Ethylamine complexes

BORON TRIFLUORIDE/ETHYLAMINE COMPLEX (0.4%) Fig. 2. Chemical constituents of Fiberite 934 epoxy resin... 

On another side, the synthesis of the diphosphirenium salt (4d) by treatment of amino-substituted 1,3-diphosphapropene with boron trifluoride-ethylamine complex at room temperature was reported (Equation (11)) <9iJA8i60, 94JA6149). Its structure has been established by x-ray diffraction study and shows a substantial participation of resonance structures and the ionic character of the salt. 

Catalytic curing agents require a temperature of 200°F (93°C) or higher to react. These epoxy formulations exhibit a longer working life than the aliphatic amine cured epoxies. The exothermic reaction may be critically affected by the mass of the resin mixture. Typical materials used include piperidine, boron trifluoride ethylamine complex, and benzyl dimethyl-amine (BDMA). 

Spectroscopic and chemical studies of vanadyl OEP have been reported, including m 50-substitution to form nitro-, chloro-, and benzoyloxy-derivatives trans-alkylation occurs when the vanadyl porphyrin is heated on clay and other supports, thus providing a model for the generation of homologous polyalkyl-porphyrins in crude oil and bitumen. m sa-Tetraferrocenyl-porphyrin and its copper complex have been prepared, and spectroscopic and other studies carried out on mixed-valence oxidation products, as models for the study of thermal electron-transfer processes in cytochrome-c. X-Ray crystal structures have been reported for diaquo and perchlorate complexes of Fe" TPP, " dichloro-molybdenum complexes of OEP and TPP, and for the bis-[(R5)-l-phenyl-ethylamine] complex " of Co TPP. Oxomolybdenum complexes TPP-... 

To minimize the formation of fuhninating silver, these complexes should not be prepared from strongly basic suspensions of silver oxide. Highly explosive fuhninating silver, beheved to consist of either silver nitride or silver imide, may detonate spontaneously when silver oxide is heated with ammonia or when alkaline solutions of a silver—amine complex are stored. Addition of appropriate amounts of HCl to a solution of fuhninating silver renders it harmless. Stable silver complexes are also formed from many ahphatic and aromatic amines, eg, ethylamine, aniline, and pyridine. 

In the case of tertiary N-ethylamine derivatives the N-ethyl group is first selectively oxidized by p-chloranil to an enamino group which then condenses with excess p-chloranil to a blue aminovinylquinone derivative [7]. Secondary N-ethyl derivatives do not yield blue aminovinylquinone derivatives they probably react directly with chloranil by nucleophihc attack at one of the four chlorine atoms to yield aminoquinones of other colors [7], It has also been suggested that some classes of substances react to yield charge transfer complexes [1, 5, 8, 12],... 

HPentafluorophenyOadamantane, 59, 130 (Pentafluorophenyl)benzene, 59, 127 Pentafluorophenylcopper, 59, 124 Pentfluorophenylcopper complexes, 59, 127 PENTAFLUOROPHENYLCOPPER TETRAMER, 59,122 2-(Pentafluorophenyl)ethylamine hydrochloride, 57, 82... 

The molecular modelling approach, taking into account the pyruvate—cinchona alkaloid interaction and the steric constraints imposed by the adsorption on the platinum surface, leads to a reasonable explanation for the enantio-differentiation of this system. Although the prediction of the complex formed between the methyl pyruvate and the cinchona modifiers have been made for an ideal case (solvent effects and a quantum description of the interaction with the platinum surface atoms were not considered), this approach proved to be very helpful in the search of new modifiers. The search strategy, which included a systematic reduction of the cinchona alkaloid structure to the essential functional parts and validation of the steric constraints imposed to the interaction complex between modifier and methyl pyruvate by means of molecular modelling, indicated that simple chiral aminoalcohols should be promising substitutes for cinchona alkaloid modifiers. Using the Sharpless symmetric dihydroxylation as a key step, a series of enantiomerically pure 2-hydroxy-2-aryl-ethylamines... 

A versatile synthesis of monoamine platinum(II) complexes of the type ptCl3(amine)], where the nature of the amine ligand can be varied readily, involves treatment of the iodo-bridged dimer [PtI(/r-I)L]2 (L = NH3, methylamine, ethylamine, isopropylamine, cyclobutylamine, and... 

The formation of such complexes apparently involves a delicate balance of binding forces, since a-phenyl-ethylamine 30 shows only modest tendencies to form 2 1 complexes and its stacking efficiency is reduced. The structural details of these complexes are not known, but intermoleeular NOE experiments favor structures such as shown in 31. The distance between the aromatic and amine recognition sites in the... 

DCM (anhydrous), DMSO (anhydrous), triethylamine (99 + %), sulfur trioxide-pyridine complex, DMA (anhydrous), potassium tert-butoxide (95%), DCE (anhydrous), 2-(4-methoxyphenyl)ethylamine (98 + %), sodium triacetoxy-borohydride (95%), A/A-diisopropylethylamine (99%), p-toluenesulfonyl chloride (99 + %), and trifluoroacetic acid (99 + %) were obtained from Aldrich Chemical Company, Inc. 4-Hydroxy-2-methoxybenzaldehyde (>98%) was obtained from Fluka Chemie, AG. 

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