New hydrofluoropolyethers

Nontargeted mass-spectral detection of chloroperfluoropolyether carboxylates in New Jersey soils

“…329238-24-6)" (11), as reported in a product assessment by the European Food Safety Authority (EFSA) at the request of "Solvay Solexis, Italy" (12). With these reports, together with compoundsynthesis papers by Solvay chemists (13,14), the structure of these ClPFPECAs appears to be as shown in Fig. 1 for 70% of production, with 30% having an alternative terminus of ClCF 2 CF(CF 3 )O-.…”

New hydrofluoropolyethers II: Physico-chemical characterization

“…However, the analysis of both yield and by-products structures, together with experiments devoted to the elucidation of the reactivity of possible intermediates, confirm that an unconventional reaction pathway is effective. In fact, the target product is obtained by hydrogenolysis of the addition product between two key intermediates: aldehyde and alcohol [26].…”

“…The conversion of OCF 2 COCl to OCF 2 CH 3 previously described [26] is independent from the length and the structure of the chain bonded to the reactive centre, so that the proposed synthetic approach is of wide scope and applicability.…”

“…In a previous work this fruitful approach has been further on explored with the aim of finding new reaction routes, starting from functionalised fluoropolyethers, for the synthesis of new HFPEs [26].…”

Assessment of model chemistries for hydrofluoropolyethers: A DFT/M08‐HX benchmark study

“…Regrettably, some HFEs were also found to possess environmental hazards (i.e., high GWP, flammability hazard and adverse effect of exposure), which again prompted the development of new alternatives, such as hydrofluoropolyethers (HFPEs). Such partially fluorinated polyethers have been developed considering possible advantages in terms of their toxicity with respect to HFEs, while maintaining a low environmental impact and strong similarity in the chemical and physical properties between them and second‐generation replacements . Research efforts in finding better alternatives to second‐generation replacements have gained a renewed importance since October 2016, when nearly 200 countries adopted the Kigali Amendment to the Montreal Protocol, which phases‐down production and use of HFCs and is considered by the United Nations Environment Programme (UNEP) “the single largest contribution the world has made towards keeping the global temperature rise well below 2°C, a target agreed at the Paris climate conference last year.”…”