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Iron group, phosphido-bridged

In this chapter we wish to focus on the synthesis, structural chemistry, and reactivity of some iron-group phosphido-bridged carbonyl clusters containing sideways-bound acetylides. The role of the PR2 group here is as a stable, unreactive, but flexible bridging coligand which facilitates exploitation of the unusual reactivity patterns for these /a2-7 2- and /Lt3-rj2-bound hydrocarbyl groups. [Pg.168]

The bridging phosphide group in bimetallic transition metal complexes appeared to participate in a transformation, rather than behave as an inert spectator ligand. This is particularly obvious in homobimetallic iron and cobalt systems.Mays et al. showed that the reactions of iron-cobalt phosphido-bridged complex 25 with both symmetrical and unsymmetrical alkynes gave five-membered ferracycle-containing compounds, such as 26, in which a CO and an alkyne were inserted regiospecifically into a Co-P bond in 25. Subsequent decarbonylation led to a set of four-membered ferracyclic species 27-30 in low yields. [Pg.328]

CARTY Phosphido-Bridged Iron Group Clusters... [Pg.167]

Table II. P-31 NMR Parameters for Phosphinoacetylene and Phosphido-Bridged Iron-Group Complexes... Table II. P-31 NMR Parameters for Phosphinoacetylene and Phosphido-Bridged Iron-Group Complexes...
Trends and Implications of P-31 NMR Parameters. With X-ray structural data now available in our laboratory for a large number of bi-and polynuclear iron-group carbonyl complexes with phosphido bridges, we have attempted to correlate structural changes with P-31 NMR chemical shifts and coupling constants in an effort to establish... [Pg.182]

The use of Me3NO to induce substitution of dppm (bis(diphenylphosphino)-methane) for CO molecules on dinuclear iron complexes led to insertion of CO into C-C bonds of alkyne-derived metallacycles. Similar behavior was observed when [PPNJCl salts were used to favor the formation of alkyne-substituted triruthenium dppm-containing clusters.I This behavior should be compared with the insertion of CO into allenylidene and phosphido-bridging ligands occurring when dppm coordinates to binuclear ruthenium complexes as shown in Fig. 3. This reaction is a nucleophilic attack of the coordinated allenylidene and phosphido groups on a coordinated CO (see Section 2.8.2.2). [Pg.800]


See other pages where Iron group, phosphido-bridged is mentioned: [Pg.165]    [Pg.165]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.175]    [Pg.177]    [Pg.184]    [Pg.238]    [Pg.561]    [Pg.166]    [Pg.157]    [Pg.1061]    [Pg.185]    [Pg.176]    [Pg.269]   


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Bridge groups

Bridging group

Bridging phosphido group

Iron Bridge

Iron group

Phosphido bridged

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