English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The bromoarsenates(lll) [Et 4 N] 3 [As 3 Br 12 ] (1). [Ph 4 P] 2 [As 2 Br 8 ] (2), [(n-prop) 4 N] 2 [As 2 Br 8 ] (3) and {[pipH] 3 [As 2 Br 9 ] · [pipH]Br} (4) have been prepared and their structures established by X-ray structural analysis. The central As atom in the novel face-bridged trioctahedral species [As 3 Br 12 ] displays an effectively regular octahedral coordination in one of the two independent anions in the unit cell of 1. The As-Br distances are 2.671 (1) - 2.672(2) Å with Br-A s-Br angles in the range 88.8(1)-91.2(1)°. In contrast the outer As atoms exhibit a severely distorted octahedral geometry with three short As - Br terminal bonds (2.404(2)-2.409(2) Å). The [As 2 Br 8 ] 2-  anions in 2 and 3 are centrosymmetric with the As atoms displaying a square-pyramidal coordination. A structural correlation of opposite As-Br distances in the linear three-centre Br-As···Br interactions is presented. The sum of the bond valences in bromoarsenates(III) is a minimum for the regular octahedral geometry, reflecting, thereby, the influence of the As 4s-orbital in the antibonding 2a 1g  MO. An empirical expression for As-Br distances in bromoarsenates(III) is derived.

zeitschrift für naturforschung b

Regular Octahedral Coordination of As(III) in the Anion [As 3 Br 12 ] 3-  Structural Correlation of the Antibonding Influence of the As 4s-Orbital in Bromoarsenates(III)