Allenyl complexes binuclear

Selected H NMR Data for Allenyl-Bridged Binuclear Complexes... 

Fig. 23) to give an allenyl complex this reacts with CH3OH forming a binuclear structure comparable with that of Fe2(CO)6(C2Et2COO).l ... 

The binuclear allenyl complexes [M2(CO)6(lt-PPh2)( X-Ti tl2p,y-C(Ph)=C=CH2)] (M = Ru, Os), obtained from the reaction of [M2(CO)6(lt-PPh2)( 4- n n -C CPh)] with diazomethane have been shown to have unprecedented structures in which Ca is a-bonded to one metal site while the Cp-Cy double bond is coordinated to the second metal. Reactions of the product were... 

The reactivity of the multisite-bound allenyl unit is an area of rapid growth. This fragment exhibits a variety of bonding types. Most common for binuclear complexes are the and interactions, whereas... 

Reactions of platinum-allenyl derivatives (5), the transformations of 7] -propargyl and t) -allenyl ligands into 7] -hydroxyallyls on mono- and binuclear complexes (6), the cyclization of diynes via metal-allenyl intermediates (7), and the oxidation of [Pt(Br)(PPh3)2(i) -CH=C=CMe2)] to [Pt(Br)(PPh3)2 i9 -C=CMe2(OOH) ] (8) have also been described. 

Finally, nucleophilic addition of alcohols at the a carbon of allenyls coordinated on binuclear, phosphido-bridged, iron complexes followed by insertion of a carbonyl, leads to coordinated unsaturated esters (Fig. 11). 

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