Keywordsmethandiides; lithium; potassium; molecular structures; hybrid crown ether; siloxane; disilane; mismatch complex; host–guest chemistry; alkoxide ligands; potassium complexes; secondary interactions; potassium–fluorine contacts; potassium–Cπ interactions; π ligands; s-block metals; catalysis; Grignard reagents; alkali metals; alkaline earth metals; beryllium; silicon; main group metal complexes; X-ray diffraction; multi-nuclear NMR spectroscopy; quantum chemical calculations; potassium; formamidinate; C–F bond; coordination chemistry; calcium; cyclopentadienyl; potassium; sodium; alane; aluminium; hydrogen formation; magnesium; magnesium hydride; metal hydrides; methanediides; N,N′-chelation; β-ketoimine; β-ketoiminate; lithiation; high-nuclearity clusters; crystallography; DFT calculations; X-ray crystallography; multinuclear NMR; primary laddered units; secondary laddering; magnesium complexes; magnesium iodide; N ligands; sterically-crowded ligands; triazenide ligands; allyl ligands; beryllium; coordination modes; mechanochemistry; X-ray diffraction; density functional theory calculations; lithium; sodium; alkali metals; organometallic; alkyl; NMR spectroscopy; X-ray diffraction; cryoscopy; aggregation
