ISSN:
0947-6539
Keywords:
bridging ligands
;
intramolecular coordination
;
organometallic complexes
;
tantalum
;
zinc
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A dimeric tantalum-zinc neophylidyne complex proposed to be [{{TaCl2(μ-CCMe2Ph)(μ-Cl)(THF)2}{Zn(μ-Cl)}}2](5a), which can be prepared easily on a scale of 50 mmol, is an ideal starting material for the synthesis of mono- and bis(ortho)-chelated arylamine alkylidyne species such as the red Ta-Zn neophylidyne complexes [TaCl2(μ-C6H4CH2NMe2-2)(μ-CCMe2Ph)ZnCl(THF)] (6) and [TaCl2-{μ-C6H3(CH2NMe2)2-2,6}(μ-CCMe2Ph)ZnCl] (7), which have been isolated in high yields. Reaction of 7 with tmeda affords the Tav alkylidene complex [TaCl(=CHCMe2Ph){C6H3(CH2N(Me)CH2)-2-CH2NMe2)-6}] (8), which shows catalytic activity in the ring-opening metathesis polymerization of norbornene.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/chem.19970030522
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