Preparation and crystal structures of ditellurium octaselenium bis(hexafluoroarsenate)-sulfur dioxide Te2Se8(AsF6)2 . SO2, and "tetratellurium hexaselenium" bis(hexafluoroarsenate) Te3.7Se6.3(AsF6)2

Preparation and crystal structures of tritellurium trisulfur bis(hexafluoroarsenate), ditellurium tetraselenium bis(hexafluoroantimonate), and ditellurium tetraselenium bis(hexafluoroarsenate)

“…The first of these compounds was prepared by a new type of method, i.e., the reaction between two different homonuclear cations, in this case S82+ and Te42+, in solution in S02, as well as by two other methods that we have used previously, namely, the reaction of a 1:1 Te-S "alloy" or a 1:1 Te-S mixture with AsF5 in S02 solution. 1 The other two compounds were prepared by the reaction of a 1:1 Te-Se mixture with either AsFs or SbF5 in S02 as solvent.…”

“…F( 5) 108 (9) F( 6) 179 ( 9) F(4)-As(l)-F( 5) 109 ( 5) F( 6) 104 ( 5) F(5)-As(l)-F( 6) 73 (8) F(7)-As(2)-F(8) 116 (3) F( 9) 62( 3) F (10) 57( 4) F(ll) 117( 4) F( 12) 179 ( 4) F(8)-As(2)-F( 9) 172( 5) F( 10) 78 (3) F(ll) 104 (3) F( 12 ) 63( 4) F(9)-As(2)-F( 10) 96 ( 4) F(ll) 83( 5) F( 12) 119( 6) F(10)-As(2)-F(ll) 174 ( 4) F( 12) 122 ( 6) F(ll)-As(2)-F( 12) 63( 7) Anions Sb(l)-F(l) 1 .86(5) ) F(3)-Sb(l)-F( 4) 85 (3) F(2) 1 .96 ( 6) F( 5) 89( 4)…”

“…1 .84 (7) mean F( 6) 155 (4) F(4) 1 .67 (6) 1.75 F(4)-Sb(l)-F( 5) 88 (4) F( 5) 1 •53(9) F( 6) 70 (4) F( 6) 1 .62 (10)} F(5)-Sb(l)-F( 6) 94 ( 5)…”

Heterocations in Superacid Systems

“…,905 the dark green color of Se 8 2þ 344 slowly diminished (over a 12-h period) resulting in the formation of Te 2 Se 8 (AsF 6 ) 2 SO 2 931. The X-ray crystal structure of this product indicates that the adduct has Te 2 Se 8 2þ cation with a bicyclo[4.2.2]decane-type structure similar to that of the Se 10 2þ cation(345).…”

“…The X-ray crystal structure of this product indicates that the adduct has Te 2 Se 8 2þ cation with a bicyclo[4.2.2]decane-type structure similar to that of the Se 10 2þ cation(345). By changing the ratio of tellurium metal to Se 8 2þ 344, Gillespie and coworkers931 have managed to prepare Te 3.was accomplished by reacting powdered Te and Se with AsF 5 or SbF 5 in SO 2 932. The novel Te 2 Se 6 2þ cation in (Te 2 Se 6 ) þ (SbF 6 À ) 2 is not isostructural with previously known cations S 8 2þ and Se 8 2þ .…”