Structural assignment of organotin hydrides containing the oxazoline ligand

In the corresponding triorganotin hydrides and diorganotin dihydrides containing the optically active 2-(4-isopropyl-2-oxazolinyl)-5-phenyl ligand values of the 1J(1H-117/119Sn) couplings appeared to be temperature dependent, supporting a pseudo-axial/equatorial position of the hydrogen attached to the tin.