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Pregled bibliografske jedinice broj: 711606

Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions


Pisk, Jana; Prugovečki, Biserka; Matković-Čalogović, Dubravka; Jednačak, Tomislav; Novak, Predrag; Agustin, Dominique; Vrdoljak, Višnja
Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions // RSC Advances, 4 (2014), 73; 39000-39010 doi:10.1039/C4RA08179J (međunarodna recenzija, članak, znanstveni)


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Naslov
Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions

Autori
Pisk, Jana ; Prugovečki, Biserka ; Matković-Čalogović, Dubravka ; Jednačak, Tomislav ; Novak, Predrag ; Agustin, Dominique ; Vrdoljak, Višnja

Izvornik
RSC Advances (2046-2069) 4 (2014), 73; 39000-39010

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
pyridoxal; polyoxomolybdate; Lindqvist anion; epoxidation; solvent-free;
(pyridoxal; polyoxomolybdate; Lindqvist anion; epoxidation; solvent-free)

Sažetak
Pyridoxal hydrazonato molybdenum(VI) complexes were prepared by the reaction of the corresponding hydrazone (H2L1 = pyridoxal isonicotinic acid hydrazone, H2L2 = pyridoxal benzhydrazone, H2L3 = pyridoxal 4-hydroxy benzhydrazone) and [MoO2(acac)2] under appropriate conditions. The complexes can be classified into three categories: mononuclear [MoO2(L1–3)(MeOH)], polynuclear [MoO2(L1–3)]n and hybrid organic–inorganic compounds with the Lindqvist polyoxomolybdate [MoO2(HL1–3)]2Mo6O19. A unique example of a cationic polymer assembly with Lindqvist anions is reported herein for the first time. The compounds were characterised by elemental, TG and DSC analyses and by spectroscopic (IR, UV-Vis, 1H, 13C NMR) techniques. The crystal and molecular structure of the pyridoxal benzhydrazone H2L2, three mononuclear complexes [MoO2(L1–3)(MeOH)], and the Lindqvist-containing compounds [MoO2(HL2)]2Mo6O19·2MeCN and (H4L1)Mo6O19 were determined by single crystal X-ray diffraction. All complexes were tested as (pre)catalysts for the epoxidation of cyclooctene under solvent-free conditions with the use of aqueous TBHP (TBHP = tert-butylhydroperoxyde) as an oxidant. Optimal results in terms of conversion, selectivity, TOF and TON were obtained at very low (pre)catalyst loadings (0.05% [Mo] vs. substrate). The influence of the Lindqvist anion on catalytic performance is discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekti:
119-1191342-1082 - Novi kompleksni spojevi i materijali-kemijski i biološki katalizatori (Cindrić, Marina, MZOS ) ( POIROT)
119-1191342-1083 - Interakcije i dizajn bioaktivnih molekula (Novak, Predrag, MZOS ) ( POIROT)
119-1193079-1084 - Strukturno istraživanje bioloških makromolekula metodom rentgenske difrakcije (Matković-Čalogović, Dubravka, MZOS ) ( POIROT)

Ustanove:
Prirodoslovno-matematički fakultet, Zagreb

Poveznice na cjeloviti tekst rada:

doi pubs.rsc.org

Citiraj ovu publikaciju:

Pisk, Jana; Prugovečki, Biserka; Matković-Čalogović, Dubravka; Jednačak, Tomislav; Novak, Predrag; Agustin, Dominique; Vrdoljak, Višnja
Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions // RSC Advances, 4 (2014), 73; 39000-39010 doi:10.1039/C4RA08179J (međunarodna recenzija, članak, znanstveni)
Pisk, J., Prugovečki, B., Matković-Čalogović, D., Jednačak, T., Novak, P., Agustin, D. & Vrdoljak, V. (2014) Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions. RSC Advances, 4 (73), 39000-39010 doi:10.1039/C4RA08179J.
@article{article, year = {2014}, pages = {39000-39010}, DOI = {10.1039/C4RA08179J}, keywords = {pyridoxal, polyoxomolybdate, Lindqvist anion, epoxidation, solvent-free, }, journal = {RSC Advances}, doi = {10.1039/C4RA08179J}, volume = {4}, number = {73}, issn = {2046-2069}, title = {Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions}, keyword = {pyridoxal, polyoxomolybdate, Lindqvist anion, epoxidation, solvent-free, } }
@article{article, year = {2014}, pages = {39000-39010}, DOI = {10.1039/C4RA08179J}, keywords = {pyridoxal, polyoxomolybdate, Lindqvist anion, epoxidation, solvent-free}, journal = {RSC Advances}, doi = {10.1039/C4RA08179J}, volume = {4}, number = {73}, issn = {2046-2069}, title = {Pyridoxal hydrazonato molybdenum(VI) complexes : assembly, structure and epoxidation (pre)catalyst testing under solvent-free conditions}, keyword = {pyridoxal, polyoxomolybdate, Lindqvist anion, epoxidation, solvent-free} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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