title: Structural elucidation of homometallic anthracenolates synthesised via deprotonative metallation of anthrone.
abstract: Five novel neutral homometallic complexes which contain the anthracen-9-olate anion have been prepared and characterised by treating anthrone with an organometallic base to induce aromatisation. Three of these complexes [(donor)·M(OC(14)H(9))](2) (2-4) are dimeric and contain sodium, lithium and potassium respectively. For 2 and 3 the donor is N,N,N',N'-tetramethylethylenediamine (TMEDA) whilst for 4 it is N,N,N',N'',N''-pentamethyldiethylenetriamine (PMDETA). When bimetallic reagents such as [(TMEDA)·Na(μ-(t)Bu)(μ-TMP)Zn((t)Bu)] are employed, only the alkali-metal-containing species is isolated (e.g., 2 in this case). Providing a contrast, complexes 5 [(TMEDA)·Mg(OC(14)H(9))(n)Bu] and 6 [(TMEDA)·Zn(OC(14)H(9))Et] are monomeric. The alkali metal complexes were prepared by reacting anthrone with one molar equivalent of either n-butylsodium, n-butyllithium or (trimethylsilyl)methylpotassium in the presence of the required donor solvent. For 5 and 6, equimolar quantities of di-n-butylmagnesium and diethylzinc, respectively, were reacted with anthrone in the presence of TMEDA. The solid-state structures and the arene solution structures of 2-6 have been determined by X-ray crystallography and NMR spectroscopy respectively.
authors.affiliation: School of Chemistry, Newcastle University, Newcastle upon Tyne NE1 7RU, UK.
authors.forename: William
authors.initials: W
authors.lastname: Clegg
authors.forename: Ben J
authors.initials: BJ
authors.lastname: Fleming
authors.forename: Pablo
authors.initials: P
authors.lastname: García-Álvarez
authors.forename: Lorna M
authors.initials: LM
authors.lastname: Hogg
authors.forename: Alan R
authors.initials: AR
authors.lastname: Kennedy
authors.forename: Jan
authors.initials: J
authors.lastname: Klett
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Martínez-Martínez
authors.forename: Robert E
authors.initials: RE
authors.lastname: Mulvey
authors.forename: Luca
authors.initials: L
authors.lastname: Russo
authors.forename: Charles T
authors.initials: CT
authors.lastname: O'Hara
mesh_terms: D000873:Anthracenes / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011522:Protons; D015032:Zinc / Q000737:chemistry*; D000095322:Anthrones
chemical_list: D000873:Anthracenes; D009942:Organometallic Compounds; D011522:Protons; D015032:Zinc; C004522:anthrone; D000095322:Anthrones