Reactivity of (Me3Al)2 with selected aminoarsines and secondary amines

Reactivity of R2AlH (R = Me, Bui) with Selected Aminoarsines and Secondary Amines

“…Herein we report an NMR investigation on the reactivity of a series of monoaminodimethylarsines, Me 2 AsR [R = NMe 2 , NPr n 2 , NPr i 2 , NBu n 2 , NBu i 2 , NC 4 H 8 , NC 5 H 10 , NC 6 H 12 , and N(C 2 H 4 ) 2 NMe], toward Me 2 AlH and Bu i 2 AlH and note the influence that a variation in the steric bulk of R and the aluminum alkyl moiety has on overall reactivity and aminoalane dimer formation. For the Me 2 AlH/Me 2 AsR system, the resultant [Me 2 AlR] 2 products are compared with previously characterized samples from the reactions of Me 3 Al with the same aminoarsine series. , Because only [Bu i 2 AlNMe 2 ] 2 and [Bu i 2 AlNC 5 H 10 ] 2 have been previously reported, we synthesized seven [Bu i 2 AlR] 2 derivatives [R = NMe 2 , NPr n 2 ,NBu n 2 , NC 4 H 8 , NC 5 H 10 , NC 6 H 12 , and N(C 2 H 4 ) 2 NMe] by the reaction of Bu i 2 AlH with the corresponding secondary amines and one, [Bu i 2 AlNBu i 2 ] 2 , by the reaction of Bu i 2 AlCl with LiNBu i 2 . Also reported is the synthesis of the trimeric [Bu i 2 AlAsMe 2 ] 3 , which is an observed reaction product in the Me 2 AsNPr i 2 and Me 2 AsNBu i 2 systems.…”

Synthesis and crystal structure of dimeric dialkylaluminium μ-dialkylamido compounds

“…Such decomposition observed for (Me 2 AlNPh 2 ) 2 was attributed to light sensitivity of this compound. 24 However we observed that decomposition occurred even in the dark after being exposed to a flow of nitrogen or even in the glove-box nitrogen atmosphere. This suggests that the decomposition process, once started, continues in the absence of the factor which triggered it.…”

“…In another work involving similar amides the infrared peaks were not assigned, possibly due to these difficulties. 24 Despite these difficulties, 'assignments' based on the literature values 25,26 are given in Table 2. The approximate nature of the assignments must be stressed, however, because the force constants and reduced masses that characterize each bond will be very similar, producing a degree of coupling between Al᎐C and Al᎐N vibrations and hence a range of molecular vibrations.…”

Synthesis and Molecular Structure of an Orthometalated Aminogallane, [MeGaN(CH2C6H4)(CH2Ph)]2

“…As an extension of our work on the thermolysis of Me 3 Al with a homologous series of secondary amines, 16 the thermolysis of Me 3 Ga with these amines was investigated to determine the efficacy of this method for the formation of dimeric aminogallanes. 17 Although peaks associated with the formation of [Me 2 GaN(CH 2 -Ph) 2 ] 2 are initially observed in the NMR spectra of the thermolyzed Me 3 Ga/HN(CH 2 Ph) 2 reaction mixture, peaks assignable to three intermediates that ultimately lead to [MeGaN(CH 2 C 6 H 4 )(CH 2 Ph)] 2 (1) are also observed.…”