High-nuclearity carbonyl clusters syntheses

High molecular weight synthetic alkylated aromatic feedstocks, 23 533 High nuclearity carbonyl clusters, 16 64-66 High nuclearity metal carbonyl synthesis, 16 66-69 from salts, 16 68 from smaller carbonyls, 16 68-69 High ortho novolacs... 

High-Nuclearity Carbonyl Clusters Their Synthesis and Reactivity Maria D. Vargas and J. Nicola Nicholls... 

M. D. Vargas, and J. N. Nicholls, High-Nuclearity Carbonyl Clusters Their Synthesis and Reactivity, Adv. Inorg. Chem. Radiochem. 30, 123-222 (1986). 

HIGH-NUCLEARITY CARBONYL CLUSTERS THEIR SYNTHESIS AND REACTIVITY... 

In the synthesis of high nuclearity carbonyl clusters, small clusters are often used as starting materials ... 

In 1962, Dahl had also structurally characterized Fej(CO)i5C, the first high nuclearity carbide (26). This compound was originally prepared in extremely low yields (0.5%) by the reaction of Fe3(CO)i2 with substituted acetylenes, and, probably due to the peculiarity of this synthesis, was considered for some time much more a curiosity rather than being recognized as the precursor of today s large family of carbide-carbonyl clusters. 

Finally, cobalt carbide-carbonyl clusters have recently been isolated through a two-step synthesis. First of all, the well-known Co3(CO)9CCl is prepared from Co2(CO)8 and CCh, and then the hexanuclear carbide dianion [Co6(CO)i5C]2- is obtained in good yields (9) by further reaction with Xa[(, o(CO)4] in diisopropylether [see Eqs. (18) and (19)]. Further redox condensation between [Oo6(CO)i5C]2-and Co4(CO)i2 [see Eq. (11)] gives the square antiprismatic octanuclear cluster [Cdo8(Cdt )i8 C]2- (13). Both these carbide derivatives, as well as all of the other cobalt high nuclearity clusters, are sensitive to air and react with carbon monoxide at atmospheric pressure. 

Carbonylation of different palladium complexes, often in the presence of phosphines, led to the synthesis of a variety of clusters including halocarbonyl clusters of unknown nucle-arity [PdX(CO)] (X = Cl, Br), and phosphine-carbonyl clusters from tetrameric [Pd4(CO)s(PR3)4] to high nuclear-ity compounds such as [Pd38(/r -CO)4(/u. -CO)24(PEt3)i2]. From these preformed clusters, nanosized cluster compounds of higher nuclearity such as [Pd69(CO)36(PEt3)ig] can be prepared. ... 

Not only fragmentation but also cluster formation can be observed. For example, polynuclear Pt carbonyls can be formed from Pt-t-phosphine complexes under CO pressure . A review on the synthesis of high nuclearity clusters, including reactions of CO with various complexes has appeared . 

Synthesis of poly-aurated high nuclearity osmium carbonyl clusters... 

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