‘1,3-dimetallabenzene’ derivatives of niobium and tantalum

Riley, P. N. K.; Profilet, Robert D.; Salberg, Michelle M.; Fanwick, Phillip E.; Rothwell, Ian P.

doi:10.1016/s0277-5387(97)00316-1

Cited by 47 publications

(24 citation statements)

References 9 publications

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“…[192] Relateds peciesh ave also been prepared by changing the ancillary ligandsa nd the insertinga lkyne. [193] Although these complexesa re distorted from planarity,t here is only minor bond length alternation and the structurest herefore support the presence of ad elocalized p-system. Related species with two Wm etal centres are more significantly distorted and appear to possess essentially localized bonding.…”

Section: Dimetallabenzenesmentioning

confidence: 71%

Recent Advances in Metallaaromatic Chemistry

Frogley

Wright

2017

Chemistry A European J

142

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Metallaaromatics can be broadly defined as aromatic compounds in which one of the ring atoms is a transition metal. The metallabenzenes are one important class of these compounds that has undergone extensive study recently. Closely related species such as fused-ring metallabenzenes, heterometallabenzenes, π-coordinated metallabenzenes and metallabenzynes have also attracted considerable attention. Although many metallaaromatics can be considered as metalla-analogues of classic organic aromatic compounds, this is not always the case. Recent seminal studies have shown that metallapentalenes and metallapentalynes, which are metalla-analogues of the anti-aromatic compounds pentalene and pentalyne, are in fact aromatic and highly stable. Very unusual spiro-metallaaromatic compounds have also recently been isolated. In this concepts article, key features of all these intriguing metallaaromatic compounds are discussed with reference to the structural, spectroscopic, reactivity and theoretical studies that have been undertaken. These compounds continue to generate much interest, not only because of the contributions they make to fundamental chemical understanding, but also because of the promise of possible practical applications.

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Section: Dimetallabenzenesmentioning

confidence: 71%

Recent Advances in Metallaaromatic Chemistry

Frogley

Wright

2017

Chemistry A European J

142

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“…A tantalapyridine complex 45 has been reported by Wigley et al [24], while tungstapyrimidine complex 46 has been reported by Feng et al [42]. A family of 1,3-dimetallabenzenes 47, generated by alkyne insertion into dimetallacyclobutadienes, have been reported by Profilet et al [43,44].…”

Section: Reviewsmentioning

confidence: 97%

Progress in the synthesis and reactivity studies of metalla-benzenes

He¹

2004

Chinese Sci Bull

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Metallabenzenes are metallacyclohexatriene complexes that are derived by replacement of one of the CH groups in benzene with a transition-metal fragment. Their synthesis and aromatic properties have recently attracted considerable attention. This paper summarizes the progress in the synthesis, aromatic property, and reactivity studies of metallabenzenes. We will describe the synthesis and reactivity of typical metallabenzenes with various metals (e.g. osmium, iridium, and ruthenium, etc.), the synthesis and structure of a recent reported example of metallanaphthalene and several rare examples of novel and stable metallabenzynes. Finally, the possible future developments in this field have also been suggested. Scheme 2. Three classes of hypothetical metallacycles with some aromatic character.The first comprehensive review of the previous studies of metallabenzenes (especially on their synthesis, structure, and spectroscopy) was written by Bleeke[6] and appeared in 200 1. This paper mainly concerns the recent progress in the synthesis, aromaticity, and reactivity of metallabenzenes, metallaheterobenzenes, dimetallabenzenes, and metallabenzynes. The earlier work will also be briefly discussed.

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“…One of the major goals of inorganic chemistry has been attained with the application of the electronic properties of hard amide ligands, an area that has been reviewed recently (Cummins, 1998;Schrock, 1997a,b). In contrast, recent work by ourselves (Nygren et al, 2003(Nygren et al, , 2004 and others (Riley et al, 1998(Riley et al, , 1999(Riley et al, , 2001Tanski & Parkin, 2003) has been based on the exploration of the chemistry of amide ligands in which the % interaction is uncertain with respect to the donation to the metal center. These amides with a lower % basicity (Tanski & Parkin, 2003) form a class of non-innocent ligands in coordination chemistry that differ from the non-innocent ligands described by Gray et al (1967), in that the oxidation state is not uncertain, only the degree of electronic coupling between the %-donating ligating atom and the metal center.…”

Section: Commentmentioning

confidence: 99%

“…Carbazolyl complexes of transition metals that are '-bound are rare (Lopez et al, 2002); most of the known examples (Riley et al, 1998(Riley et al, , 1999(Riley et al, , 2001) involve group 4B and 5B metals. A few biscarbazolyl structures are known for the group 4B metals (mostly containing titanium; Riley et al, 2001).…”

Section: Commentmentioning

confidence: 99%

trans-Dichloro-cis-bis(3,6-dimethylcarbazolyl)-cis-bis(tetrahydrofuran)zirconium(IV) benzene sesquisolvate

2003

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In the title compound, [ZrCl2(C14H12N)2(C4H8O)2]·1.5C6H6, the Zr atom is pseudo‐octahedral, with two Cl atoms in trans positions and two tetrahydrofuran molecules in cis positions. The two 3,6‐dimethylcarbazolyl ligands are in cis positions and are canted with respect to one another. The two Zr—N distances are 2.1148 (18) and 2.1236 (18) Å, and the N—Zr—N angle is 95.08 (7)°. The title compound crystallizes as the benzene solvate, with one of the benzene molecules positioned on an inversion center.

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‘1,3-dimetallabenzene’ derivatives of niobium and tantalum

Cited by 47 publications

References 9 publications

Recent Advances in Metallaaromatic Chemistry

Recent Advances in Metallaaromatic Chemistry

Progress in the synthesis and reactivity studies of metalla-benzenes

trans-Dichloro-cis-bis(3,6-dimethylcarbazolyl)-cis-bis(tetrahydrofuran)zirconium(IV) benzene sesquisolvate

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