![]() Comment on ‘The oxidation state in low-valent beryllium and magnesium compounds’ by M. The oxidation state in low-valent beryllium and magnesium compounds. Gauging radical stabilization with carbenes. Access to a labile monomeric magnesium radical by ball-milling. Rare-earth metal π-complexes of reduced arenes, alkenes, and alkynes: bonding, electronic structure, and comparison with actinides and other electropositive metals. A stable, crystalline beryllium radical cation. Neutral zero- valent s-block complexes with strong multiple bonding. Stable ‘inverse’ sandwich complex with unprecedented organocalcium(I): crystal structures of and. Krieck, S., Görls, H., Yu, L., Reiher, M. ![]() Non-nuclear attractor in a molecular compound under external pressure. Wu, L.-C., Jones, C., Stasch, A., Platts, J. First experimental characterisation of a non-nuclear attractor in a dimeric magnesium(I) compound. A., Overgaard, J., Jones, C., Iversen, B. On the existence of low-valent magnesium–calcium complexes. Mai, J., Rösch, B., Patel, N., Langer, J. Dimeric magnesium(I) β-diketiminates: a new class of quasi-universal reducing agent. Valence, oxidation number, and formal charge: three related but fundamentally different concepts. Stable magnesium(I) compounds with Mg–Mg bonds. Best described as polarized Mg δˉ–Ae δ+ bonds, these complexes show potential as alkane-soluble reductants for bond activation, which readily react with benzene by C–H bond cleavage and are oxidized to discrete complexes with N 2O. Crystal structures feature examples of Mg–Ca and Mg–Sr bonding with formal oxidation states of Mg 0–Ae II. Mixing 2 and 2 dimers led to anion–cation exchange and exclusive formation of mixed species: (BDI)MgˉNa +/Ae(NR 2) 2 (Ae = Ca, Sr, Ba R = SiMe 3). Here we describe a facile method to prepare stable but highly reactive complexes with heterobimetallic Mg–Ae bonds. As the metal–metal bond strength descending group 2 rapidly decreases, BDI complexes of the heavier Ae I (alkaline earth) ions (Ae = Ca, Sr, Ba) probably exist as (BDI)Ae Attempts to isolate similar, but considerably more reactive, Ca–Ca bound complexes have so far failed. Low-oxidation-state complexes of type (BDI)Mg–Mg(BDI) (BDI, β-diketiminate) show broad reactivity, finding application as soluble, universal reducing agents, enriching the field of early main group metal chemistry.
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