Hexadecker sandwiches

Me)Co(Et2C2B3H3)Pt(Et2C2B3H3)Co(Et2C2B3H3)CoCp Other Co(C2B3)-containing hexadecker sandwiches 85... 

Figure 5-22 Designed synthesis of hexadecker sandwich complexes from small building-block units.

Wang, X., Sabat, M., and Grimes, R. (1995). Organotransition-metal metallocarboranes. 44. construction of pentadecker and hexadecker sandwiches from triple-decker building blocks, J. Am. Chem. Soc. 117, 12227. 

The synthesis of a tricarbonyl cobalt 1,3-diborolyl complex has been reported. The same ligand features in symmetrical and unsymmetrical multidecker complexes of platinum with iron, cobalt and nickel and in the first reported hexadecker sandwich complex. Thia-dlborole complexes of nickel and cobalt have also... 

Covalently bonded sandwiches having five or six decks 78, 79 have been constructed via the reactions of C2B3-endcapped anions with transition metal cations 78,85 the hexadeckers vary in metal composition, in the nature of the substituents on boron (X), in the number of protonated metal centers, and in the number of electrons associated with the metals. Some of these complexes are diamagnetic, but most are paramagnetic with one or two unpaired electrons, in most cases extensively delocalized over the stack as shown by ESR and electrochemical studies.85... 

FIGURE 7 Structures of ferrocene (18), the related iron(ll) bisdicarbollide anion (19), and a hexadecker, mixed cyclopentadienyl/triboracyclopentadienyl pentametal sandwich complex (20). 

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