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Aminostannanes and aminostannylenes containing a C,N-chelated ligand |
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| Institution: | a Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám. ?s. legií 565, CZ-532 10, Pardubice, Czech Republic b Department of Chemistry, Moscow State University, Leninskie gory, 1 (3), GSP-2, Moscow 119992, Russian Federation c A.V. Topchiev Institute of Petrochemical Synthesis, RAS, Leninsky Prosp., 29, Moscow 119991, Russian Federation |
| Abstract: | Aminotin(II and IV) compounds {(2,6-i-Pr-C6H3)(H)N]-μ-(Sn)-Cl}2, {2-(CH3)2NCH2]C6H4}2SnN(H)(2,6-i-Pr-C6H3)]2 and {2-(CH3)2NCH2]C6H4}SnN(2,6-i-Pr-C6H3)(SiMe3)] were prepared by lithium halide elimination from tin halides and corresponding lithium complexes. (2,6-i-Pr-C6H3)(H)N]Li (1) reacts with one half of molar equivalent of SnCl2 to give {(2,6-i-Pr-C6H3)(H)N]-μ-(Sn)-Cl}2. The same lithium amide (1) gave with R3SnCl corresponding aminostannanes. Further reactions of these compounds with n-butyllithium gave the starting 1 and tetraorganostannanes. {2-(CH3)2NCH2]C6H4}2SnBr2 reacts with two equivalents of 1 to {2-(CH3)2NCH2]C6H4}2SnN(H)(2,6-i-Pr-C6H3)]2. The dimeric heteroleptic stannylene {(2,6-i-Pr-C6H3)(SiMe3)N](μ2-Cl)Sn}2 reacts with 2-(CH3)2NCH2]C6H4Li to the monomeric {2-(CH3)2NCH2]C6H4}SnN(2,6-i-Pr-C6H3)(SiMe3)]. The structure in the solid state and in solution and reactivity of products is also discussed. The unique decatin cluster has been isolated by hydrolysis of {(2,6-i-Pr-C6H3)(H)N]-μ-(Sn)-Cl}2. The structure of some compounds was also evaluated by theoretical DFT methods. |
| Keywords: | Tin(II and IV) compounds Bulky amino group C N-Chelating ligand DFT calculations |
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