Structure of Ag(CHPh<sub>3</sub>)(1-Me-CB<sub>11</sub>F<sub>11</sub>). Trigonal-Planar Ag(Arene)<sub>3</sub><sup>+</sup> Cations, Polymeric {Ag(CHPh<sub>3</sub>)<sup>+</sup>}<sub>∞</sub> Triangular-Net Layers, and Partially Aligned Interstitial Carborane Anions in a Polar Crystal
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The synthesis and structure of the layered solid Ag(CHPh3)(1-Me-CB11F11) are described. The compound crystallized from dichloromethane solution in the polar space group Pna21 (orthorhombic, C21H19AgB11F11, a = 21.6736(7) Å, b = 8.7163(3) Å, c = 14.5737(5) Å, Z = 4). The structure consists of layers of {Ag(CHPh3)+}∞ polycations with 1-Me-CB11F11- anions filling half of the trigonal prismatic holes defined by six Ag+ ions from successive {Ag(CHPh3)+}∞ layers. The {Ag(CHPh3)+}∞ triangular-net layers contain the first example of a rigorously trigonal-planar Ag(arene)3+ complex. There are no contacts between the Ag+ cations and the 1-Me-CB11F11- superweak anions shorter than 3.29 Å. The idealized C5 axes of the per-B-fluorocarborne anions are partially aligned along the crystallographic c axis.
