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Organometallic chemistry, fluorinated

Also in the divalent state, Pd and Pt show the class-b characteristic of preferring CN and ligands with nitrogen or heavy donor atoms rather than oxygen or fluorine. Platinum(IV) by contrast is more nearly class-a in character and is frequently reduced to Pt by P- and Aj-donor ligands. The organometallic chemistry of these metals is rich and varied and that involving unsaturated hydrocarbons is the most familiar of its type. [Pg.1149]

Transition metal complexes containing fluorinated ligands date back to the initial explosive development of organometallic chemistry in the period from 1950 to 1970, and some early reviews contain a great deal of useful and relevant information (3,6,7). Early work clearly established that these compounds do indeed exhibit dramatically different structural, bonding, and chemical... [Pg.184]

Current developments in the area of fluorine containing organometallic compounds are surveyed annually in Abel, E. W., and Stone, F. G. A., "Organometallic Chemistry. Chemical Society. London. [Pg.313]

Perhaps the most exciting recent advances in the organometallic chemistry of fluorocarbons have been the contemporaneous and complementary discoveries of examples of catalytic activation and functionalization of perfluorocarbons in laboratories led by Crabtree and Richmond [23]. Kiplinger and Richmond [64] showed that Group 4 metallocenes function as catalysts in the synthesis of per-fluoronapthalene from perfluorodecalin using activated Mg or Al as the terminal reductant. Low valent zirconocene or titanocene species were postulated as intermediates in the catalytic cycle and control experiments showed the central role played by the metallocene in mediating electron transfer in these systems. Turnover numbers up to 12 (net removal of 120 fluorines/metallocene) were noted [64]. [Pg.261]

Concerning the organometallic chemistry of olefin insertion,it is now clear that in most cases the active catalytic species for olefin polymerization are coordinatively unsaturated metal alkyls of the formula [L M—P]+[A], where P is a polymer chain, and A is a weakly coordinating anion. Many convenient methods for generating these species are now available among the most used are reaction of a metal dihalide [L MX2] with MAO or the reaction of a metal dialkyl [L MR2] with either fluorinated boranes, borate salts,or aluminate salts. ... [Pg.229]

In conjunction with the work being done on fluorous biphasic systems, the development of fluorinated ligands has also made an impact in the area of supercritical carbon dioxide (SCCO2) catalysis. Supercritical CO2 has been heavily studied as a reaction medium for organometallic chemistry due to its unique properties. Its... [Pg.82]

Obviously, the majority of the efficient methods for fluorinated furans synthesis has been described over the last 20 years. The development of modem fluorinating agents, organometallic chemistry, and homogeneous catalysis provided new possibilities for the preparation of flnoro- and perfluoroalkylfurans, which find then-application in pharmacology, agriculture, and material science. [Pg.222]

Furuyama, R., Saito, J., Ishii, S.etal. (2005b) Fluorinated bis(phenoxy-imine) Ti complexes with MAO Remarkable catalysts for living ethylene and syndioselective living propylene polymerization. Journal of Organometallic Chemistry, 690,4398 1413. [Pg.307]

Varian Associates recently re-examined this compound, and were able to detect a slight splitting characteristic of an AB pattern in the )3-fluorine resonance as well. (See No. 81 in the NMR at Work Series, Varian Assoc., Palo Alto, Calif, and Fig. 2 in the chapter by Treichel and Stone in Volume 1 of Advances in Organometallic Chemistry.)... [Pg.35]

As a result of the efforts of many chemists during the last two or three years fluorocarbon derivatives of metals have been described in ever increasing numbers, so that it can now be reasonably said that their study forms an important subarea both of fluorine chemistry and of organometallic chemistry. As anticipated by the early work 1-4), the new compounds display novel properties and reactions in comparison with those of their hydrocarbon... [Pg.144]

A quite surprising development, even to experienced workers in elemental-fluorine chemistry, has been the synthesis of trifluoromethyl organometallic compounds by direct fluorination of metal alkyls (25). Even more surprising is the fact that, for certain metal and metalloid systems, such as the reaction of elemental fluorine with tetramethyl-germane, this t5rpe of low-temperature synthesis is a practical method 26) for the laboratory preparation of the perfluoro analog. [Pg.197]


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Organometallic chemistry

Organometallic fluorinated

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