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Synthese und Kristallstruktur von Li 2 [(Me 3 SiCH 2 ) 3 AlCH 2 Al(CH 2 SiMe 3 ) 3 ] — ein Addukt des Dilithiomethans CH 2 Li 2 ?
Author(s) -
Uhl Werner,
Layh Marcus,
Massa Werner
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911240705
Subject(s) - chemistry , dilithium , crystal structure , methyllithium , trimethylsilyl , adduct , methylene , aluminate , lithium (medication) , x ray crystallography , medicinal chemistry , crystallography , stereochemistry , organic chemistry , ion , diffraction , archaeology , cement , deprotonation , optics , history , endocrinology , medicine , physics
Synthesis and Crystal Structure of Li 2 [(Me 3 SiCH 2 ) 3 AlCH 2 Al(CH 2 SiMe 3 ) 3 ]—a Dilithiomethane Derivative? Reaction of (trimethylsilyl)methyllithium with the methylene‐bridged aluminium tetrachloride Cl 2 AlCH 2 AlCl 2 yields dilithium methylenebis[tris(trimethylsilylmethyl)aluminate] ( 2 ) as the only isolable product. All attempts for preparing the tetraalkyl analogue have been unsuccessful. The crystal structure of 2 exhibits a hexacoordinated central carbon atom with short LiC distances. Both lithium atoms and the methylene hydrogens of the AlCH 2 Al unit are almost coplanar. The discussion of the structure and properties leads to the attractive description of 2 as an adduct of tris(trimethylsilylmethyl)‐aluminium to dilithiomethane CH 2 Li 2 .