Structural Diversity in Alkali Metal Complexes of Sterically Demanding Carbazol-9-yl Ligands
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- 作者：Rhiannon S. Moorhouse ; Graeme J. Moxey ; Fabrizio Ortu ; Thomas J. Reade ; William Lewis ; Alexander J. Blake ; Deborah L. Kays
- 刊名：Inorganic Chemistry
- 出版年：2013
- 出版时间：March 4, 2013
- 年：2013
- 卷：52
- 期：5
- 页码：2678-2683
- 全文大小：292K
- 年卷期：v.52,no.5(March 4, 2013)
- ISSN：1520-510X
文摘
The solid state structures of alkali metal complexes of the 1,3,6,8-tetra-tert-butylcarbazol-9-yl (tBu4carb鈥?/sup>) 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鈥揘 distances within the ring due to the effects of 蟽- and 蟺-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路2THF), tBu4carbNa(THF)3 (2路3THF), and tBu4carbK(THF)4 (3路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.