Tin(II) complexes with 8-hydroxyquinolinate in solid state have been obtain
ed by adding aqueous ammonium to a solution containing stannous chloride an
d 8-hydroxiquinoline in medium of HCl and acetone up to pH 5 and 9, respect
ively. The products obtained show the same composition, Sn(C9H6ON)(2); howe
ver there are some differences regarding both the thermal behaviour in an o
xidant atmosphere and morphology. These products were characterised by elem
ental and complexometric analysis, TG and DTA curves, infrared and X-ray di
ffractometry. TG curves show, above 448 K, the partial oxidation on air atm
osphere of Sn(II) complexes to Sn(IV) complexes, SnO(C9H6ON)(2). This behav
iour does not depend only on pH in which the compounds were obtained but al
so on the heating rate in TG curves. Sn(II) complexes volatilise almost com
pletely on nitrogen atmosphere and partially on air atmosphere depending on
the oxidation degree of the compound.