Molybdenum complexes with formic acid hydrazide derivatives

Abstract

U okviru ovog diplomskog rada pripravljena su dva hidrazonska liganda, H2L1 i H2L2, derivati hidrazida mravlje kiseline i 2-hidroksibenzaldehida, odnosno 2-hidroksi-5-nitrobenzaldehida. Reakcijama [MoO2(acac)2] i odgovarajućeg hidrazonskog liganda, u množinskom omjeru 1 : 1, u odgovarajućem otapalu, pripravljeni su kompleksni spojevi molibdena(VI). Mononuklearni kompleksni spojevi, [MoO2(L1)(MeOH)] i [MoO2(L2)(MeOH)], sintetizirani su iz metanola, uz dodatak piridina. Reakcijama u acetonitrilu sintetizirani su mononuklearni kompleksni spoj, [MoO2(L2)(H2O)]·MeCN te polinuklearni kompleksni spojevi, [MoO2(L1)]n i [MoO2(L2)]n. Hidrazonski ligandi i kompleksni spojevi karakterizirani su i analizirani razlikovnom pretražnom kalorimetrijom, infracrvenom spektroskopijom te termogravimetrijskom analizom. Difrakcijom rendgenskog zračenja na jediničnom kristalu određene su molekulske i kristalne strukture liganda H2L1 te kompleksnih spojeva [MoO2(L2)(MeOH)] i [MoO2(L2)(H2O)]·MeCN.As part of this diploma thesis, two hydrazone ligands, (H2L1) and (H2L2), derivatives of formic acid hydrazide and 2-hydroxybenzaldehyde or 2-hydroxy-5-nitrobenzaldehyde, were prepared. By reactions of [MoO2(acac)2] and corresponding hydrazone ligand, in 1 : 1 molar ratio, from corresponding solvent, molybdenum(VI) complex compounds were synthesized. Mononuclear complexes, [MoO2(L1)(MeOH)] and [MoO2(L2)(MeOH)] were synthesized from methanol, with pyridine. In reactions with acetonitrile one mononuclear complex compound, [MoO2(L1)(H2O)]·MeCN and two polynuclear complexes, [MoO2(L1)]n and [MoO2(L2)]n, were synthesized. Hydrazone ligands and complexes were characterized and analyzed by differential scanning calorimetry, infrared spectroscopy and thermogravimetric analysis. Molecular and crystal structures of the H2L1ligand and of [MoO2(L2)(MeOH)] and [MoO2(L2)(H2O)]·MeCN complexes were determined by the single crystal X-ray diffraction

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Last time updated on 10/03/2023

This paper was published in Croatian Digital Thesis Repository.

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