title: Relative Lewis basicities of six AI(ORF)4- superweak anions and the structures of LiA.
abstract: The relative Lewis basicities of six Al(ORF)4- ions, Al[OC(CH3)(CF3)2]4-, Al(OC(CF3)3]4-, Al(OCPh(CF3)2]4-, Al[OC[4-C6H4(tBu)](CF3)2]4-, Al(OC(Cy)(CF3)2]4-, and Al(OCPh2(CF3)]4-, have been determined by measuring their relative coordinating abilities towards Li+ in dichloromethane. The relative Li- Lewis basicities of the Al(ORF)4- ions are linearly related to the aqueous pKa values of the corresponding parent HORF fluoroalcohols. The Lewis basicity of Al[OCH(CF3)2]4- could not be measured because two of these anions can coordinate to one Li+ cation. The structures of LiAl[OCH(CF3)2]4 and [1-Et-3-Me-1,3-C3H3N2][Li[Al[OCH(CF3)2)4]2] were determined.
authors.affiliation: Department of Chemistry, Colorado State University, Ft. Collins 80523, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Ivanova
authors.forename: B G
authors.initials: BG
authors.lastname: Nolan
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: S M
authors.initials: SM
authors.lastname: Miller
authors.forename: O P
authors.initials: OP
authors.lastname: Anderson
authors.forename: S H
authors.initials: SH
authors.lastname: Strauss
mesh_terms: D000468:Alkalies / Q000737:chemistry*; D017607:Aluminum Compounds / Q000737:chemistry*; D000838:Anions; D018020:Lithium Compounds / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D000468:Alkalies; D017607:Aluminum Compounds; D000838:Anions; D018020:Lithium Compounds