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Beryllium Phosphine Complexes: Synthesis, Properties, and Reactivity of (PMe 3 ) 2 BeCl 2 and (Ph 2 PC 3 H 6 PPh 2 )BeCl 2
Author(s) -
Buchner Magnus R.,
Müller Matthias,
Rudel Stefan S.
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201610956
Subject(s) - phosphine , reactivity (psychology) , beryllium , chemistry , crystallography , organic chemistry , catalysis , medicine , alternative medicine , pathology
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 (PMe 3 ) 2 BeCl 2 ( 1 ). These four‐coordinate beryllium compounds can be alkylated with n‐butyllithium ( n BuLi) to give three‐coordinate (Ph 2 PC 3 H 6 PPh 2 )Be n Bu 2 ( 3 ) and (PMe 3 )Be n Bu 2 ( 4 ). PMe 3 can be removed from (PMe 3 )Be n Bu 2 ( 4 ) in vacuo to yield [ n Bu 2 Be] 2 ( 5 ). For the first time, the presence of [ n Bu 2 Be] 2 as 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.