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- W4306787401 abstract "Dodecacarbonyltriruthenium Ru3(CO)12 has been immobilized onto a biopolymer (chitosan) supported on SiO2 ([email protected]2) to give Ru−[email protected]2. [email protected]2 behaves as a soft, recoverable and bulky ligand allowing the stabilization of released Ru active species and preventing its irreversible reduction to Ru0. Under these conditions very high activity (TOF= 1086 h−1; TON=2749) and regioselectivity (n:iso=92 : 8) are obtained, surpassing that of the homogeneous Ru3(CO)12 counterpart. Spectroscopic studies have shown that Ru3(CO)12 transforms into a mononuclear Run+ (n=2,3) di o try carbonyl species by interacting with the amido/amino groups of the biopolymer, being released into the reaction media whilst stabilized by the chitosan functional groups. The herein 0.5 [email protected]2 catalyst can operate be operated under a semi-continuous mode for at least 14 h without deactivation, representing providing a starting point in the search for a green catalyst with definitive industrial application in hydroformylations. In particular in the search for a heterogeneous catalyst away from the use of phosphines and their known drawbacks (i. e. tedious synthesis, facile oxidation of phosphor center, ..) as well as expensive Rh as active site." @default.
- W4306787401 created "2022-10-20" @default.
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- W4306787401 date "2022-11-17" @default.
- W4306787401 modified "2023-09-24" @default.
- W4306787401 title "Chitosan‐Silica as a Cheap Carrier and Green Soft Ligand for Improved Ru‐catalyzed Hydroformylation" @default.
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- W4306787401 doi "https://doi.org/10.1002/cctc.202200861" @default.
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