摘要:
A process can be used for preparing aldehydes from C2 to C20 olefins with a subsequent thermal separation for removal of the aldehyde formed. The process involves a membrane separation, which is preceded by performance of a gas exchange by which the proportion of the partial pressure represented by carbon monoxide or hydrogen is increased in order to reduce catalyst losses.
摘要:
Proposed is a method of producing alkaline-earth salts of aliphatic .beta.-keto compounds by reacting alkaline-earth hydroxides with aliphatic .beta.-ketoesters and/or .beta.-diketones in the absence of solvent to give the corresponding alkaline-earth salts. The .beta.-keto compound is added in portions to the powdered alkaline-earth hydroxide and the reaction mixture subsequently dried. Good yields are obtained of a fine-grained, light colored product.
摘要:
A process for the vapor-phase synthesis of non-adduct volatile fluorinated and non-fluorinated metal-ligand complexes comprising contacting a .beta.-diketone or .beta.-ketoimine ligand with an inert carrier gas to vaporize the ligand, reacting the vaporized ligand with a metal species at a temperature sufficient to form the metal-ligand complex and recovering the metal-ligand complex by sublimation. The process is conducted in the absence of solvent thereby providing pure non-adduct metal-ligand complexes. Such complexes are particularly suited for specialty applications requiring use of high purity compounds.
摘要:
Preparation of palladium(II) bis(hexafluoracetylacetonate) and adducts derived therefrom are disclosed, said adducts having the formulaPd(F.sub.6 ACAC).sub.2.L.sub.nwherein L is a Lewis base selected from certain classes, and n is an integer from 1 to 4. These compounds are useful in preparing catalytic and primer surfaces of elemental palladium.
摘要:
A chelated compound of uranium (IV) or thorium is prepared by reacting an anhydrous halide of uranium (IV) or thorium with a chelating agent such as acetylacetone in the presence of an anhydrous solvent and gaseous ammonia in the temperature range of 10 to 60.degree. C.
摘要:
Thallous salts of .beta.-dicarbonyl compounds, prepared by reaction of the .beta.-dicarbonyl compounds with a thallous alkoxide, are treated with alkyl halides to give C-alkyl products in high yield, with acyl halides at room temperature to give C-acyl products, and with acyl halides at low temperatures to give O-acyl products. Thallous phenolates are esterified with acyl or aroyl halides. Anhydrides are also prepared, as are biaryls and bi-sec-alkyls. N-Heterocyclics, including purines and pyrimidines, are N-alkylated. Lactams are O-acylated or N-alkylated.
摘要:
A paramagnetic shift reagent, consisting of the europium (Eu) complex of 1,1,1,2,2,6,6,7,7,7-decafluoro-3,5-heptanedione (H(FHD)), said complex having the general formula Eu(FHD)3.
摘要:
A TRANSITION METAL COMPLEX OF 3,3''-METHYLENE-BIS-(5TERT.-BUTYL-2,4-DIHYDROXY BENZOPHENONE). THE COMPLEX CAN BE USED TO STABILIZE POLYOLEFINS AGAINST ULTRAVIOLET LIGHT.
摘要:
A LANTHANIDE CHELATE OF A FLUORINATED LIGAND IS USED AS A NUCLEAR MAGNETIC RESONANCE SHIFT REAGENT FOR SPECTRAL SIMPLIFICATION AND CLARIFICATION. SINCE THE USE OF THE SHIFT REAGENTS OF THIS INVENTION FACILITATES COMPOUND IDENTIFICATION AND INCREASES THE SCOPE OF THE APPLICABILITY OF NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY, THE PRESENT INVENTION IS PARTICULARLY USEFUL IN DETECTING AND ANALYZING COMPOUNDS WHICH ARE OR MAY BE POLLUTANTS.
摘要:
LIGANDS OR CO-ORDINATING AGENTS WHICH WILL FORM A CO-ORDINATION COMPLEX WITH A METAL AND WHICH ALSO INCLUDE A SILVER HALIDE DEVELOPING FUNCTION PARTICULARLY A PARADIHYDROXYPHENYL SILVER HALIDE DEVELOPING FUNCTION OR A SUBSTITUTED DERIVATIVE THEREOF, THEREBY MAKING THEM ADDITIONALLY USEFUL IN PHOTOGRAPHY.