79084-39-2Relevant articles and documents
Synthesis of novel spirocyclic penta- and hexacoordinated germanium(IV) complexes
Sau, Arjun C.,Holmes, Robert R.
, p. 4129 - 4135 (2008/10/08)
The reactions of GeCl4 with catechol, 3,5-di-tert-butylcatechol, and toluene-3,4-dithiol in the presence of triethylamine have been investigated. The spirocyclic derivatives isolated from these reactions are Ge(C6H4O2)2·2H2O (5), [(Cl)Ge(C14H20O2)2][Et 3NH] (14), and Ge(C7H6S2)2 (4). Physical properties and solubility behavior of 4 and 5 suggest a polymeric structure. The complex 14 contains pentacoordinate germanium(IV). This complex reacts with water to form the corresponding hydroxy derivative, [(OH)Ge(C14H20O2)2][Et 3NH] (15). Reaction of GeCl4 with catechol in triethylamine only and the reaction of 5 with triethylamine give rise to the exclusive formation of a spirocyclic hexacoordinated Ge(IV) complex, [Ge(C6H4O2)3][Et3NH] 2 (10). A metathesis reaction of 10 with Et4N+Cl- leads to the formation of [Ge(C6H4O2)3][Et4N] 2 (11). A similar reaction of 14 with Et4N+Cl- in the presence of water gives [(OH)Ge(C14H20O2)2][Et4N] (16). Several novel spirocyclic pentacoordinated Ge(IV) complexes have been prepared by the reaction of 4 and 5 with halide ions and characterized by 1H NMR spectroscopy. The chemical properties, in particular the hydrolytic behavior of these complexes, are discussed.
