THE PHOTOLYSIS OF BENZYLTIN COMPOUND INVESTIGATED BY 1H CIDNP

Article abstract of DOI:10.1016/0022-328X(87)85022-2

The photochemical decomposition of (PhCH2)3SnMe and (PhCH2)3SnCl has been investigated by steady-state and time-resolved chemically induced nuclear polarization (CIDNP) ¹H spectroscopy of the methylene protons using 308 nmp ulses of an excimer laser and a 250 MHz NMR spectrometer.From the sign of the polarization it is concluded that (PhCH2)3SnMe reacts like other comparable tin compounds via triplet radical pairs; the CIDNP effects are not influenced by the solvent.In contrast the CIDNP effects of (PhCH2)3SnCl are solvent dependent: in C6D6 the polarization is accounted for by a singlet radical pair precursor, while in CDCl3 both singlet and triplet radical pairs are formed.The formation of singlet radical pairs during the reaction of (PhCH2)3SnCl in C6D6 may be interpreted as evidence for stannylene formation.