13C and 119Sn NMR spectra of some tribenzyltin(IV) compounds

Synthesis and characterization of tribenzyltin(IV) and dibenzyltin(IV) complexes of 2-{[(2Z)-3-hydroxy-1-methyl- 2-butenylidene]amino}acetic acid: Crystal structure of tribenzyl{2-{[(2Z)-3-hydroxy-1-methyl-2-butenylidene] amino}acetato}tin(IV)

“…The compound 1 in a non-coordinating solvent (deuterochloroform) exhibited the δ( 119 Sn) value as a sharp singlet at 0.82 ppm. The value found for 1 falls within the range + 55.0 to − 25.0 ppm specified for four-coordinate tribenzyltin species in solution [12]. This indicates that the five-coordinate dimeric structure of the solid (see X-ray discussion, vide infra) breaks up in solution.…”

Karplus‐Type Dependence of Vicinal 119Sn‐13C and 119Sn‐1H Spin‐Spin Couplings in Organotin(IV) Derivatives: A DFT Study

“…[5][6][7][8][9][10][11] However, despite the large δ( 119 Sn) chemical shift range of organotin(IV) compounds, ca. 600 ppm ranging from tetra-to hexacoordinate tin, and the various factors [ influencing the 119 Sn chemical shift, e.g., solvent effects, self-association and temperature, the latter may not be sufficient for a full structural characterization.…”

“…However structural trends in these compounds could be inferred from the δ( 13 C) and the n J( 119 Sn, 13 C) (n = 1,2,3,4) couplings of the phenyl and benzyl groups and, only for the tribenzyltin(IV) derivatives, from the 2 J( 119 Sn, 1 H). [9,11] 3 J( 119 Sn, X) (X = 1 H, 2 H, 13 C) play a very important role in organotin(IV) conformational studies, somehow mirroring the distinctive role that the Karplus dependence of 3 J( 1 H, 1 H) on the dihedral angle holds in structure elucidation of organic molecules. Also in this case some empirical relationships have been reported.…”

Synthesis and characterization of new organotin(IV) complexes with polyfunctional ligands

“…In the methyltin(IV) derivative 3 the tin-proton coupling constants 2 J( 117 Sn, 1 H) and 2 J( 119 Sn, 1 H) are 73.0 and 77.0 Hz, falling in the range for five-or six-coordinated species [37]. The 119 Sn chemical shift of 3 falls at À472.4 ppm, providing an additional support for six-coordinated tin atom [38] (Fig. 2), with the donor acting as N,N 0 -bidentate chelating ligand [26].…”