Luis Fernando Piedra-Garza - Jacobs University

described between chapters IV and IX where characterized by the methods just
mentioned.
Chapter V describes two isostructural polyanions which represent the first
examples of diethyltin functionalized polyaoxoarsenates and –phosphates that
constructs a non-planar 2-D surface in the solid state linked via Sn-O-W bridges
from only two of the three {Sn(C 2 H 5 ) 2 } 3 groups crafted to the trilacunary [A-α-
XW 9 O 34 ] n- unit, different to the structures reported in Chapter IV, where all three
organotin groups participated in the connectivity with other [A-α-XW 9 O 34 ] n-
building blocks, hence building a 3-dimensional assembly.
Chapter VI illustrates the most varied kinds of organotin functionalized
polyoxotungstates as well as the only example of an organotin-containing
isopolytungstate within this work. The first two species described in this chapter
are isostructural based on the trivacant [A-β-XW 9 O 33 ] 9- (X = Sb III , As III ) Keggin
polyanion forming a 1-D chain of dimmers with diethytin groups as linkers.
Another compound was obtained by interaction of the trilacunary lone-pair
containing nonatungstoarsenate Keggin polyanion towards diethyltin dichloride
in aqueous, acidic media at mild temperature conditions resulting in a novel
diethyltin functionalized polyoxometalates based in the trilacunary (B-β-
AsW 9 O 33 ) Keggin that forms a one-dimensional chain in the solid state via two
O-Sn-O(W) bridges. The first functionalized polyoxotungstate with dimethyltin
electrophiles based on the monovacant [P 2 W 20 O 70 (H 2 O) 2 ] 10- (P 2 W 20 ) polyanion is
also described in this chapter, whereas stoichiometric quantities of P 2 W 20 and
dimethyltindichloride in aqueous, acidic media resulted in 1-D chain of P2W20
units linked together by means of dimethyltin bridges. Finally, a novel
isohexatungstate isostructural of the one that Reinoso et al. synthesized with
dimethyltin (Reinoso, S.; Dickman, M. H.; Kortz, U. Inorg. Chem. 2006, 45, 10422)
was obtained by reaction of 3 equivalents of sodium tungstate dihydrated with
vi