F,
CRelevant articles and documents
All total 27 Articles be found
All total 27 Articles be foundLow-Temperature Reactions of Metal Atoms with Methyl Bromide
Tanaka, Yasutaka,Davis, Stephen C.,Klabunde, Kenneth J.
, p. 1013 - 1016 (1982)
The atoms of a series of metals were codeposited with CH3Br under matrix conditions (argon diluent at 12 K and pure CH3Br at 77 K).Oxidative addition of CH3Br to Fe, Co, Ni, and Pd did not occur upon simple codeposition or upon matrix photolysis, which is rationalized by the formation of a favored CH3Br-M complex.Cu, Ag, and Au behaved similary.Main-group metals Mg, Al, Ga, and In did react to form CH3MBr whereas Zn, Tl, Ge, Sn, and Pb did not.For the group 1B - 4B (Cu, Zn, B, C) families the most important reactivity parameter is a low ionization potential.However, a high heat of vaporization of the element also has a positive effect on reactivity.In the case of Mg, clusters may be necessary for high reactivity.
Cross-coupling of aryl/alkenyl silyl ethers with grignard reagents through nickel-catalyzed CO bond activation
Zhao, Fei,Yu, Da-Gang,Zhu, Ru-Yi,Xi, Zhenfeng,Shi, Zhang-Jie
supporting information; experimental part, p. 1001 - 1003 (2011/12/05)
CO activation and its application have drawn much attention since oxygen-based electrophiles are easily available, less toxic, and more environmentally benign. This letter presents systematically results on the Ni-catalyzed KumadaTamaoCorriu coupling based on siloxy arenes/alkenes, which provides a new strategy of silyl protection/CC bond formation sequence in organic synthesis.
Interior surface modifications of molecular sieves with organometallic reagents and the use thereof for the conversion of oxygenates to olefins
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, (2008/06/13)
A method for making an organometallic treated molecular sieve is described in which a molecular sieve having at least one hydroxyl group and at least [AlO2] and [PO2] tetrahedral units and having an average pore dimension less than or equal to about 5? is contacted with a solution comprising an organometallic compound and a non-proton donating solvent. The resulting organometallic treated molecular sieve has enhanced ethylene and/or propylene selectivity when used in the conversion of organic oxygenates to olefins. The ethylene and/or propylene selectivity, as well as catalyst life, are further enhanced when the resulting organometallic treated molecular sieve is combined with an oxide of at least one metal selected from Groups 2, 3 and Group 4 of the Periodic Table.
