Synthesis of cationic lanthanoid tetraphenylborate crown ether complexes
Evans, David J., Guo, Zhifang, Deacon, Glen B., and Junk, Peter C. (2024) Synthesis of cationic lanthanoid tetraphenylborate crown ether complexes. Journal of Organometallic Chemistry, 1013. 123486.
|
PDF (Published Version)
- Published Version
Available under License Creative Commons Attribution. Download (2MB) | Preview |
Abstract
The efficacy of Me3NHBPh4 as a protolytic agent in the generation of reactive lanthanoid cations has been further explored. Reaction of [Nd(BH4)3(thf)4] with Me3NHBPh4 in a 1:3 mole ratio, and dibenzo-18-crown-6 (DB18C6) in thf did not yield [Nd(thf)n][BPh4]3, but [Nd(BH4)2(DB18C6)][BPh4]⋅2THF (1), a complex primed for further functionalisation, was isolated. The structure has an eight coordinate Nd atom with two trans tridentate BH4− ligands. Redox transmetallation/protolysis (RTP) reactions between Yb metal, PhHgC6F5, and Me3NHBPh4 in the presence of 18-crown-6 (18C6) or DB18C6 in MeCN or in thf followed by work up with MeCN yields [Yb(CE)(MeCN)3][BPh4]2⋅nMeCN (CE = 18C6, n = 0 (2), and DB18C6 n = 3 (3)), the structures of which have nine coordinate Yb atoms. Two pairs of MeCN ligands are transoid, whereas the third pair have a small cis N[sbnd]Yb[sbnd]N angle. In the absence of a crown ether ligand, the RTP reaction in MeCN yields the known [Yb(MeCN)8] [BPh4]2.
Item ID: | 83086 |
---|---|
Item Type: | Article (Research - C1) |
ISSN: | 1872-8651 |
Keywords: | Crown ethers,Lanthanoids,Non-coordinating anions,Synthesis,X-ray structures |
Copyright Information: | © 2024 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Funders: | Australian Research Council (ARC) |
Projects and Grants: | ARC DP230100112 |
Date Deposited: | 11 Jul 2024 03:57 |
Downloads: |
Total: 16 Last 12 Months: 11 |
More Statistics |