1059574-25-2

Upstream product

• 67-56-1 methanol 
• 934-53-2 cumenyl chloride 
• 223769-13-9 1,2-C₆F₄(B(C(C₆F₅)2)2 
• 2720-03-8 bis(pentafluorophenyl)boron chloride 
• 2118-02-7 bis(pentafluorophenyl)borinic acid 
• 768-66-1 2,2,6,6-tetramethyl-piperidine 
• 124-38-9 carbon dioxide 
• 1109-15-5 tris(pentafluorophenyl)borate 
• 640270-80-0 [C6F4(B(C6F5)2)2(μ-Cl][CMe2Ph] 
• 165612-94-2 bis(pentafluorophenyl)borohydride 

Downstream Products

• 1059574-27-4 C₁₃H₅BF₁₀O₂ 
• 67-56-1 methanol 
• 363-72-4 Pentafluorobenzene 

Relevant academic research and scientific papers

Aqueous suspension polymerization of isobutene initiated by 1,2-C 6F4[B(C6F5)2]2

Lewis acidic, chelating diborane 1 forms stable oxonium acids 2 in the presence of excess MeOH or water. Diborane 1 is shown to be an effective co-initiator for the suspension polymerization of isobutene in aqueous media at sufficiently low temperatures.

PROCESS FOR PRODUCING METHANOL

The present invention relates to a novel process for the production of methanol. The process comprises the heterolytic cleavage of hydrogen by a frustrated Lewis pair comprising a Lewis acid and a Lewis base; and the hydrogenation of CO2 with the heterolytically cleaved hydrogen to form methanol.

Isobutene polymerization using chelating diboranes: Polymerization in aqueous suspension and hydrocarbon solution

The use of the chelating diboranes o-C6F4[B(C 6F5)2]2 (1) and o-C 6F4(9-BC12F8)2 (2: 9-BC12F8 = 1,2,3,4,5,6,7,8-octafluoro-9-borafluorene) for the polymerization of isobutene (IB) in aqueous suspension or in hydrocarbon solution was studied. Polymerizations in aqueous suspension provided polymer of moderate MW and at variable conversion and were dependent on temperature, mode of diborane addition, the presence of surfactant, and the acidity of and nature of the anion present in the aqueous phase. The T dependence of MW over the T range -80 to -20 °C was studied in aqueous suspension, and higher MW polymer was formed at lower T. The hydrolysis and methanolysis of diboranes 1 and 2 was studied by NMR spectroscopy. Reactions of diborane 1 with excess MeOH or water afford solutions containing oxonium acids [o-C6F4{B(C 6F5)2}2(μ-OR)][(ROH) nH] (7: R = H, n > 2; 3: R = Me, n = 3). When diborane 1 is present in excess over water or MeOH, degradation of the diborane is observed. In this case the products are o-C6F4{B(C6F 5)2}H (5) and (C6F5)2BOH 7 or (C6F5)2BOMe 4, respectively. In the case of diborole 2, o-C6F4(9-BC12F 8)B(2-C12F8-2"-H)(μ-OH) · 7H2O (17) and o-C6F4(9-BC12F 8)B(2-C12F8-2"-H)(μ-OMe) (11) were isolated from reactions of 2 with water and MeOH, respectively, and were characterized by X-ray crystallography. None of these degradation products effect IB polymerization in aqueous suspension. As a model for initiation of polymerization, the reaction of diborole 2 with 1,1-diphenylethylene (DPE) was studied. Addition of MeOH at low T results in efficient formation of the ion-pair [Ph2CMe][o-C6F4(9-BC 12F8)2(μ-OMe)] via protonation of DPE. Polymerizations in hydrocarbon media were exothermic and rapid and gave quantitative yields of polymer even at very low concentrations of diborane 1. The T dependence of MW was studied in hydrocarbon solution and showed non-Arrhenius behavior. This was explained by competitive chain transfer to monomer at elevated T and chain transfer to molecular water at lower T.

Hydrogen bonding and Lewis acid-base interactions in the system bis(pentafluorophenyl)borinic acid/methanol

Methanol does not significantly affect the position and the rate of the equilibrium between the monomeric (1m) and cyclic trimeric (1 t) forms of bis(pentafluorophenyl)borinic acid, Ar2BOH (1, Ar = C6F5/su

Formation of chelated counteranions using lewis acidic diboranes: Relevance to isobutene polymerization

The reactions of chelating diboranes with PhCMe2Cl and related initiators were studied by variabletemperature NMR spectroscopy. Although thermally stable ion-pairs featuring weakly coodinating anions (WCA) are formed, isobutene polymerization is complicated by the tendency of these WCA to act as hindered bases toward Bronsted acidic chain ends.