O11(L-mal)2(H2O)2Na]n × 4 n H2O (2) were obtained as products of the reaction between tris(ethylenediamine)cobalt(III) chloride and sodium molybdate in the presence of L-malic acid. In the reactions of Na2MoO4 and ∆-[Co(en)3]Cl3 with formic, maleic or adipic acid, respectively, as the only product heptamolybdate, ∆-[Co(en)3]2(H3O)[Mo7O24]Cl × 9 H2O (3) was isolated. All the reactions were conducted by using different synthetic approaches, namely solution-based methods performed at room temperature, under reflux or hydrothermally at
110 °C, along with mechanochemically accelerated (hand grinding or liquid-assisted ball milling) vapour-assisted aging. The isolation of these different oxomolybdate species, depending on the nature of applied dicarboxylic acid, revealed the role of used dicarboxylic acids not solely as ligands, but also as structure-directing agents in the polyoxoanion self-assembly processes. All the products were characterized in the solid state by infrared spectroscopy, thermogravimetric and elemental analysis as well as single-crystal and powder X-ray diffraction.

Ključne riječi

characterization; single crystal X-ray diffraction method; mechanochemical synthesis; vapour-assisted aging; solution-based syntheses; polyoxomolybdates

Hrčak ID:

323372

URI

https://hrcak.srce.hr/323372

Datum izdavanja:

10.12.2024.

Posjeta: 0 *