| Shrnutí: | <p>This DPhil thesis ventures into the innovative domains of main group chemistry, focusing on interactions with NH3 and CO, revealing unique bonding behaviours and stabilization mechanisms within novel chemical systems. The research showcases the hexavalent nickel complex Ni(BeCp)6, with its unconventional C3v geometry and aromatic stabilization, and delves into the realm of frustrated Lewis pair (FLP) and cage systems, exemplified by (Ph2P-xan)3B. These discoveries propose novel directions for main group element chemistry and FLP applications.</p>
<p>The thesis comprises seven chapters, each contributing significant insights and proposing future research directions. Chapter 1 expands the understanding of beryllium chemistry, introducing heteroleptic beryllium complexes and suggesting their potential in materials science and catalysis. Chapter 2's exploration of Ni(BeCp)6 opens new perspectives on metal-ligand interactions due to its unique structural and electronic properties. Chapter 3 investigates heavy analogues of cyclobutene, challenging conventional notions of aromaticity in heavy element systems.</p>
<p>Chapter 4 reports a planar per-borylated digermene, challenging traditional geometries of dimetallenes and suggesting novel synthetic targets for further investigation. Chapter 5 focuses on CO coordination and homologation at Al(I), proposing a unique mechanism involving a transient carbene species, which could lead to innovative CO utilization methods. Chapter 6 discusses FLP systems' interaction with NH3, uncovering mechanisms that pre-activate N-H bonds, potentially enabling novel catalytic processes.</p>
<p>Finally, Chapter 7 introduces novel borane xanthene phosphine-based cage systems, offering a new method for stabilizing borane carbonyls and suggesting their potential as ligands in transition metal complexes for catalytic applications. This thesis not only broadens the understanding of main group chemistry but also lays the groundwork for future studies in the synthesis, characterization, and application of novel chemical systems, with implications for materials science, catalysis, and the activation and functionalization of small molecules.</p>
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