By Robert West, Anthony F. Hill
Just about all branches of chemistry and fabric technology 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 brief life at ambient temperatures to species that are thermally very sturdy. This greatly acclaimed serial comprises authoritative reports that handle all facets of organometallic chemistry, a box which has elevated greatly because the book of quantity 1 in 1964.
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Additional resources for Advances in Organometallic Chemistry, Vol. 48
Cleavage of dimeric complexes. Nucleophilic NHCs can cleave dimeric complexes with bridging ligands like halides, carbon monoxide, or acetonitrile. Examples for this type of complex formation are the reactions of [(η4-cod)MCl]2 or [(η5-C5Me5)MCl2]2 (M = Rh, Ir) with free NHCs [Eq. t. 154 The coordination of just one NHC is complementary to the reaction of the solvent adduct [(thf)2TiCl4] with two NHC ligands (vide infra). 156 [(tmp)2Yb]n was cleaved by one NHC (tmp = tetramethylphospholyl) [Eq.
In summary, almost every transition metal has been used to prepare NHC complexes by one of the routes described previously. C. , in homogeneous catalysis, since the profound understanding of these properties certainly helped in predicting their behavior in these applications. The results obtained from various analytical methods can be summarized as follows. The character of the metal–carbon bond is described best as a strong σ -bond. The length of the metal–carbon bond is usually in the range of a typical metal– hydrocarbyl single bond and π-backbonding is considered to be negligible.
In all these cases certain requirements for the metal, the complex precursor or the NHC itself, have limited the approach and have prevented broader applications. a. Vapor phase synthesis. In the case of sublimable NHCs the vapor deposition method can lead to the formation of desired complexes. 219 b. The metalla-Ugi reaction. The isolobal analogy of oxygen and a d6-transition metal complex fragment ML5 is the idea behind the application of the Ugi-4component condensation for hydantoins in transition metal complex synthesis:220 Anionic cyano complexes are reacted with an aldehyde, an isocyanide, and an ammonium salt to form the desired NHC complexes [Eq.
Advances in Organometallic Chemistry, Vol. 48 by Robert West, Anthony F. Hill