Energy spectra, B(E2) values, and ratios of the neutron-rich even-even Mo isotopes in the mass 100 region have been investigated in terms of the neutron-proton interacting boson model. Two different approaches were used. The first investigation is based on the validity of the Z =38 subshell closure considering "Sr as a doubly magic core. In the second calculation Z =50 and N =50 were considered as valid closed shells leading to ' Sn as a core. The results from both calculations are compared with experimental data.PACS number(s): 21.60. Fw, 23.20.Lv, 23.20.g, 27.60.+ j