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Synthesis, Structure and Chemical Vapour Deposition Studies on the Group 13 Complexes [Me 2 M{tfacnac}] [M = Al, Ga, In; Htfacnac = F 3 CC(OH)CHC(CH 3 )NCH 2 CH 2 OCH 3 ]
Author(s) -
Cosham Samuel D.,
Hamilton Jeff A.,
Hill Michael S.,
Johnson Andrew L.,
Molloy Kieran C.
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201600023
Subject(s) - chemistry , metal , ligand (biochemistry) , thermogravimetric analysis , crystallography , infrared spectroscopy , monomer , chemical vapor deposition , reagent , crystal structure , inorganic chemistry , stereochemistry , organic chemistry , biochemistry , receptor , polymer
A family of group 13 metal dimethyl complexes of the general formula [Me 2 M{MeC(O)CHC(NCH 2 CH 2 OMe)CF 3 }] [M = Al ( 2 ), Ga ( 3 ) or In ( 4 )] was synthesised by reaction of the isolated free ligand 1 with the corresponding trimethyl metal reagents. The isolated complexes 2–4 were characterised by elemental analysis and NMR spectroscopy, and the molecular structures of the complexes were determined by single‐crystal X‐ray diffraction, which revealed them to be monomeric five‐coordinate complexes with coordination of the pendent ether‐bearing lariat in the solid state. Thermogravimetric analysis showed complexes 2 – 4 all to have residual masses at 200 °C of 2.4 % or less, well below the value for the respective metal oxides, and vapour pressure measurements showed the indium complex 4 to be an order of magnitude less volatile (0.09 Torr at 80 °C) than the Al ( 2 ) and Ga ( 3 ) analogues, despite their being isoleptic systems. Complexes 2 – 4 were investigated for their utility in the low‐pressure metal organic chemical vapour deposition of the respective metal oxides in the absence of additional oxidant at 400 °C on silicon substrates.