The independent yields of the isotopes 131,132Sn and 131–133Sb from the reactor neutron induced fission of 232Th were measured. Tin and antimony were chemically separated as hydrides and the decay or the growth and decay of their γ-ray spectra were followed. The independent yields of 131,132Sn and 132,133Sb were obtained by a direct measurement, while the yield of 131Sb was derived from the corresponding measured isobaric yield and the respective chain yield. An enhancement of yield of ∼70% was found for the closed neutron shell nucleus ( 132Sn) while the other measured nuclei showed either an enhancement or a decrease, i.e. a proton odd-even effect of ∼30%. The contribution of the data to the fission yields system of Z = 90–98 is discussed. The odd-even systematics is discussed according to previous studies, while the neutron shell effect is examined with regard to the primary mass split and the neutron emission probabilities.