ISSN:
0009-2940
Keywords:
(Borole)metal complexes
;
Tripledecked complexes, electrophilic stacking reaction of, nucleophilic degradation of
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Tripledecker Complexes, VIII. - Electrophilic Stacking Reactions of Borataferrocene and Bis(borole)cobaltate Ions with Tricarbonylmetal Fragments of Chromium and Manganese Group MetalsBis(borole)cobaltate ions [CoL2]- (1-) and borataferrocene ions [CpFeL]- (2-) (a: L = C4H4BMe; b: L = C4H4BPh) readily undergo stacking reactions. When treated with sources of chromium group M(CO)3 fragments, 1b- and 2b- form 30-e tripledecked anions [μ-L(CoL){M(CO)3}]- (M = Cr, Mo, W) (3- - 5-) and [μ-L(FeCp){M(CO)3}]- (M = Cr, Mo, W) (6--8-). These 30-e anions are very sensitive to nucleophilic degradation by e.g. water, acetonitrile and to a lesser extent acetone. Cyclic voltammetry reveals a reversible oxidation of 6- to give the 29-e neutral tripledecker complex μ- L(FeCp)[Cr(CO)3] (6), while the oxidation of the higher homologues is fully irreversible. Protonation of 6- -8- affords hydrido complexes μ-L(FeCp)[MH(CO)3] (M = Cr, Mo, W) (9-11), and, with PhCH2Br, the benzyl derivate μ-L(FeCp)-[W(CO)3(CH2Ph)] (12) is produced. Similar stacking reactions with manganese group M(CO)3 fragments produce neutral tripledecked complexes as e.g. μ-L(CoL)[Re(CO)3] (14) (L = C4H4BPh). In the case of the reaction of [CpFeL]- (2-) with [Mn(CO)3(NCMe)3]3]PF6 symmetric tripledecker compounds μ-L[Mn(CO)3]2 (15a,b) and μ-L(FeCp)2 (16a,b) are formed in a novel dismutation reaction (a: L = C4H4BMe; b: L = C4H4BPh).
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19911240910
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