A Novel Bulky Heteroaromatic‐Substituted Methanide Mimicking NacNac: Bis(4, 6‐tert‐butylbenzoxazol‐2‐yl)methanide in s‐Block Metal Coordination1. Issue 53 (22nd August 2017)

• Record Type: Journal Article
• Authors: Koehne, Ingo; Bachmann, Sebastian; Niklas, Thomas; Herbst‐Irmer, Regine; Stalke, Dietmar
• Is Part Of: Chemistry. Volume 23:Issue 53(2017)
• Page Start: 13141
• Page End: 13149
• Publication Date: 2017-08-22
• Subjects: ligand design -- metalation -- NacNac -- s-block chemistry -- substituted methanides; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201702378
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A novel bulky bis(4, 6‐ t Bu‐benzoxazol‐2‐yl)methane ligand was synthesized in a straightforward three‐step synthesis. The corresponding complexes [Li{(4, 6‐ t Bu‐NCOC6 H2 )2 CH}THF], [K{η 5 ‐(4, 6‐ t Bu‐NCOC6 H2 )2 CH}]∞, and [MgCl{(4, 6‐ t Bu‐NCOC6 H2 )2 CH}(THF)2 ] were obtained upon metalation with alkaline or alkaline‐earth‐metal reagents. Reduction of [MgCl{(4, 6‐ t Bu‐NCOC6 H2 )2 CH}(THF)2 ] with potassium metal or KC8 led to the formation of the homoleptic compound [Mg{(4, 6‐ t Bu‐NCOC6 H2 )2 CH}2 ]. All compounds were fully characterized. Their solid‐state structures as well as their behavior in solution, which was analyzed with the help of advanced NMR spectroscopic techniques, are discussed in detail. Abstract : NacNac mimic : Metalation of the methylene bridging moiety in a novel bulky bis(4, 6‐ t Bu‐benzoxazol‐2‐yl)methanide ligand with s‐block organometallic reagents gave the corresponding N, N‐chelated metal salts. Structural features in the solid state (see figure) and in solution were compared to related complexes derived from the ubiquitous NacNac ligand.