Nitrile isonitrile

CH3)3Si)2N]2U(CH2Si((CH3)2)N(Si(CH3)3)) Generally, uranium metaUacycles are quite reactive inserting a host of organics, ie, CO, secondary amines, nitriles, isonitriles, aldehydes, ketones, and alcohols. 

Ligand A anionic (e.g., halides, pseudohalides, alkyl, aryl, thiolate, alkoxide) ligand N neutral (e.g., amines, imines, phosphines, carbenes, nitriles, isonitriles, NO, CO) ligand C cationic (e.g., NO+)... 

Cp Sm 59 (it can be regarded as a vinylsamarium when a Cp coordinates Sm in an -fashion) is an extremely crowded molecule, which displays high reactivity with substrates including CO, nitriles, isonitriles and isocyanates.31 The reactions proceed according to Scheme 20. 

Heteroatom nucleophiles react with pyridine in its neutral or activated pyridinium form. When the nitrogen has been fluorinated, the product of nitrile/isonitrile addition is an imidazopyridine <2005TL4487> (Equation 77). 

Under VI we find that hydrogen chloride does add reversibly and stoichiometrically to hydrocyanic acid, but not to give pentavalent nitrogen. It forms amino-formyl chloride, H2C(C1) NH. This substance would undoubtedly add hydrogen chloride to the nitrogen if it did not polymerize. The polymerization products of the nitriles, isonitriles, cyanates and isocyanates have not been studied with any satisfactory degree of care. 

HFA and cyanotrimethylsilane react stoichiometrically with formation of the substituted cyanhydrin 9 (775). Increasing the molar ratio of the reactants to 4 1 yields, in addition to 9, compound 10, with nitrile-isonitrile equilibrium competing with direct attack of HFA (242). The five-membered ring is also formed in the reaction of organic iso-nitriles with HFA (188). The same structural feature in addition to insertion has been found when triethylamine is present as a catalyst, as well as minor amounts of 9 (83, 242). 

Cp 3Nd reduces Ph3P=Se to PhsP forming Cp 2Nd 2(M-rf- rf--SQ2) (equation 16). Cp 3Sm reacts with a variety of substrates including CO, THF, ethylene, hydrogen, nitriles, isonitriles, isocyanates, cyclooctatetraene, azobenzene, and Ph3P=E (E = O, S, Se). Depending on the substrate, Cp 3Sm can react either as a bulky alkyl complex Cp 2SmR with R = Ji -CsMes or as zwitterionic [Cp 2Sm]+ [Cp ] with the [Cp ] anion as the one-electron reductant. 

Beside classical Zr P bond cleavage with the release of the corresponding phosphane, ketones, aldehydes, nitriles, isonitriles, and epoxides have been inserted into the Zr-P bonds of fom- or five-membered phosphazirconacycles leading to ring expansion. For example, the equation (7) shows the insertion of acetonitrile in a triphosphanato complex affording an unsymmetrical six-membered ring complex. ... 

An important, but not widely recognized effect in electron transfer chemistry is the phenomenon that the thermochemical stability order of several tautomeric systems can be inverted upon one-electron oxidation. Hitherto, most of the data stem from gas-phase measurements (photoelectron and mass spectrometry data) or from calculations at several levels of theory (Table 2). While the explicit numbers still differ for each method they all agree on the inversion of the stability order for keto/enol, alkine/allene, imine/enamine, nitrile/isonitrile and aldimine/aminocarbene pairs. One-electron reduction, on the other hand, does not necessarily lead to a thermochemical stability inversion, as demonstrated in the case of acetaldehyde 7cthenol [41]. 

Hydrolysis yields final reduction products Reaction mixtures containing Mo salts and sulfur ligands, in aqueous base, with NaBH as the reducing agent, when treated with nitriles, isonitriles or [CN] react to produce hydrocarbons (CH, CjHj, etc.) in reactions of undetermined stoichiometry ... 

The chemistry of 2 and 3 has been investigated over the past ten years. Thus, for example, reactions of these species with nitriles, isonitriles, ketones, 1,4-dihetero-1,3-dienes, and many other multiple bond systems have been realized [2], However, the important groups of the alkenes and 1,3-dienes were missing from this series. The objective of the present work was to rectify this omission. 

Of particular preparative value is the observation that ambident anion alkylations, by appropriate choice of reaction conditions, may be manipulated to operate preferentially in one direction. The results of Guillemard s classical work in this area have been reviewed by Kurtz. Although most of the modem investigations do not deal in particular with the nitrile/isonitrile problem, the following rules can be summarized. 

From nitriles, isonitriles, ketene imines, carbodiimides and cyanamides 546... 

Non-carbonyl Ligands with Multiple Bonds Nitrosyls, Cyanides, Nitriles, Isonitriles, Thiocyanates 784... 

Nitrile, Isonitrile, and Alkyne Analogs. Exploration of N2ase-catalyzed reductions of selected nitrile, isonitrile, and alkyne analogs provides examples of novel chemical reactions and yields information about the topography of the active sites of Noase. 

Nitriles, Isonitriles, Oximes, and Hydroxylamines Hydrazones, Osazones, and Derived Heterocycles Other Heterocyclic Derivatives... 

The cyanide ion is C, N-ambident. Alkali cyanides are extensively used in effecting transformation of alkyl halides into nitriles. Isonitrile formation is promoted by using Ag which polarizes the C-halogen bond rendering it more ionic (harder). 

Earlier work [151] showed that at high temperature, isonitriles isomerize into nitriles. Isonitriles have recently [152] been isomerized at much lower temperatures by reacting them with alkyl lithium or Grignard reagents. Ketones are simultaneously formed in amounts which vary with the structure of the alkyl—... 

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