4.5 Article

Crystal Structures of Hexafluoridoantimonate(V) Salts of d-block Metals in Oxidation State+2

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出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202101076

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Antimony; Coordination compounds; d-block metals; Fluoride

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  1. Slovenian Research Agency [P1-0045]

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The crystal structures of M(SbF6)(2) salts exhibit different types and spatial arrangements.
The crystal structures of the M(SbF6)(2) salts (M=Cu, Pd) are isotypic (Type I). They crystallize in the triclinic space group P (1) over bar, Z=1 at 150 K. M2+ cations lying in the same plane are connected via SbF6 units forming slabs. There are only van der Waals contacts of fluorine atoms between the adjacent slabs. Salts of M(SbF6)(2) (M=Fe, Co, Zn) crystallize differently (Type II; space group P (1) over bar, Z=2 at 150 K). Their crystal structures are composed of M2+ cations interconnected by [SbF6](-) anions - thus forming a three-dimensional framework. The crystal structure of Fe(SbF6)(2), determined at 240 K, is currently the only representative of the Type III. The main feature of this type is also a three-dimensional framework consisting of M2+ cations and [SbF6](-) anions. However, the mode of their association differs from that observed in Type II. The crystal structures of CuFSbF6 (orthorhombic space group Imma, Z=4 at 150 K) and AgFSbF6 (orthorhombic space group Pnrna, Z=4 at 150 K) are not isotypic. The crystal structures of the by-products H2ONi(SbF6)(3) (orthorhombic space group Pnma, Z=4 at 150 K) and (O-2)(2)Ag6CuF5(SbF6)(11)center dot 2HF (triclinic space group P (1) over bar, Z=1 at 150 K) were determined. In the latter, HF is directly attached to an Ag(II) via a fluorine atom.

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