Darstellung, Struktur und einige Reaktionen von Tris(dimethylamino)gallan / Preparation, Structure and Some Reactions of Trisdimethylaminogallane

Abstract

The aminogallanes Ga[N(CH3)2]3 (1), ClGa[N(CH3)2]2 (2) and Ga[N(Si(CH3)3)2]3 (3) are prepared by reacting GaCl3 with LiN(CH3)2 and NaN[Si(CH3)3]2, respectively. Excess LiN(CH3)2 leads to LiGa[N(CH3)4] which reacts with GaCl3 to yield 1. CS2 inserts into all Ga—N bonds of 1 yielding monomeric Ga[S2CN(CH3)3)2]3 (4).1 dimerizes via dimethylamino bridges. In contrast, 1H. NMR spectra indicate group exchange for dimeric 2. Assoziation of 3 is prevented due to steric hindrance. The gallium atom in 4 exhibits hexacoordination, and there is evidence for the binding of the (CH3)2NCS2 groups through S atoms only.

Monodisperse Colloidal Gallium Nanoparticles: Synthesis, Low Temperature Crystallization, Surface Plasmon Resonance and Li-Ion Storage

“…Ga 2 (NMe 2 ) 6 is commercially available or can be easily synthesized from GaCl 3 using known method. 11 We first attempted thermal decomposition in oleylamine (primary amine), a very common high-boiling solvent and surfactant, and observed no decomposition up to at least 300 °C. We therefore eliminated primary amines from the system and used ODE as a high-boiling non-coordinating solvent.…”

“…This compound was synthesized according to the original protocol of Nöth and Konrad. 11 Briefly, LiNMe 2 (5.103 g, 0.1 mol) was dissolved in hexane (100 mL) and Et 2 O (250 mL). This slurry was cooled to 0 °C with an ice–water bath and stirred for 1 h, followed by the dropwise (∼30 min) addition of GaCl 3 (5.8 g, 33 mmol) dissolved in Et 2 O (30 mL).…”

Gallium Imide, {Ga(NH)3/2}n, a New Polymeric Precursor for Gallium Nitride Powders

“…A successful preparation of the precursor with the formula corresponding to gallium imide, {Ga(NH) 3/2 } n ( 1 ), was accomplished by reactions of [Ga(NMe 2 ) 3 ] 2 ( 2 ) with gaseous NH 3 or liquid NH 3 . The estimated quantity of the evolved HNMe 2 indicated a very efficient transamination of 2 towards an imide type of product and only residual −NMe 2 groups remained in the solid.…”

Novel Composite Nitride Nanoceramics from Reaction-Mixed Nanocrystalline Powders in the System Aluminum Nitride AlN/Gallium Nitride GaN/Titanium Nitride TiN (Al:Ga:Ti = 1:1:1)

“…Samples of {Al[N(CH 3 ) 2 ] 3 } 2 [ 15 ], 3.50 g (11.0 mmol of dimer), {Ga[N(CH 3 ) 2 ] 3 } 2 [ 16 ], 4.45 g (11.0 mmol of dimer), and Ti[N(CH 3 ) 2 ] 4 [ 17 ], 4.93 g (22.0 mmol of monomer) were synthesized according to the published procedures, dissolved together in 60 mL of dry hexane, and refluxed under an argon flow for 4 hrs. This was equivalent to at least 50% bimetallic dimer {Al/Ga[N(CH 3 ) 2 ] 3 } 2 , Al:Ga = 1:1 formation in the relevant binary system [ 12 ].…”