Bimetallic complexes containing the bis(tetramethylcyclopentadienyl)ethane ligand

Buzinkai, John F.; Schrock, Richard R.

doi:10.1021/ic00313a029

Cited by 25 publications

(4 citation statements)

References 2 publications

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“… It was proposed that the formation of two isomers was due to the rearrangement of the WC3 ring, which leaves the t -Bu group in the β-position . Some other related reactions have been developed by the same group. ,,− …”

Section: Reactivity Studiesmentioning

confidence: 99%

Metallaaromatic Chemistry: History and Development

2020

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Since the prediction of the existence of metallabenzenes in 1979, metallaaromatic chemistry has developed rapidly, due to its importance in both experimental and theoretical fields. Now six major types of metallaromatic compounds, metallabenzenes, metallabenzynes, heterometallaaromatics, dianion metalloles, metallapentalenes and metallapentalynes (also termed carbolongs), and spiro metalloles, have been reported and extensively studied. Their parent organic analogues may be aromatic, non-aromatic, or even anti-aromatic. These unique systems not only enrich the large family of aromatics, but they also broaden our understanding and extend the concept of aromaticity. This review provides a comprehensive overview of metallaaromatic chemistry. We have focused on not only the six major classes of metallaaromatics, including the main-group-metal-based metallaaromatics, but also other types, such as metallacyclobutadienes and metallacyclopropenes. The structures, synthetic methods, and reactivities are described, their applications are covered, and the challenges and future prospects of the area are discussed. The criteria commonly used to judge the aromaticity of metallaaromatics are presented.

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Section: Reactivity Studiesmentioning

confidence: 99%

Metallaaromatic Chemistry: History and Development

2020

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“…For example, the tungstacyclobutadiene 105 b was treated with 3,7‐decadiyne to yield the bimetallic complex 128 , and with [Rh(η 5 ‐C 5 Me 4 CH 2 CH 2 C≡CEt)(CO) 2 ] ( 129 ) to give the bimetallic complex 130 (Scheme ) . Related reactions have also been documented for the tungstacyclobutadiene [W(C 3 Me 3 )Cl 3 ] ( 106 a ) …”

Section: Reactivities Of Metallacyclobutadiene Complexesmentioning

confidence: 88%

“…2018, 13,895 -912 www.chemasianj.org have also been documented for the tungstacyclobutadiene [W(C 3 Me 3 )Cl 3 ]( 106 a). [62] There are reportst hat reactions of carbyne complexes can give cyclopentadienyl complexes directly.A sa ni llustration, the carbyne complex 36 was treated with an excess amount of the alkynesR C CR (R = Me, Et) to give am ixture of the paramagnetic complexes 131 and 132 (Scheme 37). The reactionsp resumably proceed throughm etallacyclobutadiene (37)a nd related metallabenzene intermediates.…”

Section: Scheme33 Synthesis Of the Iridabenzene 123mentioning

confidence: 99%

Chemistry of Metallacyclobutadienes

Cui

Lin

Jia

2018

Chemistry An Asian Journal

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Metallacyclobutadienes are analogues of cyclobutadienes in which one of the cyclobutadiene CR groups has been formally replaced by a transition-metal fragment. These metallacycles are interesting because they can play an important role in catalysis and can serve as starting materials for the syntheses of organometallic compounds such as metallabenzene, η -cyclopentadienyl, and η -cyclopropenyl complexes. Unlike cyclobutadienes, metallacyclobutadienes can be significantly more stable. A number of metallacyclobutadienes have now been isolated and thoroughly characterized, especially for those that contain transition metals of groups 5-9. Their properties have also been actively investigated. This article highlights the chemistry of metallacyclobutadienes with reference to their syntheses, reactivity, and structural properties.

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“…The so-called ansa-metallocene derivatives, where the bridged ligand coordinates to a metal center as a chelating group, have attracted attention as Ziegler-Natta catalysts for the stereoregular polymerization of h-olefins [1], and as stereoselective catalysts or reagents for asymmetric induced processes [2]. There is also increasing interest in the use of these didentate dicyclopentadienyl ligands for the synthesis of homo-and hetero-dinuclear complexes, where the ancillary ligand is in a bridging coordination mode [3][4][5][6]. Among the features of this type of compound, the stability of the dicyclopentadienyl framework strongly bonded to two close metal centers confers a potential cooperative effect on the molecule that could be useful during catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%