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Versatile Coordination of AgI and CuI Ions towards cyclo-As5 Ligands.

ABSTRACT: The reactions of the cyclo-As5 complex [Cp*Fe(η5 -As5 )] (B) with the AgI and CuI salts of the weakly coordinating anion (WCA) [FAl{OC6 F10 (C6 F5 )}3 ]- ([FAl]- ) are studied. These reactions allow the synthesis of the mononuclear complexes [M(η5  : η2 -B)2 ][FAl] (M=Ag (1), Cu (2)) when a ratio of B/M(FAl) 2 : 1 is used. Compound 1 shows an unusual disorder of the central AgI cation between two π-coordinating cyclo-As5 ligands, which is absent in 2 pointing to a weak interaction of the Ag center towards the cyclo-As5 ligands in B. When the ratio of B/Ag(FAl) is changed to 3 : 1 or 1 : 1, the respective coordination compounds [Ag(η2 -B)3 ][FAl] (3) and [Ag2 (η2  : η2 -B)2 ][FAl]2 (4) are accessible. The coordination modes of the cyclo-As5 units in 1, 3 and 4 are all different, reflecting the adaptive coordination behavior of B towards AgI ions. The optimized geometries in the gas phase of 1-4 are determined by DFT calculations to support the bonding situation observed in their solid-state structures.

SUBMITTER: Moussa ME 

PROVIDER: S-EPMC8361777 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Versatile Coordination of Ag<sup>I</sup> and Cu<sup>I</sup> Ions towards cyclo-As<sub>5</sub> Ligands.

Moussa Mehdi Elsayed ME   Fleischmann Martin M   Balázs Gábor G   Virovets Alexander V AV   Peresypkina Eugenia E   Shelyganov Pavel A PA   Seidl Michael M   Reichl Stephan S   Scheer Manfred M  

Chemistry (Weinheim an der Bergstrasse, Germany) 20210601 38

The reactions of the cyclo-As<sub>5</sub> complex [Cp*Fe(η<sup>5</sup> -As<sub>5</sub> )] (B) with the Ag<sup>I</sup> and Cu<sup>I</sup> salts of the weakly coordinating anion (WCA) [FAl{OC<sub>6</sub> F<sub>10</sub> (C<sub>6</sub> F<sub>5</sub> )}<sub>3</sub> ]<sup>-</sup> ([FAl]<sup>-</sup> ) are studied. These reactions allow the synthesis of the mononuclear complexes [M(η<sup>5</sup>  : η<sup>2</sup> -B)<sub>2</sub> ][FAl] (M=Ag (1), Cu (2)) when a ratio of B/M(FAl) 2 : 1 is used. Compound 1  ...[more]

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