Naslov
The clusters of niobium and tantalum [M_6X_(12)(ROH)_6]X_2 (R = alkyl) as precursors for the reactions in nonaqueous solvents

Autori
Brničević, Nevenka ; Širac, Siniša ; Planinić, Pavica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts / Gunsser, W ; Reller, A. - Hamburg : Elsevier, 1996, 149-149

Skup
XIIIth International symposium on the reactivity of solids

Mjesto i datum
Hamburg, Njemačka, 08.09.1996. - 12.09.1996

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
metal clusters; cluster precursors; alcoholate complexes

Sažetak
The hexanuclear halide clusters of niobium and tantalum of the composition [M_6X_(12)(ROH)_6]X_2 with loosely bonded aliphatic alcohol molecules, are suitable starting materials for the reactions of Nb_6 and Ta_6 clusters in nonaqueous solvents. The cluster [Ta_6Cl_(12)(CH_3OH)_6]Cl_2 has been already used as the precursor in synthetic procedure of methoxo clusters M_2[Ta_6Cl_(12)(OCH_3)_6]×nCH_3OH, M = alkali metal. Now, the clusters [M_6X_(12)(C_2H_5OH)_6]X_2, M = Nb, Ta; X = Cl, Br, have been used as precursors in the reactions with nitrogen bases. Microcrystalline substances of the composition [M_6X_(12)L_6]X_2, L = NH_3, CH_3CN, C_5H_5N, represent the first N-ligated species in chemistry of Nb_6 and Ta_6 clusters. Based on analytical and spectral data all octahedral coordination sites are occupied by nitrogen base molecules. Spectral, crystallographic and magnetic properties of these new clusters are discussed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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