Dibromobis(4-methoxyphenyl)tellurium(IV)

Farran, Joan; Alvarez-Larena, A.; Piniella, J. F.; Germain, Gabriel; Torres-Castellanos, Libardo

doi:10.1107/s0108270194007122

Acta Crystallogr C

1995

DOI: 10.1107/s0108270194007122

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Dibromobis(4-methoxyphenyl)tellurium(IV)

Joan Farran¹,

A. Alvarez-Larena²,

J. F. Piniella³

et al.

Abstract: The structure analysis shows that the title compound, [TeBr2(CTHTO)2], is isostructural with the corresponding dichloro compound. There are two molecules in the asymmetric unit in which the Te atom has pseudotrigonal bipyramidal coordination geometry. The two independent molecules, along with their centrosymmettic equivalents, form isolated tetramers by means of Te...Br contacts ranging from 3.535 (1) to 3.741 (1)/~.

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2007

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The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

Aragoni¹,

Arca²,

Devillanova³

et al. 2007

Bioinorganic Chemistry and Applications

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The 3 centre-4 electrons (3c-4e) and the donor/acceptor or charge-transfer models for the description of the chemical bond in linear three-body systems, such as I3 − and related electron-rich (22 shell electrons) systems, are comparatively discussed on the grounds of structural data from a search of the Cambridge Structural Database (CSD). Both models account for a total bond order of 1 in these systems, and while the former fits better symmetric systems, the latter describes better strongly asymmetric situations. The 3c-4e MO scheme shows that any linear system formed by three aligned closed-shell species (24 shell electrons overall) has reason to exist provided that two electrons are removed from it to afford a 22 shell electrons three-body system: all combinations of three closed-shell halides and/or chalcogenides are considered here. A survey of the literature shows that most of these three-body systems exist. With some exceptions, their structural features vary continuously from the symmetric situation showing two equal bonds to very asymmetric situations in which one bond approaches to the value corresponding to a single bond and the second one to the sum of the van der Waals radii of the involved atoms. This indicates that the potential energy surface of these three-body systems is fairly flat, and that the chemical surrounding of the chalcogen/halogen atoms can play an important role in freezing different structural situations; this is well documented for the I3 − anion. The existence of correlations between the two bond distances and more importantly the linearity observed for all these systems, independently on the degree of their asymmetry, support the state of hypervalency of the central atom.

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The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

Aragoni¹,

Arca²,

Devillanova³

et al. 2007

Bioinorganic Chemistry and Applications

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show abstract

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Dibromobis(4-methoxyphenyl)tellurium(IV)

Cited by 1 publication

References 12 publications

The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

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Dibromobis(4-methoxyphenyl)tellurium(IV)

Cited by 1 publication

References 12 publications

The Nature of the Chemical Bond in Linear Three-Body Systems: From I3–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

The Nature of the Chemical Bond in Linear Three-Body Systems: From I3–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

Contact Info

Product

Resources

About

The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties

The Nature of the Chemical Bond in Linear Three-Body Systems: From I₃^–to Mixed Chalcogen/Halogen and Trichalcogen Moieties