Azomethine derivatives. Part III. Reactions between diphenylketimine and trimethylgallium, triethylgallium, and triphenylgallium

Abstract

Diphenylketimine and trimethylgallium form a crystalline adduct Ph,C:NH,GaMe, which a t 100" loses methane to form the azomethine derivative (Ph,C:N*GaMe,),.In the systems Ph,C:NH-GaR, (R = Et or Ph) the 1 :1 mixtures of the components are viscous liquids whose proton magnetic resonance (p.m.r.) spectra provide evidence of weak complex formation. Both systems lose R H readily a t 100-1 20' to form azomethine derivatives (Ph,C:N*GaR,)2.Features of the infrared, p.m.r., and mass spectra of these compounds are discussed.

1,2-Dimetalated Benzene Derivatives (1,2-C6H4MCH3)n of Group 13 (M = Al, Ga, In)

“…From Table , it follows that the 1 H and 13 C NMR chemical shifts of 3 are in good agreement with those reported for related compounds such as (C 6 H 5 ) 3 Al·THF ( 4 ), (C 6 H 5 ) 3 Ga ( 5 ), and the 9,10-dihydro-9,10-diindaanthracene derivative 6 9b(Figure ). However, some differences can be observed.…”

Aryl(dimethyl)gallium Compounds and Methyl(diphenyl)gallium: Synthesis, Structure, and Redistribution Reactions

“…The 1 H NMR spectrum of 1 measured in benzene- d 6 at room temperature revealed a singlet at δ = −0.13 ppm for the two methyl groups, a multiplet at δ = 7.27 ppm for three protons in para - and meta -positions, and a multiplet at δ = 7.62 ppm for two protons in ortho -postion of the phenyl ring. The 13 C NMR spectrum in benzene- d 6 showed expected signals at δ = −2.9 (methyl), 128.2 (C-3/5) 129.8 (C-4), 137.2 (C-2/6), and 148.2 (C-1) ppm …”

“…On the cooler region of the flask, a crystalline material deposited, consisting of triphenylgallium and 4 (∼5%) as proven by NMR spectroscopy. Triphenylgallium: 1 H NMR (benzene- d 6 ): δ 7.30 (m, meta -protons), 7.74 (m, ortho -protons) …”

DFT Modeling of Chemical Vapor Deposition of GaN from Organogallium Precursors. 2. Structures of the Oligomers and Thermodynamics of the Association Processes

“…The notion that association processes are important for Ga−N systems is further supported by experimental results. The Ga 2 N 2 rings of [R 2 GaNCR‘R‘ ‘] 2 and [Me 2 GaNRR‘] 2 compounds (R, R‘, R‘ ‘ = Me, Ph) were found in mass-spectroscopy studies to be highly stable in the gas phase. − The major fragmentation processes are the terminal Ga−C and N−C bond cleavages. It is also known that mixing TMG with NH 3 immediately leads to the TMG-NH 3 adduct, which evolves 1 mol of CH 4 accompanied by [(CH 3 ) 2 GaNH 2 ] 3 trimer formation when heated above 120 °C .…”