By Robert West, Anthony F. Hill
Just about all branches of chemistry and fabric technological know-how now interface with organometallic chemistry-the research of compounds containing carbon-metal bonds. Organometallic compounds diversity from species that are so reactive that they simply have a temporary lifestyles at ambient temperatures to species that are thermally very solid. This greatly acclaimed serial comprises authoritative reports that tackle all features of organometallic chemistry, a box which has improved significantly because the book of quantity 1 in 1964.
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Extra resources for Advances in Organometallic Chemistry, Vol. 48
97 Because of the high molecular weight the amount of precatalyst actually participating in the polymerization reaction is considered to be very low. 358 Generally, similar results as for the analogous phosphine complexes are obtained. 156 Polymerizations based on oleﬁn metathesis that are catalyzed by ruthenium–NHC complexes are discussed separately (vide supra). 5. Cyclopropanation of Olefins Rhodium(I) and ruthenium(II) complexes containing NHCs with hemilabile ether moieties were successfully applied as catalysts for the cyclopropanation of oleﬁns with diazoalkanes [Eq.
Cleavage of tetraaminoethylenes has been most frequently used in the preparation of imidazolidin-2-ylidene complexes. , ligand transfer from one metal to another, seems to be a simple alternative for the preparation of complexes, which have not yet been accessible. In particular, silver(I)–NHC complexes are convenient transfer agents. This method is likely to become more important for NHC complex synthesis in the future. Rather exotic methods like vapor phase, multicomponent, and template syntheses are considered to be important in cases where the other ways failed.
In carbonyl complexes like Cr(CO)6, Mo(CO)6, W(CO)6, Fe(CO)5, or Ni(CO)4 one or two carbon monoxide molecules can be 23 Metal Complexes of Stable Carbenes thermally substituted by NHC ligands [Eq. 155 In the latter complex a β-agostic interaction of the ytterbium metal center with the Si–H bond is observed. 128 Metals in high oxidation states can also be subjected to the replacement of solvent molecules. 172 Oleﬁns like 1,5-cyclooctadiene can be subjected to ligand exchange if no other ligands can be replaced (vide supra).