Cyclic (Alkyl)(Amino)Carbene-Stabilized Aluminum and Gallium Radicals Based on Amidinate Scaffolds
Mujahuddin M. Siddiqui, Samya Banerjee, Sanjoy Bose, Samir Kumar Sarkar, Sandeep K. Gupta, Johannes Kretsch, Nico Graw, Regine Herbst‐Irmer, Dietmar Stalke, Sayan Dutta, Debasis Koley, Herbert W. Roesky
Abstract
Neutral, mononuclear aluminum and gallium radicals, stabilized by cyclic (alkyl)(amino)carbene (cAAC), were synthesized. LMCl2 upon reduction with KC8 in the presence of cAAC afforded the radicals LMCl(cAAC), where L = PhC(NtBu)2 and M = Al (1), Ga (2). The radicals were characterized by X-ray crystallography, electron paramagnetic resonance (EPR) spectroscopy, and mass spectrometry. EPR, SQUID measurement, and computational calculations confirmed paramagnetism of the radicals with unpaired spin mainly on cAAC.
Topics & Concepts
ChemistryElectron paramagnetic resonanceRadicalGalliumAlkylCarbeneParamagnetismUnpaired electronPhotochemistryMass spectrometryNuclear magnetic resonanceOrganic chemistryCatalysisPhysicsQuantum mechanicsChromatographyN-Heterocyclic Carbenes in Organic and Inorganic ChemistrySynthesis and characterization of novel inorganic/organometallic compoundsOrganometallic Complex Synthesis and Catalysis