Abstract
A series of Sn(II) and Sn(IV) compounds containing ketiminate ligands were synthesized. Reactions of SnCl 2 with 1 or 2 equiv. Li[OCMeCHCMeNAr] (where Ar = 2,6-diisopropylphenyl) generate [OCMeCHCMeNAr]SnCl ( 1) and [OCMeCHCMeNAr] 2Sn ( 2) in moderate yield, respectively. Similarly, reacting SnCl 4 with 2 equiv. Li[OCMeCHCMeNAr] yields a six-coordinated [OCMeCHCMeNAr] 2SnCl 2 ( 3). Divalent tin compound 2 can be oxidized with I 2 in diethyl ether to generate tetravalent tin compound [OCMeCHCMeNAr] 2SnI 2 ( 4) in moderate yield. Compounds 1– 4 have been characterized by 1H and 13C NMR spectroscopy and have been analyzed by X-ray crystallography. Theoretical calculation found that the bonding of ketiminate ligands and tin atom in compound 2 has a strong ionic character.
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