Highly symmetric [Pd] clusters that present delocalized metal-metal bonds can catalyse the selective semi-reduction of internal alkynes to cis-alkenes. Studies on factors governing the formation of all-metal aromatics enabled the design of an optimised catalytic system that delivers cis-alkenes with almost complete selectivity on a gram scale with very low catalyst loadings (0.03 mol%).
Suitably
delocalized metal–metal bonds can stabilize a particular
class of discrete trinuclear complexes that are the transition-metal
counterparts of carbon-based aromatics. This chemical stability has
pivoted the development of an advantageous catalytic method for the
semireduction of internal alkynes under transfer hydrogenation condition.
The reaction does not require any additional solvent and a simple
workup delivers pure products. This combines with broad functional
group tolerance, complete cis-selectivity and catalytic charges down
to 100 ppm on multigram scale.
Following an ongoing interest in the study of transition metal complexes with exotic bonding networks, we report herein the synthesis of a family of heterobimetallic triangular clusters involving Ru and...
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