title: Beryllium Phosphine Complexes: Synthesis, Properties, and Reactivity of (PMe3)2BeCl2and (Ph2PC3H6PPh2)BeCl2.
abstract: The directed synthesis, spectroscopic properties, and reactivity of bis(trimethylphosphine) beryllium dichloride (1) and bis(diphenylphosphino)propane beryllium dichloride (2) are reported, including the crystal structure of (PMe3)2BeCl2(1). These four-coordinate beryllium compounds can be alkylated with n-butyllithium (nBuLi) to give three-coordinate (Ph2PC3H6PPh2)BenBu2(3) and (PMe3)BenBu2(4). PMe3can be removed from (PMe3)BenBu2(4) in vacuo to yield [nBu2Be]2(5). For the first time, the presence of [nBu2Be]2as a dimer in solution, which has been postulated for decades, could be observed spectroscopically. This novel, ether-free pathway provides access to beryllium dialkyl compounds that have never been in contact with oxygen-atom-containing reagents or solvents. This "freeness from oxygen" is crucial for semiconductor applications where oxygen is often unwanted and must be avoided at all costs.
authors.affiliation: Anorganische Chemie, Nachwuchsgruppe Berylliumchemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany.
authors.forename: Magnus R
authors.initials: MR
authors.lastname: Buchner
authors.affiliation: Anorganische Chemie, Nachwuchsgruppe Berylliumchemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Müller
authors.affiliation: Anorganische Chemie, Arbeitsgruppe Fluorchemie, Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032, Marburg, Germany.
authors.forename: Stefan S
authors.initials: SS
authors.lastname: Rudel
keywords: Lewis acids; Lewis bases; beryllium; coordination chemistry; phosphines