Diphosphine bridge

Figure 3.47 The dimeric diphosphine-bridged complex [Pd Ph2P(CH2)6PPh2 Cl2]2.

It is also possible for the anion to coordinate in similar complexes to give three-coordinate gold(I) centres in (41)371-373 in which the diphosphines bridge between gold(I) centres, or in (39) and (42) in which the diphosphines chelate.356,374 In the binuclear complex (41a) the AuAu separation is only 296 pm.371... 

Photosubstitution of diphosphine-bridged bimetallic complexes utilizes 1,2-trans-bis-diphenylphosphinoethylene as the bridging ligand and yields only /ram-substituted... 

Dist. let. pyr. dimeric with diphosphine bridge p-PMe2 Dist. trig, bipyr., NO (slightly bent) equatorial another isomer detected in solid and soln. 

An increasing area of interest and utilization of metal-metal bonded complexes is the area of electrical conduction at the molecular level. A prototypical complex is shown in Figure 1, which incorporates a diphosphine-bridged Pt -Pt dimer sphced to two linear acetylenic linkages terminated by ferrocenyl see Ferrocene) groups as endcaps. 

Diphosphine-bridged Cu and Ag isocyanide polymeric complexes 57 are luminescent in the solid state [114]. This was proposed to arise from an MLCT excited state (d10 metal to both CNR and phosphine n systems). The properties of these polymers... 

Extrusion of carbon monoxide, as shown in reaction 9, has been seen from a few diphosphine bridged metal complexes. This sort of reaction is also found when simple metal carbonyls condense to form polynuclear clusters (e.g., the conversion of Fe(CO)s to Fe2(CO)9). In electron-counting terms, all of the examples available involve loss of carbon monoxide from two 18-electron centers. If a metal-metal bond is accepted as part of the... 

A number of low-valent, diphosphine bridged dimers undergo oxidative addition of conventional substrates, such as the halogens according to reaction 13. 

Hydrogenation and Hydroformyiation Reactions Using Binuciear Diphosphine-Bridged Compiexes of Rhodium... 

The structures of binuclear, diphosphine-bridged complexes of various metals, including rhodium, are discussed in more detail in Chapter 5. 

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