ISSN:
0009-2940
Keywords:
Titanocene complexes
;
Zirkonocene complexes
;
Phosphaacetylene complexes
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
η2-tert-Butylphosphaacetylene Complexes of Titanocene and Zirconocene(η2-2-tert-Butyl-1-phosphaacetylene)(trimethylphosphane) complexes of titanocene (5a) and zirconocene (5b) are obtained in 85 and 73% yield, resp., by the reaction of 2-tert-butyl-1-phosphaacetylene (1) with the corresponding bis(trimethylphosphane)metallocenes 2a (M=Ti) and 2b (M=Zr). For the preparation of 5b it is more convenient to start with the (1-butene)zirconocene complex 3 or with the tolanezirconocene complex 4. With the help of a suitable Lewis-acid, e.g. triethylborane, trimethylphosphane can be eliminated from 5a or 5b to yield the new coordinatively unsaturated phosphaalkyne metallocenes 6a (M=Ti) and 6b (M=Zr), which are unstable and oligomerize easily to the dimer 7 (M=Ti) and trimer 8 (M=Zr); only the monomer 6a can be observed in solution. The crystal structures of 5a, 7, and 8 are determined by X-ray analyses.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19901230805
