Abstract
Eight new adducts and derivatives have been synthesized and studied by infrared. Discrete, layered or infinite chain structures are suggested with an oxalate behaving as a monodentate, bidentate, monochelating or bichelating ligand, the environment around the tin centres being tetrahedral, cis trigonal bipyramidal or octahedral. In all the studied compounds, supramolecular architectures may be obtained when intermolecular hydrogen bonds are considered.
Highlights
The applications found for molecules belonging to halo- and organotin (IV) family [1,2] are the main reasons of the attempt by several research teams to obtain new molecules of this families for further biological tests [3,4]
For A we consider the adduct [Sn(C2O4)2.2SnPh2Cl2.2H2O ] which contains two types of tin centres: a central tin centre monochelated by two oxalates and linked to two water molecules, while the non coordinated oxygen atoms of the anions are linked to two SnPh2Cl2 molecules leading to octahedral environments; the third oxalate monochelates the third SnPh2Cl2: this leads to a two metallic components structure linked through cations via hydrogen bonds (Figure 1)
The compound B is obtained on replacing one water molecule of A by CyNH3Cl: so the structure of B derives from the one of A on substituting one water molecule by Cl-: the suggested structure is dimeric the third cation bridging the two monomers through NH...O hydrogen bonds this leads to a two metallic components structure linked through cations via hydrogen bonds (Figure 2)
Summary
The applications found for molecules belonging to halo- and organotin (IV) family [1,2] are the main reasons of the attempt by several research teams to obtain new molecules of this families for further biological tests [3,4]. Let us consider the infrared data of the studied adducts and derivatives: A: ν (NH3): 2937 (broad); νas (COO-): 1733 (s), 1617(vs); νs (COO-): 1245(s); ν(Ph): 1000 (vs) (t), 729-695 (vs) (d); B: ν (NH3): 2937 (broad); νas (COO-): 1617(vs); νs (COO-): 1215(vs); ν(Ph): 1000 (vs) (t), 729-695 (vs) (d); C: ν (H2O): 3400 (broad); ν (NH3): 2950 (broad); νas (COO-): 1700 (vs); νs (COO-): 1200 (vs); νas (SnMe3): 550 (w) D: ν (NH3): 2900 (broad); νas (COO-): 1615 (vs); ν(Ph): 1000 (w) (t), 730-692 (m) (d); E: ν (NH3): 3000 (broad); νas (COO-): 1630 (vs); ν(Ph): 1000 (w) (t), 710-692 (vs) (d); F: ν (NH3): 2900 (broad); νas (COO-): 1690 (vs); ν(Ph): 1000 (w) (t), 730-692 (vs) (d); ν (SnPh3OH): 900 (w); G: ν (NH3): 2937 (broad); νas (COO-): 1736 (s), 1620(vs); νs (COO-): 1271(s); ν(Ph): 1000 (s) (t), 728-696 (vs) (d); H: ν (H2O): 3400 (broad); ν(NH3): 2900(broad); νas (COO-): 1700 (vs); νas (SnBu2): 690(m); νs (SnBu2): 615 (vw).
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