Diverse multinuclear alkali metallated (Li, Na, K, Rb, Cs) family of the 1,3,5‐tris‐2‐aminopyridyl‐2,4,6‐triethylbenzene framework

Lynch, Jennifer R. and Navarro, Marta and Kennedy, Alan R. and Robertson, Stuart D. and Mulvey, Robert E. and Hernán‐Gómez, Alberto (2024) Diverse multinuclear alkali metallated (Li, Na, K, Rb, Cs) family of the 1,3,5‐tris‐2‐aminopyridyl‐2,4,6‐triethylbenzene framework. Chemistry - A European Journal. e202403544. ISSN 1521-3765 (https://doi.org/10.1002/chem.202403544)

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Abstract

Literature on Group One organoelement chemistry is dominated by lithium, though sodium and potassium also feature prominently, whereas rubidium and caesium are rarely mentioned. With recent breakthroughs hinting that organoelement compounds of these two heavier metals can perform better than their lighter congeners in particular applications, important advantages could be missed unless complete sets of alkali metals are included in studies. Here, we report the synthesis and characterisation of a complete set of multi‐alkali‐metallated molecular compounds of the 1,3,5‐tris[(4,6‐dimethylpyridin‐2‐yl)aminomethyl]‐2,4,6‐triethylbenzene framework. Made by deprotonating the framework N−H bonds by a suitable base, the set comprises six THF‐solvated compounds, four of which are homometallic, either containing Li in a trinuclear structure or Na, K, and Rb in hexanuclear structures. Since deprotonation was incomplete with Cs, its homometallic compound is tetranuclear containing two un‐metallated N−H bonds. A heterobimetallic trilithium‐tricaesium hexanuclear compound was also obtained by using a bimetallic Li−Cs base for deprotonation. Such alkali‐metallated frameworks are often precursors to other multimetallic frameworks with unique properties across different fields of science.

ORCID iDs

Kennedy, Alan R. ORCID: https://orcid.org/0000-0003-3652-6015

Robertson, Stuart D. ORCID: https://orcid.org/0000-0002-9330-8770

Mulvey, Robert E. ORCID: https://orcid.org/0000-0002-1015-2564

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• Item metadata

  Item type:	Article
  ID code:	91590
  Dates:	Date Event 13 December 2024 Published 13 December 2024 Published Online 3 December 2024 Accepted 23 September 2024 Submitted
  Subjects:	Science > Chemistry
  Department:	Faculty of Science > Pure and Applied Chemistry
  Depositing user:	Pure Administrator
  Date deposited:	16 Dec 2024 13:01
  Last modified:	17 Dec 2024 09:03
  URI:	https://strathprints.strath.ac.uk/id/eprint/91590