Alumoxane Hydride and Aluminum Chalcogenide Hydride Compounds with Pyrazolato Ligands

Abstract

Two five‐coordinate Al atoms are present in the planar Al2O2 core in 1, which was prepared from an aluminum dihydride and dioxane; unusually short Al−O bonds are also observed. The aluminum dihydride starting material reacts with Group 16 elements (S, Se, and Te) to provide further chalcogen‐bridged aluminum hydrides.

Alkynyl aluminium compounds: bonding modes and structuresDedicated to Professor George M. Sheldrick on the occasion of his 60th birthday.

“…In comparison with the analogous R 3 Al (R = alkyl group), in which only the first alkyl group is readily substituted, 22 aluminium hydrides, regardless of substituents, have shown excellent reactivity and are ideal starting materials for preparing some unique compounds which were difficult to synthesize by other routes. 23,24 Scheme 4 Facile synthesis of compound 6. Fig.…”

Stereoselective Synthesis of α‐ and β‐Glycofuranosyl Amides by Traceless Ligation of Glycofuranosyl Azides

“…A selenium–aluminium compound, dimethylaluminium methaneselenolate ( 1 ), was first synthesised in 19601 and later used as an acyl transfer reagent 2,3. Although selenium can form a moderately stable complex with aluminium,4,5 few reports in the literature have described the function of dialkylaluminium selenolate in organic syntheses 2. Kozikowski and Ames2,3 developed 1 as a reactant for the production of various methyl selenol esters.…”

A Bulky Chelating Diamidoaluminum Monohydride − Synthesis, Structure and Reactions with Me3SnF and Heavy Group 16 Elements

“…Raston et al4 have investigated the reaction of the trimethylamine adduct of alane Me 3 N·AlH 3 with chalcogen or organochalcogenides. Power et al5 have reported one example of the reaction of an aluminum dihydride with an organochalcogenide and our group has discussed the reaction of a series of aluminum dihydrides with chalcogen,3,6 where the isolation and structural characterization of some novel compounds {such as LAl(SeH) 2 , LAl(SeH)Se(SeH)AlL,3 LAl(SH) 2 6a [L = N(Ar)C(Me)CHC(Me)N(Ar), Ar = 2,6‐ i Pr 2 C 6 H 3 ); (RAlE) 2 (R = 2,4,6‐ t Bu 3 C 6 H 2 , E = S;5 R = N(SiMe 3 )C(Ph)C(SiMe 3 ) 2 ,6b 2,6‐(Et 2 NCH 2 ) 2 C 6 H 3 , 2‐Et 2 NCH 2 ‐6‐MeC 6 H 3 ;6c E = Se, Te], trans ‐[{Me 3 N(H)Al(μ‐E)} 2 ] (E = Se, Te),4b trans ‐[{Me 3 N(PhTe)Al(μ‐Se)} 2 ];4c [(η 1 ‐3,5‐ t Bu 2 pz(μ‐Al)H] 2 E (E = S, Se, Te);6d Me 3 NAl(ER) 3 (E = Se, R = Et, Ph, CH 2 Ph; E = Te, R = Ph)4a and Al 4 Se 5 (H) 2 (NMe 3 ) 4 4c} showed a rich chemistry. Although further reaction of the dimeric chalcogenidoalane, trans ‐[{Me 3 N(H)Al(μ‐E)} 2 ] (E = Se, Te) with chalcogen or organochalcogenides has been investigated,4b studies of the reaction of bulky, monomeric aluminum monohydrides with chalcogens, which might generate the corresponding monomeric Al‐EH moieties, have not been reported so far.…”