Nickel methoxide

It is also confirmed that incorporated hydride is derived from hydrosilane, rather than a methoxy group via p-hydrogen elimination (possible involvement of formal p-hydrogen ehmination of nickel-methoxide species has been reported [60]). 

Synthesis. The trimetalic nickel binary pz (75) was prepared from 69a (Scheme 14) (22). Porphyrazine 69b was reductively deprotected with sodium in ammonia then reprotected forming 74, which allowed for purification of the molecule. The pivolyl protecting group was cleaved by saponification with sodium methoxide and the dithiolate, in situ, was reacted with NiCl2-6H20 to yield the binary pz complex 75. 

Lithium-magnesium alloys, 15 135 Lithium manganate(V), 15 592 Lithium-manganese dioxide cells, 3 461 characteristics, 3 462t Lithium metaborate, 15 137 Lithium metaborate octahydrate, 4 277 Lithium metal, 15 132 uses for, 15 134 Lithium metal films, 15 128 Lithium methoxide, 15 148 Lithium nickelate, 15 142 Lithium niobate, 15 141 17 153... 

Methanol, Hydrogen, Raney nickel catalyst, 0484 Methoxyacetyl chloride, 1165 4-Methoxy-3-nitrobenzoyl chloride, 2916 Methyl formate, Methanol, Sodium methoxide, 0834 3-Methyl-2-penten-4-yn-l-ol, 2384 Nitric acid, 4436... 

Cathodic surfaces of finely divided platinum, palladium and nickel have a low hydrogen overvoltage and the dominant electrochemical reaction is the generation of a layer of hydrogen atoms. The electrocatalytic hydrogenation of aldehydes and ketones can be achieved at these surfaces. Cathodes of platinum or palladium black operate in both acid solution [203] and in methanol containing sodium methoxide [204], The carbonyl compound is converted to the alcohol. Reduction of 4-tert-butylcyclohexanone is not stereoselective, however, 1,2-diphenylpropan-l-one is converted to the / reo-alcohol. 

Several 2,5-anhydropentitols have been synthesized from suitably protected pentoses by standard procedures (see also, Ref. lb). Thus, ethyl 5-O-p-tolylsulfonyl-a-L-arabinofuranoside (11) was converted17 into the corresponding 2,5-anhydride (12) by treatment with metha-nolic sodium methoxide. The product was hydrolyzed, and the resulting 2,5-anhydro-L-arabinose was hydrogenated in the presence of Raney nickel to give 2,5-anhydro-L-arabinitol (13) as a syrup. 

Borane-Dimethylamine, 42 Dimethyl phenylsilane, 123 Diphenylsilane, 153 Lithium aluminum hydride-Sodium methoxide, 159 Potassium-Graphite, 252 Raney nickel, 265 Sodium borohydride, 278 Sodium borohydride-Molybdenum(VI) oxide, 279... 

Lithium aluminum hydride, 61, 62, 282 Lithium aluminum hydride-Bis-(cyclopentadienyl)nickel, 158 Lithium aluminum hydride-Cerium(III) chloride, 159 Lithium aluminum hydride-Hexa-methylphosphoric triamide, 159 Lithium aluminum hydride-Potassium methoxide, 159... 

The first attempts to prepare cobalt and nickel ethoxides were reported in 1936 by Meerwein [1102] and Kandelaki [875]. Application ofNaOR in the exchange reactions could not, however lead to the obtaining of the pure products of purpose as they were insoluble in the parent alcohol. Application of LiOR for this purpose permitted Adams et al. in 1966 to obtain the individual M(OMe)2 — derivatives of id-transition elements in the series from Cr to Cu [6]. In the 1980s Mehrotra et al. have described the homologous series of Ni(OR)2 — from methoxide to r-hexyloxide [99], and also Co(OR)2, where R = Me,Et, Pr [1108]. On the alkoxylation of CoH(N2)(PPh3)3 by esters, phenol, or fluorinated ketones, Hayashi et al. [720] have obtained a series of tetrahedral [Co (OR)(PPh3)3] complexes. 

A special role in the chemistry of nickel and cobalt alkoxide derivatives is played by the poorly soluble methoxide halids studied in detail by the group of Winter [964, 865]. According to the diffuse reflectance spectra, the coordina-... 

Fithium tetrahydroaluminate, Fluoroamides, 0075 Lithium tetrahydroaluminate, Water, 0075 Lithium, 1,2-Diaminoethane, Tetralin, 4675 Magnesium, Barium carbonate, Water, 4685 Maleic anhydride, Bases, or Cations, 1400 Mercaptoacetonitrile, 0763 t Methanol, Hydrogen, Raney nickel catalyst, 0482 4-Methoxy-3-nitrobenzoyl chloride, 2911 Methoxyacetyl chloride, 1161 t Methyl formate, Methanol, Sodium methoxide, 0830 3-Methyl-2-penten-4-yn-l-ol, 2378 Nitric acid, 4430... 

In another experiment, glass wool was added to the hydrolyzed magnesium methoxide gel prior to heating in the autoclave. The quartz wool coated with high-surface-area magnesium oxide was impregnated with nickel nitrate hexahydrate and activated as already described. 

Iodo-desoxy derivatives of methylene, benzylidene and isopropylidene compounds have been transformed into their desoxy analogues with Raney nickel and hydrogen in basic media (e.g. hydroxides, methoxides and diethylamine). 0 47,60,81,82 Under similar conditions, l,3 2,4-diben-zylidene-5,6-sorbitoleen has been hydrogenated 8 and 2,4-benzylidene-6-nitro-6-desoxy-D-sorbitol has been converted into the corresponding amine.84 We are not aware of any report in this field of the removal of a benzylidene group by Raney nickel, as is the case with certain sugar derivatives.88... 

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