Some tricyclohexyltin carboxylates containing germanium: synthesis, spectral and crystallographic characterization

Synthesis, characterization and biological activity of triorganotin 2-phenyl-1,2,3-triazole-4-carboxylates

“…The 119 Sn chemical shifts depended on the number and nature of alkyl or aryl groups coordinated with tin central atom. The values of the d( 119 Sn) for the compounds 1, 2 and 3 in CDCl 3 were À110.53, 18.74, and 105.12 ppm, respectively, and in agreement with four coordination structure [39][40][41].…”

“…The 3 J( 119 Sn-1 H) for 1 and 2 J( 119 Sn-1 H) for 3 were observed and the n J( 119 Sn-1 H) for 2 was not visible since the protons of cyclohexyl are multiplets in the range of 1.31-2.07 ppm. In chloroform solution, four n J( 119/117 Sn-13 C) (n = 1,2,3,4) for 1 and three n J( 119/ 117 Sn-13 C) (n = 1,2,3) for 2 and 3 were detected and the 1 J( 119/117 Sn-13 C) value was 642/614, 334/320 and 354/ 338 Hz, respectively, which was close to that for the corresponding triorganotin carboxylates [27,39,40]. This result indicated that compounds 1, 2 and 3 were four-coordinated in solution.…”

“…The difference between the m as (CO 2 ) and m s (CO 2 ) bands, Dm(CO 2 ), was indicative of the coordination number around tin [35]. The Dm(CO 2 ) values for 1, 2 and 3 are 145, 239 and 332 cm À1 , respectively, which suggested that compound 1 had a five-coordinate structure in solid [27,36,37] and the presence of a monodentate carboxylate ligand and four-coordinated tin in compound 2 and 3 [38][39][40].…”

In vitro anti-leishmanial activities of germatranyl and Silicon incorporated diorganotin derivatives: Synthesis and spectroscopic properties

“…All the chemicals used were of reagent grade and all organic solvents were dried prior to use according to the reported methods [16]. For the details of apparatus and instruments used see elsewhere [14,15,17].…”

“…Germatranes have been examined for their neurotropic, antitumour, and radioprotective properties [8]. The existence of co-relation between the bioactive properties of organogermanium and organotin compounds and the close analogy between the organic chemistry of germanium and silicon paved the way for the syntheses of useful mixed metal complexes [9][10][11][12][13][14].…”