摘要:
The invention relates to ferrocenyldiphosphine ligands containing a silylene group, ferrocenyldiphosphines bound to inorganic or polymeric organic supports by this silylene group, their preparation and also their metal complexes with transition metals such as rhodium or iridium. The invention also relates to the use of these complexes for hydrogenating organic double or triple bonds, in particular olefinic double bonds and carbon-heteroatom double bonds. The complexes are particularly suitable for enantioselective hydrogenation using chiral diphosphines and prochiral unsaturated compounds.The preparation of these immobilized ferrocenyldiphosphines has only been made possible by the provision of correspondingly functionalized ferrocenyldiphosphines. These compounds and their preparation are likewise novel.Accordingly, the invention also provides compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.8 alkyl, phenyl or phenyl substituted by from 1 to 3 C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxyalkoxy groups;R.sub.2, R.sub.3, R.sub.10 and R.sub.11 are, independently of one another, C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.12 cycloalkyl, phenyl, C.sub.5 -C.sub.12 cycloalkyl substituted by C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy, or phenyl substituted by from one to three C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, --SiR.sub.4 R.sub.5 R.sub.6, halogen, --SO.sub.3 M, --CO.sub.2 M, --PO.sub.3 M, --NR.sub.7 R.sub.8, --[+NR.sub.7 R.sub.8 R.sub.9 ]X.sup.- or C.sub.1 -C.sub.5 fluoroalkyl groups; or the groups --PR.sub.2 R.sub.3 and --PR.sub.10 R.sub.11 are each, independently of one another, a radical of the formula II, IIa, IIb or IIc ##STR2## and R.sub.4, R.sub.5 and R.sub.6 are, independently of one another, C.sub.1 -C.sub.12 alkyl or phenyl;R.sub.7 and R.sub.8 are H, C.sub.1 -C.sub.12 alkyl, phenyl orR.sub.7 and R.sub.8 are together tetramethylene, pentamethylene or 3-oxa-1,5-pentylene,R.sub.9 is H or C.sub.1 -C.sub.4 alkyl;R.sub.12 are identical or different radicals and are, independently of one another, C.sub.1 -C.sub.12 alkyl,C.sub.3 -C.sub.7 cycloalkyl, benzyl or phenyl or together are C.sub.5 -C.sub.12 alkylene andR.sub.13 is C.sub.1 -C.sub.12 alkylene or phenylene,M is H or an alkali metal,X.sup.- is the anion of a monobasic acid,Z is CI, NH.sub.2, NH--C.sub.1 --C.sub.12 alkyl, or a group --A--CO--NH--R.sub.14 --Si(R.sub.a).sub.n (OR.sub.15).sub.3-n,in whichA is NH or N(C.sub.1 -C.sub.12 alkyl),R.sub.14 is C.sub.1 -C.sub.12 alkylene,R.sub.15 is C.sub.1 -C.sub.12 alkyl,R.sub.a is C.sub.1 -C.sub.4 alkyl or OR.sub.15,n is 0, 1 or 2;where the compounds of the formula I are present in the form of their racemates and diastereomers or mixtures of diastereomers.
摘要:
Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/l, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.
摘要:
Nonporous polymer beads having an average diameter of about 1-100 microns are suitable for chromatographic separation of mixtures of nucleic acids when the polymer beads are alkylated with alkyl chains having at least three carbon atoms. The polymer beads provide efficient separation of nucleic acids using ion-pair reverse phase chromatography.
摘要:
A coating resin comprising a polymer obtained by polymerizing an unsaturated monomer represented by the formula (I): ##STR1## wherein R is H or an alkyl group, and X is selected from: ##STR2## wherein R.sup.1 to R.sup.8 represent independently a hydrocarbon group, etc., and Py is a pyridyl group, alone or together with one or more other unsaturated monomers can give an antifouling coating composition having no safety problem, good storage stability and excellent antifouling effect for a long period of time.
摘要翻译:包含通过聚合由式(I)表示的不饱和单体得到的聚合物:其中R是H或烷基,X选自:R 1 CN,R 2(SO 2 R 3)a, 其中R1至R8独立地表示烃基等,Py是吡啶基,单独或与一种或多种其它不饱和单体一起可以得到没有安全问题的防污涂料组合物,具有良好的储存稳定性和 优良的防污效果长时间。
摘要:
The invention is concerned with linear and cyclic polymers or oligomers having a photoreactive ethene group. The polymers are of the formula ##STR1## wherein M.sub.a, M.sub.b, M.sub.c are monomer units for homo- or copolymers;x, y, z are mole fractions of the copolymers, whereby in each case 0
摘要:
Methods for reducing volatile organic chemical contents of carpet are disclosed which include fabricating the carpet from a plurality of yarn loops or tufts inserted into the backing of the carpet and then coating the backing with a coating composition which contain polymers characterized by an extremely low volatile organic chemical content. Accordingly, the coating compositions themselves contain reduced levels of volatile organic chemicals and, as such, the carpets coated therewith also contain reduced amounts of volatile organic chemicals.
摘要:
The present invention provides magnetic recording media comprising a magnetizable layer and optionally a backside coating provided on a nonmagnetizable substrate. At least one of the magnetizable layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is obtained from reactants comprising a free radical generator and a radiation curable polymer. The radiation curable polymer comprises a plurality of radiation curable, .alpha.-methylstyrene moieties of the formula ##STR1##
摘要:
Novel porous copolymers are disclosed which can be used to prepare ion-exchange resins and polymeric adsorbents. The copolymers comprise a copolymer of at least one monovinylidene monomer and a crosslinking monomer and have a unique cellular pore structure. The cellular structure comprises a macroporous void phase which is dispersed within a continuous copolymer phase. The porous void phase comprises a plurality of cellular void spaces which are at least partially enclosed by walls of the continuous copolymer phase. Also disclosed are processes which can be used to prepare the porous copolymers, as well as ion-exchange resins and polymeric adsorbents using the porous copolymers.
摘要:
There are disclosed a catalyst for producing an aromatic vinyl compound polymer which catalyst comprises a contact product between an (A) trivalent titanium compound and a (B) compound represented by the general formula (II) or (III)R.sup.1.sub.k M.sup.1 L.sup.2.sub.m (II)R.sup.1.sub.k M.sup.1 X.sup.2.sub.l L.sup.2.sub.m (III)a (C) an ionic compound comprising a noncoordinate anion and a cation, an aluminoxane or an organoboron compound; and optionally a (D) Lewis acid, and a process for producing an aromatic vinyl compound polymer having a high degree of syndiotactic configuration which process comprises polymerizing (a) an aromatic vinyl compound or (b) an aromatic vinyl compound together with an olefin or a diolefin in the presence of the above catalyst.By virtue of using the trivalent titanium compound, it is made possible to readily prepare the above catalyst in high yield, to efficiently produce the above (co)polymer in high catalytic activity by using the catalyst and further to enhance the syndiotacticity of the objective (co)polymer, while minimizing the by-production of unfavorable atactic (co)polymer.
摘要:
A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.