ISSN:
1434-1948
Keywords:
1,3,5-Triphosphabicyclo[3.1.0]hexene-η3,η1-diyl hafnium complexes
;
1,3,5-Triphosphabicyclo[3.1.0]hexene
;
1,3,5-Triphosphacyclohexa-1,4-diene
;
Cyclotrimerization
;
Phosphaalkyne
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
It is shown that the (P≡C-tBu)3 ligand found in the hafnium complex (COT)Hf(P≡C-tBu)35 (COT = cyclooctatetraene), which we reported recently,[3] is also present in the new hafnium complex 12, prepared by reaction of hexachloroethane with complex 5 in pentane, as well as in its trimethylphosphane adduct 14. The structures of complexes 12 and 14 have been determined by X-ray crystallography and that of 5by comparing its 1H-, 13C-, and 31P-NMR spectra with those of the complexes 12and 14. The organophosphorus ligand in all three complexes is a 2,4,6-tri-tert-butyl-1,3,5-triphosphabicyclo[3.1.0]hexene-η3,η1-diyl. Hydrolysis of complexes 5 and 12 with water gives the new phosphorus heterocycle 15, whereas the new heterocycles 16 and 17 are formed in an approximately 1:1 mixture using either silica gel containing 2% H2O or Na2SO4 · 10 H2O.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
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