Abstract
Transfer reagents are useful tools in chemistry to access metastable compounds. The reaction of [Cp '' 2ZrCl2] with KSb(SiMe3)(2) leads to the formation of the novel polyantimony triple decker complex [(Cp '' Zr)(2)(mu,eta(1:1:1:1:1:1)-Sb-6)] (1, Cp '' = 1,3-di-tertbutyl-cyclopentadienyl), containing a chair-like Sb-6(6-) ligand. Compound 1 represents a valuable transfer reagent to form novel ...
Abstract
Transfer reagents are useful tools in chemistry to access metastable compounds. The reaction of [Cp '' 2ZrCl2] with KSb(SiMe3)(2) leads to the formation of the novel polyantimony triple decker complex [(Cp '' Zr)(2)(mu,eta(1:1:1:1:1:1)-Sb-6)] (1, Cp '' = 1,3-di-tertbutyl-cyclopentadienyl), containing a chair-like Sb-6(6-) ligand. Compound 1 represents a valuable transfer reagent to form novel antimony ligand complexes. Thus, the reaction of 1 with Cp(R)-substituted transition metal halides of nickel, cobalt and iron leads to the formation of a variety of novel Sb-n ligand complexes, such as the cubane-like compounds [(Cp ''' Ni)(4)(mu(3)-Sb)(4)] (2) and [(Cp ''' Co)(4)(mu(3)-Sb-4)] (3a) or the complexes [((CpCo)-Co-Bn)(3)(mu(3)-Sb)(2)] (4) and [(Cp ''' Fe)(3)(mu(3)-Sb)(2)] (5), representing a trigonal bipyramidal structure. Moreover, beside the transfer of Sb-1 units, also the complete entity can be transferred as seen in the iron complex [(Cp ''' Fe)(3)(mu(3,)eta(4:4:4)-Sb-6)] (6). DFT calculations shed light on the bonding situation of the products.
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