Synthesis and structural characterization of some binuclear acetylacetone and Schiff’s base complexes containing aluminum(III) atoms in different coordination states

Abstract

Some Schiff ' s base complexes of aluminum(III) of the type (CH 3 COCHCOCH 3 ) 2 Al( μ -OPr i ) 2 AlL n (OPr i ) 2-n [where LH=OHC(R)=CHC(R ′ )=NC 6 H 5 ; R=R ′ =CH 3 ,C 6 H 5 ; R=CH 3 , R ′ =C 6 H 5 ; LH=C 6 H 4 (OH)CH=NC 6 H 5 and n = 1 or 2] were prepared and characterized by various spectroscopic techniques. The molecular weight measurements indicated their binuclear nature. The 27 Al nuclear magnetic resonance spectra of representative compounds [(CH 3 COCHCOCH 3 ) 2 Al( μ -OPr i ) 2 Al { OC(C 6 H 5 )=CH C(C 6 H 5 )=NC 6 H 5 } (OPri)] [3] and [(CH 3 COCHCOCH 3 ) 2 Al( μ -OPr i ) 2 Al { OC(CH 3 )=CH C(CH 3 )=NC 6 H 5 } 2 ] [6] suggest the presence of aluminum(III) atoms in different coordination states.

Sol–gel synthesis of highly pure α-Al2O3 nano-rods from a new class of precursors of salicylaldehyde-modified aluminum(iii) isopropoxide. Crystal and molecular structure of [Al(OC6H4CHO)3]

“…of tetra-coordination around aluminum(III) atoms [39][40][41][42] in solution. The 27 Al NMR spectrum of ( 2 (10) , indicating that the aluminum atom in the complex occurs in a distorted octahedral environment.…”