Abstract
Reactions of gallium isopropoxide with monofunctional bidentate Schiff bases, O-HOC 6H 4C(HC 3):NR and 2-HOC 10H 6CH:NR' (R = n-C 4H 9 or C 6H 5, R′ = C 2H 5 or C 6H 5), containing the donor system N-OH, have been investigated and found to yield complexes of the type, Ga(Opr i) 2(SB), Ga(OPr i(SB) 2 and Ga(SB) 3 (SB − = the anion of the Schiff base SBH). The resulting complexes have been obtained in high yield and in a state of sufficient purity. The presence of tetra-, penta- and hexacoordinated gallium atoms in the diisopropoxy mono-Schiff base, monoisopropoxy bis-Schiff base and tris-Schiff base derivatives, respectively, is probably indicated by their monomeric nature. The ν(Ga-O) frequencies are observed in the region 675-620 cm −1, whereas ν(C = N) frequencies remain almost unchanged on complex formation.
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