Journal article
Synthesis and characterization of tantalum(V) dicarbollide complexes
Organometallics, Vol.11(9), pp.3098-3104
09/01/1992
DOI: 10.1021/om00045a026
Abstract
Reaction of TaCl5 with Li2C2B9H11 in toluene yields (C2B9H11)TaCl3 (1). Molecular weight measurements for 1 indicate a monomeric structure in benzene solution. X-ray diffraction reveals a distorted-octahedral/three-legged piano-stool structure for 1. Data for 1: a = 6.84 (1) Å, b = 9.614 (2) Å, c = 19.073 (3) Å, β = 92.37 (3)°, V = 1252 (2) Å3, Z = 4 in space group P21/c. Reaction of 1 with TlCp′ (Cp′ = C5H4Me) in CH2Cl2 yields the bent metallocene Cp′(C2B9H11)TaCl2 (2). X-ray diffraction reveals a distorted-tetrahedral structure for 2, isostructural with group 4 metallocenes. Data for 2: a = 9.519 (4) Å, b = 12.752 (6) Å, c = 7.016 (2) Å, α = 97.16 (3)°, β = 109.76 (3)°, γ = 94.15 (4)°, V = 789 (1) Å3, Z = 2 in space group P1. Reaction of CpTaCl4 with Li2C2B9H11 yields Cp(C2B9H11)TaCl2 (3, Cp = C5H5). Alkylation of 1 with MeMgBr yields (C2B9H11)TaMe3 (4). Alkylation of 2 with MeMgBr yields Cp′(C2B9H11)TaMe2 (5).
Details
- Title: Subtitle
- Synthesis and characterization of tantalum(V) dicarbollide complexes
- Creators
- Roger UhrhammerDonna J CrowtherJeffrey D OlsonDale C SwensonRichard F Jordan
- Resource Type
- Journal article
- Publication Details
- Organometallics, Vol.11(9), pp.3098-3104
- Publisher
- American Chemical Society
- DOI
- 10.1021/om00045a026
- ISSN
- 0276-7333
- eISSN
- 1520-6041
- Language
- English
- Date published
- 09/01/1992
- Academic Unit
- Chemistry
- Record Identifier
- 9984622747202771
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