The first nonaselenium ring

Abstract

The reaction of Se(2)Cl(2) with RhCl(3).4H(2)O at 100 degrees C gives dirhodium nonaselenium hexachloride Rh(2)Se(9)Cl(6). The structure exhibits the first Se(9) ring observed to date.

Bridging Nonaselenium Ring in [Se9(IrBr3)2], and Three Modifications of the Mononuclear Complex [IrBr3(SeBr2)3]

“…[5] and [Se 9 (RhX 3 ) 2 ] (X = Cl, Br). [11] The unit cell comprises eight [(Br 3 Ir)Se 9 (IrBr 3 )] molecules with non-crystallographic D 3 symmetry (Figure 3 and Figure S4, Supporting Information). The dinuclear iridium complex is centered by an uncharged nonaselenium ring with crown conformation, unknown among the element's allotropes, which coordinates with three plus three of its atoms to two iridium(III) cations (μ-1κ 3 Se 1,4,7 :2κ 3 Se 3,6,9 mode).…”

In‐Between Complex and Cluster: A 14‐Vertex Cage in [Ag2Se12]2+

“…[7] Related salts containing almost non-interacting cationic stacks are [Rb(Se 8 ) + ] 1 [8] and [Rb(Se 6 ) 2 + ] 1 . [9] The neutral selenium complexes [PdX 2 -(Se 6 )] [10] (X = Cl, Br), [(AgI) 2 Se 6 ], [11] [Re 2 I 2 (CO) 6 (Se 7 )], [12] and [Rh 2 (Se 9 )Cl 6 ] [13] complete this series. Herein we are interested to discover, if in addition to metastable allotropes such as Se 6 , [1] also hitherto unknown allotropes of selenium might be accessible by coordination to the silver ion.…”

A Se19 Homocycle Complexed by Two Copper(I) Ions

“…Other known or novel Se n units were found as part of transition-metal complexes; for example, [PdBr 2 Se 6 ], [8] [Re 2 (m-X) 2 (CO) 6 (Se 7 )] (X = Br, I), [9] [Rb 2 {Pd-(Se 4 ) 2 }]·Se 8 , [10] and [Rh 2 Se 9 Cl 6 ]. [11] Very recently, the first complexes of Te n (n = 6, 8, 9, with Ru as metal) were also reported by Ruck et al [12] The motivation for the following work was the assumption that, in analogy to the [Ag 2 Se 12 ] 2+ complex, bare copper(I) ions with very weakly coordinating counterions [7,[13][14][15][16][17][18] might react with selenium to give molecular ions that perhaps include an unknown cyclic allotrope of selenium. To investigate this, two equivalents of the highly soluble Cu I source [Cu(dfb) 2 ][A] (dfb = 1,2-F 2 C 6 H 4 ; [A] = [Al(OC(CF 3 ) 3 ) 4 ]) [7] and 19 equivalents of freshly prepared red selenium were mixed in liquid sulfur dioxide and sonicated for 48 h. The color of the solution turned intensely brown-red and some residual dark brown precipitate formed.…”