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Issue 25, 2017
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Penta- and hexaorganostannate(iv) complexes based on O-heterocyclic ligands

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In the present study, the synthesis of homoleptic five- and six-coordinate heteroaryl tin(IV) compounds using two O-heterocyclic substituents, 2-furyl (2-fu) and 2-benzofuryl (2-fuBz) ligands is described. The compounds were obtained as their lithium salts [Li2(OEt2)2Sn(2-fu)6] (1), [Li(tmeda)2][Sn(2-fu)5] (tmeda = N,N,N′,N′-tetramethylethylenediamine) (2) and [Li(thf)4][Sn(2-fuBz)5] (3), featuring both an intramolecular coordination of the counterions by the anionic hypercoordinate tin(IV) species found in 1 as well as solvent separated cation/anion pairs for compounds 2 and 3. In addition, the co-crystalline complex [K2(thf)6Sn(2-fuBz)6]·[K2(thf)4Sn(2-fuBz)6] (4a·4b) was achieved. The characterization of all compounds by various spectroscopic methods and X-ray structural analysis complemented by density functional computations provided insights into the diversity of complex formation.

Graphical abstract: Penta- and hexaorganostannate(iv) complexes based on O-heterocyclic ligands

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Article information

13 Apr 2017
30 May 2017
First published
16 Jun 2017

Dalton Trans., 2017,46, 8279-8285
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Penta- and hexaorganostannate(IV) complexes based on O-heterocyclic ligands

I. Gebauer, D. Gräsing, J. Matysik, S. Zahn and K. Zeckert, Dalton Trans., 2017, 46, 8279
DOI: 10.1039/C7DT01336A

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