Structural diversity in alkali metal complexes of sterically demanding carbazol-9-yl ligands

Moorhouse, Rhiannon S., Moxey, Graeme J., Ortu, Fabrizio, Reade, Thomas J., Lewis, William, Blake, Alexander J. and Kays, Deborah L. ORCID: https://orcid.org/0000-0002-4616-6001 2013. Structural diversity in alkali metal complexes of sterically demanding carbazol-9-yl ligands. Inorganic Chemistry 52 (5) , 2678–2683. 10.1021/ic302727w

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Abstract

The solid state structures of alkali metal complexes of the 1,3,6,8-tetra-tert-butylcarbazol-9-yl (tBu4carb–) ligand are compared. Lithium complex [tBu4carbLi]2 ([1]2) is a dimer in the solid state featuring a planar LiNLiN rhomboid ring, with the differing Li–N distances within the ring due to the effects of σ- and π-interactions. Recrystallization of lithium, sodium, and potassium complexes of the 1,3,6,8-tetra-tert-butylcarbazol-9-yl ligand from THF leads to the formation of tBu4carbLi(THF)2 (1·2THF), tBu4carbNa(THF)3 (2·3THF), and tBu4carbK(THF)4 (3·4THF), respectively, in the solid state. For these THF adducts, on proceeding from lithium to sodium to potassium there is an increase in hapticity of the binding of the carbazol-9-yl ligands to the metal cations, mirroring the increasing ionic bonding character in these compounds.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	American Chemical Society
ISSN:	0020-1669
Last Modified:	10 Jul 2024 10:16
URI:	https://orca.cardiff.ac.uk/id/eprint/170320

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