Collect. Czech. Chem. Commun. 2006, 71, 294-301

Unexpected Products in Reactions of Double-C,N-Chelated Diorganotin(IV) Dibromide with Cyclopentadienyl- and Fluorenyllithium

Zdeňka Padělkováa, Ivana Císařováb, Aleš Růžičkaa,* and Jaroslav Holečeka

a Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, nám. Čs. legií 565, CZ-532 10 Pardubice, Czech Republic
b Department Inorganic Chemistry, Charles University, Faculty of Science, Hlavova 2030, 128 40 Prague 2, Czech Republic


From the reactions of bis{2-[(dimethylamino)methyl]phenyl}tin(IV) dibromide with two equivalents of cyclopentadienyl- or fluorenyllithium in THF, unexpected products [2-(CH3)2NCH2C6H4]2Sn(μ-η11-C5H4)(μ-O)Sn[2-(CH3)2NCH2C6H4]2 (2) and [2-(CH3)2NCH2C6H4]2Sn(OC13H9)Br (3), respectively, were isolated. These compounds were characterized by elemental analysis, NMR and X-ray diffraction techniques. The tin atoms in 2 are pseudotetrahedrally coordinated, each of them by two carbons of ligand, oxygen and the bridging carbon originated from μ-η11-planar cyclopentadienyl moiety. The geometry of 3 is described as a distorted tetragonal pyramid with both ligand carbon atoms, bromine and one of nitrogen atoms in the base and oxygen atom in the vertex position.

Keywords: Stannanes; Organotin(IV) compounds; C,N-ligands; Cyclopentadienyl ligands; Fluorene; Oxygen abstraction; X-Ray diffraction; Crystal structure.

References: 30 live references.