[en] A simple description of the even Sb isotopes, for which no calculations have been published earlier, is that of a proton coupled to a number projected neutron quasiparticle wave function, assuming a Z=N=50 core. Such a calculation was performed for ^112114116Sb, for which nuclei sufficient experimental information is available. The spectra and transition rates were calculated in shell-model spaces consisting of five and eight subshells and using a Gaussian Serber force. The shell-model parameters were derived from experimental data of the adjacent nuclei. A large number of low-lying levels, their branching ratios and half-lives were calculated. Reasonable agreement with experimental data is obtained. The calculated magnetic moments of the isomeric 8^- states do not show the experimental trend however. Spectroscopic factors for the (³He,d) reaction on ¹¹⁵Sn are predicted. Their experimental determination would be another helpful test of the interpretation given. (Auth.)