Magnitudes and relative signs of J(119Sn, 13C) and J(119Sn,H) coupling constants in some organotin(IV) compounds using 2D NMR methods

✍ Scribed by Antonín Lyčka; Josef Jirman; Jaroslav Holeček

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 317 KB
• Volume: 29
• Category: Article
• ISSN: 0749-1581
• DOI: 10.1002/mrc.1260291209

✦ Synopsis

Abstract

Two‐dimensional H,C‐COSY spectra of some tetra‐, penta‐ and hexa‐coordinated organotin(IV) compounds were measured. The relative signs of ^n^J(^119^Sn,^13^C) and (^n+1^ J(^119^Sn,^1^H) coupling constants were determined after analysis of the orientation of the appropriate ^119/117^Sn satellites in the H,C–COSY spectra. The relative signs in Bu~n~Sn and Bz~n~Sn (n = 2 or 3) derivatives are opposite, whereas in Ph~3~Sn derivatives these signs are the same for carbon atoms in the ortho and meta positions and opposite for carbon atoms in the para positions. The same sign was found for ^2^J(^119^Sn,^13^C‐2) vs. ^2^J(^119^__Sn__C^1^H~2~) in tribenzyltin(IV) chloride from the COLOC spectrum.