New class of coordination compounds with noble gas fluorides as ligands to metal ions

Homoleptic [M(XeF2)6]2+ cations of copper(II) and zinc(II)—Syntheses and crystal structures of [M(XeF2)6](SbF6)2 (M=Cu, Zn)

“…Similar behaviour was previously observed, when Ln(AsF 6 ) 3 (Ln = Dy, Ho) reacted with XeF 2 , yielding a mixtures of [Ln(XeF 2 ) n ](AsF 6 ) 3 , Xe 2 F 3 AsF 6 and LnF 3 [1].…”

“…1a-h) is located in the region where vibrational bands, characteristic for non-bridging XeF 2 molecules bonded to metal centres, generally appear [1]. Additionally, the same band was observed also in Raman spectra recorded on crystalline particles (see Section 4) containing [M(XeF 2 ) 6 ](SbF 6 ) 2 (M = Cu, Zn).…”

“…Avariety of the crystal structures was found in the new class of coordination compounds of the type [M(XeF 2 ) p ] n+ (XF 6 ) n À and [M(XeF 2 ) p ] n+ (BF 4 ) n À [1]. Depending upon the strength of Lewis acidity on the metal centre, character of metal-fluorine bonds, Lewis basicity of the anions, etc., compounds crystallize as molecular structures [1], dimer structures [1], chain structures [2][3][4], double-chains structures [1], layer structures [1,5], strongly interconnected double layers [1,6] or three-dimensional networks [1].…”

Synthesis of novel salts with HF, AsF3 and XeF2 as ligands to metal cations

“…It may also be made from AgAsF 6 and excess XeF 2 in aHF. A review of the coordination compounds with XeF 2 as a ligand to metal cations of the type [M n+ (XeF 2 ) p ](AF 6 ) n was published recently [33]. In this paper a general review of this subject is given with a special emphasis on the parameters determining the structural diversity of these compounds.…”

The structure and energetics of singlet, closed-shell [B, C, F, H2]: Simplicity resulting in diversity

“…(The value of 1 has long been known in isonitriles, 5 in protonated alkanes and other nonclassical carbocations, and both 5 and 6 in the aforementioned carboranes and derivatives.) Fluorine has the common coordination number of 1, but 2 is increasingly found as well-we recognize both the species and the researcher in citing Ž emva's diverse salts containing HF, AsF 3 and XeF 2 as ligands in the cation [1,2]. We might even dare to say that coordination number 0 and/or 6 and beyond is a commonplace occurrence in that these provide alternative descriptions of the fluorine as found in binary fluoride salts.…”