Ether Phosphines

Hexa-fluorobisphenol A (HFBPA) based polysulfone and poly(arylene ether phosphine oxide) were prepared by nucleophilic aromatic substitution similar to that of bisphenol-A-based polysulfone and poly(arylene ether phosphine oxide).11... 

PEPOs. See Poly(arylene ether phosphine oxide)s (PEPOs)... 

Poly(arylene ether ketone)s (PEKs), 327 block and graft copolymers of, 359-361 hyperbranched, 349 modification of, 354 synthesis of, 340-345, 360 Poly(arylene ether phosphine oxide)s (PEPOs), 345... 

E. Lindner, A. Jaeger, F. Auer, W. Wielandt and P. Wegner, Supported organometallic complexes. Part XIII. Catalytic studies on sol-gel processed (ether phosphine)ruthenium(II) complexes with different spacer lengths and different polysiloxane matrices, J. Mol. Catal. A Chem., 1998, 129, 91. 

These polymers show lower water uptake than the analogous sulfonated poly(arylene ether sulfone) materials, possibly suggesting some interaction between the aromatic nitrile and sulfonic acid. The phosphine oxide functional moiety could also be used as a compatibilizer with other materials. Sulfonated poly(arylene ether phosphine oxide sulfone) terpoly-mers have been prepared both with sulfonated triphenyl phosphine oxide and with triphenyl phosphine oxide with 3,3 -disulfonate-4,4 —dichlorodiphenyl sulfone as the sulfonic acid bearing monomer. Block copolymers containing phosphine oxide appear to avoid the ether—ether interchange that results when non—phosphine oxide blocks are utilized, and this is being further pursued. ... 

In contrast, 1,5-cyclo-octadiene remains coordinated during the catalytic cycle of hydrogenation of phenylacetylene to styrene, catalyzed by the related iridium complex [Ir(C0D)( Pr2PCH2CH20Me)]BF4. This complex, which contains an ether-phosphine-chelated ligand, catalyzes the selective hydrogenation reaction via a dihydrido-cyclo-octadiene intermediate. The reaction is first order in each of catalyst, phenylacetylene and hydrogen [11] the proposed catalytic cycle is shown in Scheme 2.3. 

Chiral crown ether phosphine-palladium complexes have been used to catalyse the alkylation of carbanions derived from a-nitro ketones and a-nitro esters,63 and proline rubidium salts have been used to catalyse asymmetric Michael addition of nitroalkanes to prochiral acceptors 64 80% enantioselectivity can be achieved in each case. 

Lindner, E. Ghanem, A. Warad, I. Eichle, K. Mayer, E. Schurig, V. Asymmetric hydrogenation of an /J-unsaturated ketone by diamine(ether-phosphine)ruthenium(II) complexes and lipase-catalyzed kinetic resolution a consecutive approach. Tetrahedron Asymmetry 2003, 14, 1045-1053. 

We have limited our discussion of n-donor derived radical cations to a single structure type. Other n-donors include hydrazines, polycyclic amines, ethers, phosphines, and thioethers. Several dioxetane radical cations were mentioned in Section 4.1. A detailed or even cursory discussion of these donors exceeds the scope of this article. 

Beryllium halides are Lewis acids that form adducts with many types of electron pair donors (amines, ethers, phosphines, etc.), and they readily form complex ions. For example, the BeF42 ion results from the reaction... 

In assessing these results, it should be remembered that the temperatures in most cases were above 0°C so that dimer formation has to be taken into account. On the one hand, dimerization reduces the yield and, on the other hand, it influences the course of polymerization through a regulating effect. Since we wished to obtain soluble polymers, we had to look for different routes. In doing so, we found that soluble polymers can be obtained when the reaction is carried out in polar solvents such as ethers or in inert solvents such as toluene or hexane in the presence of cocatalysts—ethers, phosphines, amines, or organoaluminum compounds. The polymers obtained are thermoplastic and consist mainly of 1,4-and 3,4-adducts in a 3 1 ratio. 

A similar technique was used to immobilize rhodium with silyl-ether phosphine ligands (2) on silica for the hydroformylation of 1-hexene [16-18]. This method... 

Remarkably, the heterogenisadon process can confer dramatically enhanced activity on the metal complex. Thus, the dimolybdenum complex [Mo2(MeCN)8][BF4]-Si02 prepared by direct reaction of silica with the metal complex is unusual in its ability to catalyse the polymerisation of norbomene in the absence of an aluminium co-catalyst and at moderate temperatures.165 Sol-gel processing of the ruthenium complex m-Cl(H)Ru(CO)(P)3 (where P is a coordinated ether-phosphine) with tetraethoxysilane and [Al(0-i-Pr)3] gives a stable material with moderate surface area which is active in the hydrogenation of fraras-crotylaldehyde with reasonable chemoselectivity to the carbonyl reduced products, cis- and trans-crotyl alcohol.166... 

Me2CHN02, NaOt-Bu azacrown ether-phosphine oxide O2... 

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