Tetraphenylantimony perrhenate and tetraphenylantimony chlorate: Syntheses and structures

The reaction of tetraphenylantimony chloride with sodium perrhenate or potassium chlorate yields tetraphenylantimony perrhenate (I) and tetraphenylantimony chlorate (II), respectively. Complex I was also synthesized from pentaphenylantimony and triphenylantimony diperrhenate in toluene. According to X-ray diffraction, crystals I and II consist of almost regular tetrahedral tetraphenylstibonium cations (CSbC, 109.4(2)°–109.5(7)° in I and 109.1(1)°–109.6(1)° in II) and [ReO4]− (OreO, 107.6(3)°–113.3(5)°) and [ClO3]− (OClO, 96.3(9)°, 116.4(5)°) anions, respectively. The average Sb-C bond lengths (2.094(3) Å in I, 2.097(2) Å in II) are close to the sum of the covalent radii of the Sb and C atoms. The average distances Re-O in complex I (1.672(4) Å) and Cl-O in complex II (1.315 Å) correspond to multiple bonds.