Main Group Metal Chemistry

Main group metal chemistry encompasses the synthesis, structure and reactivity of compounds in which the s- and p-block elements (notably those of groups 1, 2 and 13–16) exhibit metallic and covalent behaviour. Whereas early work focused on ionic salts of alkali and alkaline-earth metals, recent advances have revealed low-valent species of boron, aluminium, silicon and heavier congeners that activate small molecules through σ-donation and reversible bond‐forming processes. Bulky and electronically tuned ligands stabilise unusual oxidation states, enabling oxidative addition and reductive elimination at main group centres once thought exclusive to transition metals. Cooperative assemblies that pair main group fragments with transition metals create multi-site catalysts for bond‐scission and cycloaddition reactions. In parallel, group 1 and 2 metal hydroxides and oxyanions underpin cement chemistry, water-treatment reagents and solid electrolytes for batteries, while group 13 and 14 precursors serve as single-source materials for thin-film semiconductors and flame-retardant polymers. Emerging electrocatalysts and photocatalysts derived from abundant main group metals promise sustainable routes for water splitting, carbon capture and the replacement of scarce noble metals in industrial processes. Collectively, these developments demonstrate how fundamental insights into orbital symmetry, ligand design and reactivity translate into global applications in energy, materials and environmental technologies.

Research from Nature Portfolio

A modular nickel‐catalysed germylative alkylation has been developed that couples activated olefins, alkyl halides and chlorogermanes in a single step to forge both C–Ge and C–C bonds. The protocol accommodates primary, secondary and tertiary electrophiles, tolerates a wide range of functional groups and enables late-stage introduction of germanium motifs into complex natural products and pharmaceuticals. In a complementary approach, simple earth-abundant reagents—potassium bis(trimethylsilyl)amide or even potassium hydroxide—have been shown to catalyse rapid assembly of germasiloxanes and alkynylgermanes under mild conditions. This base-promoted pathway circumvents the need for precious metals or specialised ligands, offering an operationally simple route to diverse organogermane scaffolds for further elaboration.

Main Group Metal Chemistry publication trend

The graph below shows the total number of articles in main group metal chemistry across all publications each year (not limited to Nature Index journals).

Technical terms

Main group metals: Elements of groups 1, 2 and 13–16 that form compounds ranging from ionic salts to covalent complexes, distinguished from d-block transition metals.

Low-valent species: Compounds in which an element adopts an oxidation state lower than its common or maximum valence, often with unconventional reactivity.

Oxidative addition: A reaction where a main group centre inserts into a σ-bond, increasing its formal oxidation state and coordination number.

Aluminate ion: The tetrahedral anion [Al(OH)₄]⁻ prevalent in strongly alkaline aluminium solutions.

Gibbsite: The polymorph Al(OH)₃ precipitated from aluminate solutions, important in alumina production.

Germane (R–GeH₃): An organogermanium compound used as starting material or intermediate in C–Ge bond‐forming reactions.

Hydrogermylation: Addition of a Ge–H bond across a C=C or C≡C bond, yielding alkyl or vinyl germanes with regiochemical control.

Seeding: The introduction of solid nuclei to direct precipitation, control particle size and morphology in crystallisation processes.

References

1. An amorphous sodium aluminate hydrate phase mediates aluminum coordination changes in highly alkaline sodium hydroxide solutions. Inorganic Chemistry Frontiers (2022).
2. Enhanced Precipitation of Gibbsite from Sodium Aluminate Solution by Adding Agglomerated Active Al(OH)3 Seed. Metals (2023).
3. Modular access to alkylgermanes via reductive germylative alkylation of activated olefins under nickel catalysis. Nature Communications (2023).
4. Access to germasiloxanes and alkynylgermanes mediated by earth-abundant species. Scientific Reports (2023).