13C, 15N and 119Sn NMR spectral evidence for tin five-coordination in triorganotin(IV) oxinates

Synthesis, characterization and biological studies of diorganotin(IV) complexes with tris[(hydroxymethyl)aminomethane] Schiff bases

“…The 1 H, 13 C and 119 Sn NMR spectral data of the Schiff base ligands and its diorganotin complexes are presented in Tables 1, 2 [39][40][41][42][43]. Also, these 119 Sn NMR chemical shift values are found to be in the similar range as those reported for the respective diorganotin complexes [44][45][46], indicating most of the diorganotin complexes are in a five-coordinated tin geometry except for compounds 1 and 7.…”

Synthesis, kinetics, and mechanism for adduct formation of tetraaza Schiff base cobalt(II) complexes with diorganotin(IV)dichlorides in dimethylformamide solvent

“…The studies of Holeĉek and coworkers show that the di-and tri-organotin 119 SnNMR spectra can be used as an indicator of the coordination number of the tin atom. In the ranges of +200 to −60, −90 to −190, −210 to −400, and −440 to −540 ppm, the coordination number of the tin atom is four, five, six, and seven, respectively [11][12][13][14]. The adducts formed in the present investigation exhibit the 119 Sn spectra in the range −110 to −182 ppm, suggesting that the tin atom is five coordinated (Table II).…”

Kinetic studies of the interaction between organotin(IV)chlorides and tetraaza Schiff bases: Synthesis and characterization of some novel tin(IV) Schiff base complexes

“…Holeĉek and coworkers' results show that in the diand triorganotin complexes, the 119 Sn NMR spectra can be used as an indicator of the coordination number of the tin atom. In the range of +200 to −60, −90 to −4190, −210 to −400, and −440 to −540 ppm, the coordination numbers of the tin are four, five, six, and seven, respectively [27][28][29][30]. The complexes in the present investigation exhibit the 119 Sn spectra in the range −240 to −270 ppm, suggesting that the tin atoms are six coordinate.…”