Synthesis and Structure of a New Tetrakis(pentafluorophenyl)borate Salt of the Silver(I) Cation with Novel Trigonal Planar Tris(benzene) Coordination

Abstract

A new, analytically pure silver(I) salt, Ag(C 6 H 6 ) 3 + B(C 6 F 5 ) 4 -(1), was prepared, and its structure determined by single-crystal X-ray crystallography. The geometry around the silver atom in salt 1 is trigonal planar, which represents a novel coordination mode for a silver(I) coordinated with three independent arene molecules. The three benzene molecules are bound to the silver atom with estimated hapticities of η 1.36 , η 1.31 , and η 1.44 . No contact was found between the silver cation and the B(C 6 F 5 ) 4 -anion.

Synthesis of Pentafluorophenyl Silver by Means of Lewis Acid Catalysis: Structure of Silver Solvent Complexes

“…The distortion from perfect planarity can be attributed to packing effects. Recently, it was shown that weakly coordinating 39 strongly resemble the [Ag(toluene) 3 ] þ ion with respect to structure and bonding. In all cases the key to formation of these complexes is the utilization of weakly coordinating ions, which formally generate pseudo-gas-phase conditions.…”

Metal–Arene Interactions in Dialkylbiarylphosphane Complexes of Copper, Silver, and Gold

“…According to Kochis geometric criteria, [75] the hapticities of 13 a and 13 b are h = 1.76 and 1.97, respectively. The separation between Ag and the mean aromatic plane of 13 a-c is 2.3 , slightly greater than that found for the analogous Au I complexes 4 a and 4 c (approximately 2.2 ).…”

Cationic Group 4 Metallocene–(o‐Phosphanylaryl)oxido Complexes: Synthetic Routes to Transition‐Metal Frustrated Lewis Pairs

“…The bonds are so stable that the standard protocol used to synthesize [Cp 2 TiMe 2 ] involves an aerobic, aqueous workup. [45] The requirement for stringently anhydrous halide-abstraction reagents led us to the cation [Et 3 Si][B(C 6 F 5 ) 4 ], prepared by reaction with [CPh 3 ]-[B(C 6 F 5 ) 4 ] in neat Et 3 SiH. [44] In an effort to circumvent these problems, the mixed alkoxy/chloride compound 13 was prepared as an alternative synthon.…”