Organotin Compounds Ph2XSnCH2-[19]-crown-6 (X = Ph, F, Cl, Br, I, SCN) and Ph2ISnCH2Sn(I)PhCH2-[19]-crown-6 as Ditopic Receptors for Potassium Salts

The syntheses of the organotin-substituted crown ethers Ph2XSnCH2[19]-crown-6 (1, X = Ph; 2, X = Br; 3, X = I; 4, X = Cl; 5, X = F; 6, X = SCN) and Ph2XSnCH2Sn(Y)PhCH2-[19]-crown-6 (7, X = Y = Ph; 8, X = Ph, Y = I; 9, X = Y = I) and of the ditopic complexes 5·KF, 6·KSCN, and 9·KF are reported. These compounds are characterized by elemental analyses, 1H, 13C, and 119Sn NMR spectroscopies, electrospray mass spectrometry, and in the cases of 1−4, 8, 9·H2O, and 9·KF also by single-crystal X-ray diffraction studies. The coordination geometry about the tin atoms in compounds 1 and 8 (Sn2) is distorted tetrahedral, whereas it is trigonal bipyramidal for the tin atoms in compounds 2, 3, 4, 8 (Sn1), 9·H2O, and 9·KF.