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Komplexe der Alkalimetalltetraphenylborate mit makrocyclischen Kronenethern
Author(s) -
Wilde Björn,
Jaenschke Anja,
Olbrich Falk
Publication year - 2008
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700351
Subject(s) - tetrahydrofuran , chemistry , alkali metal , molecule , infrared spectroscopy , crystal structure , crystallography , metal , 18 crown 6 , solvent , stereochemistry , organic chemistry
Complexes of the Alkali Metal Tetraphenylborates with Macrocyclic Crown Ethers Alkali metal tetraphenylborates, MB(C 6 H 5 ) 4 (M = Li to Cs), react in tetrahydrofuran with macrocyclic crown ethers to give complexes of the general formula MB(C 6 H 5 ) 4 (crown) m (THF) n . Suitable single crystals for X‐ray structure analysis were grown from a solvent mixture of tetrahydrofuran and n ‐hexane. The salt like complexes [Li(12‐crown‐4)(thf)][B(C 6 H 5 ) 4 ] ( 1 ), [Na(15‐crown‐5)(thf)][B(C 6 H 5 ) 4 ] ( 2 ), and [Cs(18‐crown‐6) 2 ][B(C 6 H 5 ) 4 ] · THF ( 6 ), the mononuclear molecular complexes [KB(C 6 H 5 ) 4 (18‐crown‐6)(thf)] ( 3 ), [RbB(C 6 H 5 ) 4 (18‐crown‐6)] ( 4 ), and [CsB(C 6 H 5 ) 4 (18‐crown‐6)] · THF ( 5 ), and the compound [CsB(C 6 H 5 ) 4 (18‐crown‐6)] 2 [Cs(18‐crown‐6) 2 ][B(C 6 H 5 ) 4 ] ( 7 ), which contains a binuclear molecule ([CsB(C 6 H 5 ) 4 (18‐crown‐6)] 2 ) beside a [Cs(18‐crown‐6) 2 ] + cation and a [B(C 6 H 5 ) 4 ] − anion, are described. All compounds are charactarized by infrared spectra, elemental analysis, NMR‐spectroscopy, and X‐ray single crystal structure analysis.