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[H 3 O · (Dibenzo‐18‐crown‐6)][Te 2 Br 9 ] and [H 5 O 2 ][Te 2 Cl 9 ] · 2 C 4 H 8 O 2 : Two New Oxonium Halotellurates(IV) Containing a Novel Type of [Te 2 X 9 ] – Anions
Author(s) -
Reich O.,
Hasche S.,
Bonmann S.,
Krebs B.
Publication year - 1998
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199803)624:3<411::aid-zaac411>3.0.co;2-u
Subject(s) - oxonium ion , chemistry , crystallography , crown ether , triclinic crystal system , octahedron , cationic polymerization , stereochemistry , orthorhombic crystal system , crystal structure , medicinal chemistry , ion , polymer chemistry , organic chemistry
Red crystals of [H 3 O · (dibenzo‐18‐crown‐6)][Te 2 Br 9 ] ( 1 ) were isolated from a solution of TeBr 4 and dibenzo‐18‐crown‐6 in CH 3 CN containing a small amount of hydrobromic acid. The compound crystallizes in the triclinic space group P 1 with the cell dimensions a = 9.010(2), b = 13.403(3), c = 14.606(4) Å, α = 98.94(2)°, β = 100.40(2)°, and γ = 91.40(2)° (150 K). From a solution of TeCl 4 in 1,4‐dioxane containing hydrochloric acid [H 5 O 2 ][Te 2 Cl 9 ] · 2 C 4 H 8 O 2 ( 2 ) precipitates as colorless crystals in the orthorhombic space group Pnma with the cell dimensions a = 17.023(4), b = 13.389(4), and c = 10.900(3) Å (150 K). In both structures the [Te 2 X 9 ] – anion (X = Cl, Br) consists of one TeX 6 octahedron and one TeX 5 square pyramidal unit connected by a common edge. In compound 1 the coordination sphere of the square pyramidal fragment is completed by a very weakly η 6 bound benzo group of the cationic unit. In compound 2 an oxygen atom of the oxonium ion weakly interacts with the fivefold coordinated tellurium atom. The cationic units are a crown ether oxonium complex in 1 and a supramolecular 1,4‐dioxane‐oxonium network in 2 .