Organometallic compounds derivatives

Recently, stable organometallic compounds derived from Ni(acac)2 have been described. The square planar compounds [Ni(acac)(PR3)L] (R = Ph, Cy L = Me, Et) were obtained by reacting Ni(acac)2 and PR3 in ether at -20 °C with either diethyl- or dimethyl-aluminum monoethoxide.1546,1547,1577 [Ni(acac)(Me)PPh3] reacts with diphenylacetylene at room temperature, according to equation (183).1578... 

The oxyfluorinated polymers would be expected to react with a variety of organic, inorganic, and organometallic compounds. Derivatives of each functionalized material have been prepared with CH3OH, C2HsOH, n-BuOH, and aniline. The efficiency of the derivativization process ranged from 44 to 98%. 

A very remarkable series of organometallic compounds, derived principally from the hydrocarbon cyclopentadiene, (III), and having sandwichlike structures, was first synthesized in the 1950 s, chiefly by G. Wilkinson. The first member of the series, ferrocene (biscyeiopentadienyl-iron), abbreviated Fe(cpd)2, may be made by heating cyclopentadiene... 

It is known from the work of Morton, on polymerization with Alfin catalysts, that the inorganic constituent of the catalysts (NaCl) plays an important part in the special effectiveness of these initiators. Hence, the question had to be examined if, likewise, the presence of inorganic substances is necessary for stereospecific polymerization with organosodium and -potassium compounds. As a result, it has been established that all the organometallic compounds derived as indicated in the above preparative methods facilitate the stereospecific polymerization of styrene in n-heptane. In addition, the nature and chain length of the residue R have no significant influence on the initiators. In fact, R can be linear or branched or aryl-aliphatic. Also, phenyl or triphenylmethylsodium yields isotactic polystyrene. 

A review on the developments in Pd-catalysed oxidative Heck reactions of organometallic compounds with alkenes emphasized that organometallic compounds derived from Group HI to Group VI are efficient substrates for the oxidative Heck reaction. The article discussed the mechanisms of several such studies. ... 

The most general synthetic route to ketones uses the reaction of carboxylic acids (or their derivatives) or nitriles with organometallic compounds (M.J. Jorgenson, 1970). Lithium car-boxylates react with organolithium compounds to give stable gem-diolates, which are decom-... 

Organometallic compounds are named as substituted derivatives of metals The metal is the parent and the attached alkyl groups are identified by the appropriate prefix... 

A large number of organometallic compounds are based on transition metals Examples include organic derivatives of iron nickel chromium platinum and rhodium Many important industrial processes are catalyzed by transition metals or their complexes Before we look at these processes a few words about the structures of transition metal complexes are m order... 

Organometallic compounds contain a carbon-metal bond They are named as alkyl (or aryl) derivatives of metals... 

Zirconium tetrachloride is instantly hydrolyzed in water to zirconium oxide dichloride octahydrate [13520-92-8]. Zirconium tetrachloride exchanges chlorine for 0x0 bonds in the reaction with hydroxylic ligands, forming alkoxides from alcohols (see Alkoxides, METAl). Zirconium tetrachloride combines with many Lewis bases such as dimethyl sulfoxide, phosphoms oxychloride and amines including ammonia, ethers, and ketones. The zirconium organometalLic compounds ate all derived from zirconium tetrachloride. 

Similarly, 1-alkylpyrroles, indoles, furans, thiophenes [60], a-picoline [61], enols, malonates [76], and organometallic compounds [56, 62] react with acyl imines of trifluoropyruvates to give derivatives of a-trifluoromethyl a-amino acids... 

Section 14.15 Coordination polymerization of ethylene and propene has the biggest economic impact of any organic chemical process. Ziegler-Natta polymerization is canied out using catalysts derived from transition metals such as titanium and zirconium. ir-Bonded and a-bonded organometallic compounds aie intennediates in coordination polymerization. 

It is notable that the preparation of alkyl and aryl derivatives from Pb starting materials always results in Pb organometallic compounds. The only well-defined examples of Ptf ... 

Organometallic derivatives M2R4 are rather more stable than the hydrides and, indeed, dicacodyl, Me2AsAsMc2, was one of the very first organometallic compounds to be made... 

With rare exceptions, such as [Fe(bipy)3]°, oxidation states lower than +2 are represented only by carbonyls, phosphines, and their derivatives. These will be considered together with other organometallic compounds in Section 25.3.6. 

Organometallic Compounds of Chalcogenoazoles and Their Benzannulated Derivatives... 

C. Reaction of Organometallic Compounds with Sulphurous Add Derivatives 257... 

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