Homometallic complex

The bond lengths and angles of the TTF moiety are close to those reported for the noncoordinated neutral unit, indicating that organic molecule is neutral. The complexes reach the nanometric scale, the length of the molecules is equal to 38.25 A ( 4 nm). The shortest intermolecular S---S contacts are equal to 3.9768(35) A for homometallic complex and 3.9456(16) A for heterometallic. 

Rh s(CO)iis they revealed the presence of an unidentified complex which was suggested to be the previously unknown species Rh4(a-CO)i2-The BTEM protocol is an extremely powerful technique to recover pure component spectra of unknown species, even when present at very low concentrations. This was illustrated by a detailed mechanistic study of the promoting effect of HMn(CO)5 on the Rh4(CO)i2 catalyzed hydroformylation of 3,3-dimethylbut-l-ene [22], A dramatic increase in the hydroformylation rate was found when both metals were used simultaneously. Detailed in situ FTIR measurements using the BTEM protocol indicated the presence of homometallic complexes only during catalysis. The metal complexes that were identified under catalytic conditions were RC(0)Rh(C0)4, Rh4(CO)i2, Rh5(CO)i5, HMn(CO)s, and Mn2(CO)io (see Figure 6.6). The kinetics of product formation showed an overall product formation rate, Eq. (3) ... 

The application of this strategy to dinuclear complexes is briefly illustrated. If the target is the preparation of a dinuclear homometallic complex, the synthesis is... 

Fig. 20 Terminal ligands employed in binuclear homometallic complexes...

Such n6-oxo ligand bonding was also crystallographically established in an interesting homometallic complex [H4Ba6O(OCH2CH20Me)14] (372). 

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