The preparation and properties of tellurium dibromide

Aynsley, E. E.; Watson, R.H.

doi:10.1039/jr9550002603

Cited by 9 publications

(7 citation statements)

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“…(9) Kniep, Mootz & Rabenau (1973). (10) Kniep, Mootz & Rabenau (1974 (Damiens, 1923;Aynsley & Watson, 1955;Paulat & Krebs, 1976c) …”

Section: Beschreibung Der Struktur Und Diskussionunclassified

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Kristallstruktur des Tellurtetrajodids TeJ₄

Krebs¹,

Paulat²

1976

Acta Crystallogr Sect B

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The crystal structure of tellurium tetraiodide TeL was determined from three-dimensional X-ray diffractometer data and was refined by full-matrix least-squares methods to an R index of 5.1%. The crystals are orthorhombic, space group Pnma, with a= 13.635 (5), b= 16.798 (5), c= 14.624 (5)/~, Z= 16TeI4. The structure is built of tetrameric (TeI4)4 molecules which are not isomorphous with the (TeCl4)4 molecular structure, but form a novel binary X4Y16 structure type composed of edge-sharing TeI6 octahedra. Mean Te-I bond lengths are 2.769, 3.108 and 3.232 ,~ for bonds to terminal, doubly and triply bridging iodine atoms, respectively. Intermolecular I...I distances as short as 3.870, 3"893, 3.932 ,~ indicate weak bonding interactions between the Te4116 molecules. Within the series of the TeF4, TeCL and TeL crystal structures, a strong decrease of the stereochemical activity of the non-bonding electron pair on tellurium(IV) is observed.

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“…(9) Kniep, Mootz & Rabenau (1973). (10) Kniep, Mootz & Rabenau (1974 (Damiens, 1923;Aynsley & Watson, 1955;Paulat & Krebs, 1976c) …”

Section: Beschreibung Der Struktur Und Diskussionunclassified

“…Der Wechsel des Strukturtyps entspricht damit dem Gang der Elektronegativit/itsdifferenzen der Elementpaare Te-Cl und Te-J. Ein Ubergang zwischen beiden Strukturtypen, etwa im Rahmen der Formulierung [(TeJ4)2(TeBr+)2(Br-)2], ist fiir daN gemischte Halogenid TeBr2J 2 (Damiens, 1923;Aynsley & Watson, 1955;Paulat & Krebs, 1976c) zu erwarten.…”

Section: Introductionunclassified

Kristallstruktur des Tellurtetrajodids TeJ₄

Krebs¹,

Paulat²

1976

Acta Crystallogr Sect B

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“…4-9 may not be required in practice. Reaction 6 has not yet been observed, but examples of all the others are known.…”

Section: Group IImentioning

confidence: 99%

“…The possibility expressed in Eq. 6 was not observed for it would have meant no loss in radioactivity of alkylmercuric halide. Secondorder kinetics and retention of configuration were consistent with two mechanisms: bimolecular electrophilic substitution at carbon with front-side attack (SE2ret, structure I) and a four-center mechanism (Sf2 or S eí, structure II).…”

Section: Group IImentioning

confidence: 99%

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Redistribution and Exchange Reactions in Groups IIB-VIIB

Lockhart¹

1965

Chem. Rev.

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Subhalides of tellurium

Kniep

Rabenau

1983

Physical and Inorganic Chemistry

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The tellurium subhalides represent a group of recently discovered compounds which have been investigated by the methods of solid-state and structural chemistry. Because of their high tellurium content and their crystal structures containing homonuclear tellurium connections they have attained significance as “modified tellurium structures”. As a consequence, tellurium subhalides have been the subject of various investigations in the fields of solid-state and chemical physics. In this paper a short survey of the group of tellurium halides is followed by detailed information on phase relations, preparation, crystal growth, and crystal structures of tellurium subhalides. Mössbauer investigations as well as optical, photoelectric, and electrical properties of the respective compounds are discussed. Solid-state galvanic cells containing tellurium subhalides have enabled the precise determination of relevant thermodynamic data

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The preparation and properties of tellurium dibromide

Cited by 9 publications

References 0 publications

Kristallstruktur des Tellurtetrajodids TeJ₄

Kristallstruktur des Tellurtetrajodids TeJ₄

Redistribution and Exchange Reactions in Groups IIB-VIIB

Subhalides of tellurium

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The preparation and properties of tellurium dibromide

Cited by 9 publications

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Kristallstruktur des Tellurtetrajodids TeJ4

Kristallstruktur des Tellurtetrajodids TeJ4

Redistribution and Exchange Reactions in Groups IIB-VIIB

Subhalides of tellurium

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Kristallstruktur des Tellurtetrajodids TeJ₄

Kristallstruktur des Tellurtetrajodids TeJ₄