Abstract
The title compound [Na(15-crown-5)][C6H5–C(NSiMe3)2SnCl3F] is synthesized by the reaction of sodium fluoride with Ph—C(NSiMe3)2SnCl3 in acetonitrile solution in the presence of 15-crown-5 as white, moisture-sensitive crystals. The complex is characterized by its IR spectrum as well as by an X-ray structure determination. Space group P212121 Z = 4, 4897 observed independent reflexions, R = 0.094. Lattice dimensions at 20°C: a = 1065.7(2), b = 1431.0(2), c = 2325.6(3) pm. The compound forms ion pairs with a bent Sn–F–Na bridge (bonding angle 119.0(5)°) and distances Sn–F of 196(1) and Na–F of 232(1) pm. The tin atom is in a distorted octahedral environment defined by the two N atoms of the symmetrically coordinated amidinato ligand, by three chlorine atoms, and by the fluorine ligand; the latter is in a trans-position relative to one of the nitrogen atoms.
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