Fluorenyl-tethered N-heterocyclic carbene (NHC): an exclusive C-donor ligand for heteroleptic calcium and strontium chemistry

Sumana Mondal; Subham Sarkar; Chhotan Mandal; Dibyendu Mallick; Debabrata Mukherjee

doi:10.1039/d4cc00397g

Fluorenyl-tethered N-heterocyclic carbene (NHC): an exclusive C-donor ligand for heteroleptic calcium and strontium chemistry

Chem Commun (Camb). 2024 Apr 23;60(34):4553-4556. doi: 10.1039/d4cc00397g.

Authors

Sumana Mondal¹, Subham Sarkar^{1

2}, Chhotan Mandal¹, Dibyendu Mallick², Debabrata Mukherjee¹

Affiliations

¹ Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, 741246, West Bengal, India. d.mukherjee@iiserkol.ac.in.
² Department of Chemistry, Presidency University, 86/1 College Street, Kolkata, West Bengal, 700073, India. dibyendu.chem@presiuniv.ac.in.

PMID: 38568715
DOI: 10.1039/d4cc00397g

Abstract

Exclusive C-donating ligands are rarely used with kinetically labile heavier alkaline earths (Ca, Sr, Ba). We report herein the aptitude of a combination of NHC with fluorenyl connected by a flexible -(CH₂)₂- linker as a ligand support for heteroleptic Ca- and Sr-N(SiMe₃)₂ and iodides. The Ca-N(SiMe₃)₂ complex even catalyzes the intramolecular hydroamination of aminoalkenes to showcase the effectiveness of this ligand framework.