The polonium halides. Part II. Bromides

Bagnall, Kenneth W.; D'Eye, R. W. M.; Freeman, Jim

doi:10.1039/jr9550003959

Cited by 17 publications

(6 citation statements)

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“…One Po atom is randomly distributed over a four-fold position. 31 The Po-Br bonding in (NH 4 ) 2 PoBr 6 is described as largely covalent, which is attributed to the Po-Br bond distance of 2.60Å and a Po(IV) radius of 0.65Å. Cs 2 PoBr 6 also crystallizes as a face-centered cubic crystal with a = 10.99Å, having four molecules per unit cell and a density of 4.75 g ml −1 .…”

Section: Polonium: Inorganic Chemistrymentioning

confidence: 99%

Polonium: Inorganic Chemistry

Zingaro¹

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The chemistry of polonium is quite limited. Because all of the isotopes of this element are radioactive, and because it is available in such limited quantities, research with polonium is difficult. The metal has been isolated and characterized. Although a number of polonium compounds, such as PoO2 have been well characterized, the evidence for many is insubstantial. Among the halide derivatives, PoCl4 has been studied in greatest detail. A number of other halides, and their complex ions such as PoBr6‐2, have been studied with considerable success. A simple binary nitride has never been prepared, and only indirect evidence for the existence of H2Po has been reported.

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Section: Polonium: Inorganic Chemistrymentioning

confidence: 99%

Polonium: Inorganic Chemistry

Zingaro¹

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

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“…Demnach ist die Beobachtung einer dynamischen bzw. statischen Verzerrung des AX 6 -Oktaeders abhängig von der Punktsymmetrie seiner Lage im Kristall.…”

Section: Einführungunclassified

“…Verlag der Zeitschrift für Naturforschung, D-7400 Tübingen 0932 -0776/88/0800-1003/$ 01.00/0 tisch verzerrt oktaedrischen Anionen synthetisiert werden [3]. Strukturdaten für die naturgemäß schwer zugänglichen Polonate sind kaum verfügbar -die Literatur berichtet lediglich über Untersuchungen an pulverförmigem Material [6]. Während XeF 6 zu der am besten untersuchten Spezies dieser Verbindungsklasse gehört (vgl.…”

Section: Einführungunclassified

“….3582 (1) .2729 (2) .1694 (1) .0541 .3607 (1) .2722 (1) .1682 (1) .0483 X (2) .2117 (1) .2069 (1) .3694 (1) .0547 .2087 (2) .2103 (1) .3705 (1) .0531 X (3) .0730 (1) .1703 (2) .0722 (1) .0497 .0691 (1) .1727 (1) .0671 (1) .0475 X (4) .2579(1) -.0989 (2) .0255 (1) .0600 .2608(2) -.0994 (1) .0205 (1) .0564 X (5) .1403(1) -.1350 (1) .2669 (1) .0539 .1364(1) -.1413 (1) .2677 (1) .0487 X (6) .4006(1) -.0465 (2) .3450 (1) .0707 .4037(1) -.0492 (2) .3475 (1) .0657 N(l)…”

Section: (5) 0330 X(l)mentioning

confidence: 99%

“…Statically distorted BiX,, 3_ -octahedra confirm the symmetry rules for the stereochemistry of the lone pair electrons in AX ft E-systems. Basic structural data for all compounds containing BiX 6 3_ and SbX h 3 ions (X = Cl, Br, I) known to date are given including the Zl-values as a measure for the distortion of the octahedral coordination polyhedron.…”

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Zur Stereochemie des freien Elektronenpaares in AX6E-Systemen, VIII. Statisch verzerrte Anionen in [H₃N(CH₂)₃NH₃]₃(BiX₆)₂(H₂O)₂ mit X = Cl, Br/ On the Stereochemistry of the Lone-Pair Electrons in AX₆E-Systems, VIII Statically Distorted Anion in [H₃N(CH₂)₃NH₃]₃(BiX₆)₂(H₂O)₂ with X = Cl, Br

Bois

Abriel

1988

Zeitschrift Für Naturforschung B

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Using 293 K diffractometer intensity data, the crystal structures of fH 1 N(CH 2 ) 3 NH 3 ] 3 (BiX 6 ) 2 (H 2 0) 2 with X -Cl, Br have been determined by single crystal X-ray technique and refined to a final R w of 0.027 and 0.043, respectively. The structures are isotypic, space group P2,/c, Z = 2 with a = 14.415(1). b = 9.7401(7), c = 12.4609(9)Ä, ß = 105.997 (8) EinführungIn unseren früheren Arbeiten [1 -3] wurden die VSEPR-Regeln [4, 5] für die AX 6 E-Systeme, die lange Zeit als deren Ausnahmen angesehen wurden, modifiziert und ergänzt. Demnach ist die Beobachtung einer dynamischen bzw. statischen Verzerrung des AX 6 -Oktaeders abhängig von der Punktsymmetrie seiner Lage im Kristall.

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