Cyclic Dinuclear Organotin Cations Stabilized by Bulky Substituents

The syntheses of sterically congested 2,2-bis­(diorganochloridostannyl)­propane, Me₂C­(SnClR₂)₂ (1; R = CH­(SiMe₃)₂), the related salts [cyclo-{Me₂C­(SnR₂)₂X}­B­(Ar^F)₄] (2, X = Cl; 3, X = OAc; 4, X = OH; Ar^F = 3,5-(CF₃)₂C₆H₃), and the four-membered-ring cyclo-{Me₂C­(SnR₂)₂O} (5) are reported. The compounds have been characterized by elemental and EDX analyses, ¹H, ¹¹B, ¹³C, ¹⁹F, ²⁹Si, and ¹¹⁹Sn NMR and IR spectroscopy, electrospray ionization mass spectrometry, and single-crystal X-ray diffraction analysis.