Anionic tantalum(V) bis(dicarbollide) complexes with bent-metallocene structures
- Univ. of Iowa, Iowa City, IA (United States)
Bis(dicarbollide) complexes {eta}{sup 5}-C{sub 2}B{sub 9}H{sub 11}){sub 2}M which adopt ferrocene-type metallocene structures are well known. However, ({eta}{sup 5}-C{sub 2}B{sub 9}H{sub 11}){sub 2}MX{sub n} species with bent metallocene structures are comparitively rare and are limited to the f-block metals. Key examples include Raymond`s dianionic U(IV) complex ({eta}{sup 5}-C{sub 2}B{sub 9}H{sub 11}){sub 2}UCl{sub 2}{sup 2-2} and a series of lanthanide complexes ({eta}{sup 5}-C{sub 2}B{sub 9}H{sub 11}){sub 2}Ln(THF){sup n-} (n = 2, Y; n = 1, Zr, Hf) complexes which adopt bent-metallocene structures. For several years, the authors have been investigating the possibility of exploiting carborane ligands in the construction of electrophilic early transition metal alkyl systems, and they have reported on a series of mixed-ring bent-metallocene (C{sub 5}-Me{sub 5})(C{sub 2}B{sub 9}H{sub 11})M(R) (M = Zr, Hf) and (C{sub 5}H{sub 4}R)(C{sub 2}B{sub 9}H{sub 11})TaX{sub 2} (R = H, Me) species. During the course of this work, the authors prepared a series of anionic tantalum (V) bis(dicarbollide) complexes, ({eta}{sup 5}-C{sub 2}B{sub 9}H{sub 11}){sub 2}TaX{sub 2}- (X = C1 (1), Me (2), F (3)), which adopt bent-metallocene structures. The synthesis and characterization of these compounds are discussed in this contribution.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-88ER13935
- OSTI ID:
- 459475
- Journal Information:
- Inorganic Chemistry, Vol. 33, Issue 19; Other Information: PBD: 14 Sep 1994
- Country of Publication:
- United States
- Language:
- English
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