In the current proposal we would like to investigate the nature of magnetic ordering and crystal structure of Ti and Cu doped ferrimagnetic spinel MnCo2O4 using the powder neutron diffraction technique. Our preliminary magnetization measurements reveal a rather complex magnetic ordering in these systems with negative-magnetization, compensation-phenomena, exchange-bias effect and reduced Curie temperature. Therefore, a detailed Neutron diffraction studies are important for deeper understanding of the crystal structure, electronic and magnetic properties of Mn0.4Ti0.6Co2O4, Mn0.2Ti0.8Co2O4, and MnCo1.8Cu0.2O4. For comparison it is necessary to investigate the isostructural compound MnCo2O4, where different electronic states have been reported.