Coordination polymers and molecular complexes of group 13 metal halides with bis-pyridylethane: comparison with rigid N-containing ligands. Issue 47 (15th November 2022)

• Record Type: Journal Article
• Authors: Gugin, Nikita Y.; Virovets, Alexander V.; Peresypkina, Eugenia; Davydova, Elena I.; Timoshkin, Alexey Y.
• Is Part Of: CrystEngComm. Volume 24:Issue 47(2022)
• Page Start: 8266
• Page End: 8278
• Publication Date: 2022-11-15
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d2ce01063a
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Cationic 1D coordination polymers based on complexes of aluminium and gallium trihalides with 1, 2-bis(4-pyridyl)ethane featuring double bridged bpa in gauche conformation. Abstract : A systematic structural study of novel complexes formed by aluminium and gallium trihalides with 1, 2-bis(4-pyridyl)ethane (bpa) is performed. The complexes were synthesized using a solvent-free melt reaction approach and crystallized by sublimation in vacuum. Ionic coordination polymers (CPs) [MCl2 (bpa)2 ] + [MCl4 ] −, M = Al (1 ) or Ga (2 ), exhibit isostructural one-dimensional networks. Ionic CP 3 [AlBr2 (bpa)2 ] + Br − has a 1 : 2 composition and possesses a cationic part analogous to 1 and 2, featuring a modulated structure, in which the entire polymer chain and/or the positions of the bromido ligands are displaced according to a harmonic law. In the ionic CP [Ga2 Br4 (bpa)5 ] 2+ [GaBr4 ]2 − ·bpa (4 ) featuring a 2 : 3 composition, the [Ga2 Br4 (bpa)5 ] 2+ cation forms a 2D polymer framework, in which {GaBr2 } + nodes are linked by the μ-bpa spacers forming 1D chains that are further interconnected by μ-bpa ligands of every second metal center. In the case of the 2 : 1 ratio, irrespective of the Lewis acid, molecular complexes [(MX3 )2 (bpa)] (MX3 = AlCl3 (5 ), AlBr3 (6 ), GaCl3 (7 ), and GaBr3 (8 )) were obtained. Solid-state structures of complexes 1–8 were determined for the first time.