| Abstract
| - Herein are described the synthesis and characterization of thecomplexes of formula LAlR (where R = Cl and L= Salen (1), SalenCl (2), Acen (3)and where R = Me and L = Salen (4), SalenCl(5), Acen (6); Salen =N,N‘-ethylenebis((2-hydroxyphenyl)methylimine),SalenCl =N,N‘-ethylenebis((2-hydroxy-5-chlorophenyl)methylimine), Acen =N,N‘-ethylenebis((2-hydroxyphenyl)-1-ethylimine)).The LAlCl derivatives dissolve in waterand MeOH to yield the cationic complexes[LAl(H2O)2]+Cl-(L = Salen (7), SalenCl (8), Acen(9)) and[LAl(MeOH)2]+Cl- (L =Salen (10), SalenCl (11), Acen (12)),respectively. An alternative preparation of thecationic species involves the reaction of the LAlCl derivative withNaBPh4. This leads to complexes offormula[LAl(MeOH)2]+BPh4-(L = Salen (13), SalenCl (14), Acen(15)). Complexes 4−6 can bereacted with eitherMeOH or 4-chloro-3,5-dimethylphenol (Ph‘) to form complexes of generalformula LAlOR (R = Me, L = Salen(16), SalenCl (17), Acen (18); R =Ph‘, L = Salen (19), SalenCl (20), Acen(21)). All of the compounds werecharacterized by IR, melting points, elemental analyses, and, whensoluble, NMR. Additionally, the crystalstructures of 7, 13, 15, and18 were obtained.
- Sciffbase−AlCl complexes can be used as precursors to new cationicaluminum derivatives. These cations are of general formula[LAl(solv)2]+X-.Varying the type of ligand, solvent, and counteranion leads to awide range of readily available complexes. In this report,combinations involving L = Salen, SalenCl, and Acen, solv =H2O and MeOH, and X = Cl and BPh4 will bedescribed. A structurally characterized example,[SalenAl(H2O)2]+Cl-(shown), features the central Al atom coordinated axially by the twowaters and equatorially by theligand.
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