Skip to main content

Research Repository

Advanced Search

Tuning coordination in s-block carbazol-9-Yl complexes

Ortu, Fabrizio; Moxey, Graeme J.; Blake, Alexander J.; Lewis, William; Kays, Deborah L.

Tuning coordination in s-block carbazol-9-Yl complexes Thumbnail


Fabrizio Ortu

Graeme J. Moxey

Alexander J. Blake

William Lewis

Professor of Inorganic Chemistry


© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 1,3,6,8-Tetra-tert-butylcarbazol-9-yl and 1,8-diaryl-3,6-di(tert-butyl)carbazol-9-yl ligands have been utilized in the synthesis of potassium and magnesium complexes. The potassium complexes (1,3,6,8-tBu4carb)K(THF)4 (1; carb=C12H4N), [(1,8-Xyl2-3,6-tBu2carb)K(THF)]2 (2; Xyl=3,5-Me2C6H3) and (1,8-Mes2-3,6-tBu2carb)K(THF)2 (3; Mes=2,4,6-Me3C6H2) were reacted with MgI2 to give the Hauser bases 1,3,6,8-tBu4carbMgI(THF)2 (4) and 1,8-Ar2-3,6-tBu2carbMgI(THF) (Ar=Xyl 5, Ar=Mes 6). Structural investigations of the potassium and magnesium derivatives highlight significant differences in the coordination motifs, which depend on the nature of the 1- and 8-substituents: 1,8-di(tert-butyl)-substituted ligands gave π-type compounds (1 and 4), in which the carbazolyl ligand acts as a multi-hapto donor, with the metal cations positioned below the coordination plane in a half-sandwich conformation, whereas the use of 1,8-diaryl substituted ligands gave σ-type complexes (2 and 6). Space-filling diagrams and percent buried volume calculations indicated that aryl-substituted carbazolyl ligands offer a steric cleft better suited to stabilization of low-coordinate magnesium complexes.

Journal Article Type Article
Online Publication Date Mar 17, 2015
Publication Date Apr 27, 2015
Deposit Date Oct 28, 2015
Publicly Available Date Oct 28, 2015
Journal Chemistry - A European Journal
Print ISSN 0947-6539
Electronic ISSN 1521-3765
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 21
Issue 18
Pages 6949-6956
Public URL
Publisher URL


You might also like

Downloadable Citations