Acrylate complexes

The acrylate complex 10 was suggested to be the major solution species during catalysis, since the equilibrium in Scheme 5-11, Eq. (2) lies to the right (fQq > 100)-Phosphine exchange at Pt was observed by NMR, but no evidence for four-coordinate PtL, was obtained. These observations help to explain why the excess of phosphine present (both products and starting materials) does not poison the catalyst. Pringle proposed a mechanism similar to that for formaldehyde and acrylonitrile hydrophosphination, involving P-H oxidative addition, insertion of olefin into the M-H bond, and P-C reductive elimination (as in Schemes 5-3 and 5-5) [11,12]. 

Data on MCM graft polymerization are extremely limited. A method of preirradiation in air has been used to effect the graft polymerization of Co (II), Ni(II) and Cr(III) acrylate complexes with 2,2 -dipyridyl and 1,10-phenantroline onto a polytetrafluoroethylene powder [Ilf]. 

When rare-earth-metal ions such as Eu and Tb are bound to polyelectrolyte membranes such as poly(sodium acrylate) and poly(sodium ethene-sulphonate) their fluorescence intensities are considerably enhanced this is associated with the formation of asymmetric bonds between the rare-earth ions and the acrylate/S03 groups in the polymers. This was confirmed by the addition of EDTA to the Tb -poly(sodium acrylate) complex which, because of its preferential binding to the polymer, displaced Tb ions and resulted in reduced fluorescence of the latter. Stokes shifts of fluorescent dyes in different polymer systems have been related more to mobility effects in the polymer than polarity,and the fluorescence of hydrolysed aspirin has been found to be affected by the nature of different polymer supports.The luminescence properties of cis-(2,2 -bipyridyl)ruthenium(ii) complexes have been found to be influenced by binding the complex to a polymer matrix,as have the luminescence properties of flavones and l-octadecyl-3,3-dimethyl-6 -nitrospiro(indoline-2,2 -2H-benzopyran). Other studies of interest in-... 

Ab initio calculations for the borane-methyl acrylate complex indicate that complexation of the lone pair anti the OMe group E complex) is favored by... 

The general preference for the s-trans conformer carries over to some extent for carboxylic esters. Ab initio calculations for the borane-methyl acrylate complex show a 1.4 kcal/mol preference for the s-trans conformer (Fig. 10), presumably due to reduced steric interactions (B-H for the s-trans vs. B-CH2 for the s-cis) [33]. Solid state structures, however, show that both conformers can be observed for esters (Figs. 11 and 12). 

The X-ray structure of the indicated borane-methyl acrylate complex (Fig. 19) unequivocally confirms the design concept. The solid state structure shows a close contact (3.40 A from the center of the substituted phenyl ring to the carbonyl carbon) between the electron-rich arene and boron-bound methoxycarbo-nyl group, an arrangement which also exists in solution. As the polarizability of the aryl group is increased, the dienophile is drawn closer to the arene, suggestive of a dipole-induced attractive interaction. The air-sensitive catalyst 13 was synthesized by way of a resolution in 5 steps. 

Table 4 The binding energies for methyl acrylate complexes with the real Brookhart and Grubbs catalysts ...

Some papers describe the grafting on polymers containing bond metal complexes on the surface of organic polymers polyethylene-graft-poly(methylvinylketone)/Schiff base with 2-aminophenol 27 [6,37,155] or salicylaldehyde hydrazide [156], polyethylene-graft-poly (vinyl-1,3-diketone) [157], polytetrafluorethylene-graft-poly(acrylate)-complexes with 2,2 -bipyridyl or 1,10-phenanthroline [157]. 

CH2=CHCOO)2[HM(C2H4)(PMe3)2]2 binuclear hydrido-acrylate complexes (5.5). 

Fischer R, Danger J, Malassa G, Walther D, Gorls H, Vaughan G (2006). A key step in the formation of acrylic acid from CO2 and ethylene the transformation of a nickelalactone into a nickel-acrylate complex. Chem Commun 2510-2512... 

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