Selected experimental results retrieved from ⁹⁸Mo (¹⁶O, xnyp) reaction are discussed and compared with the up-to-day known data. The collective configurations in selected Z=48--50, N=55--66 nuclei are presented in terms of Cranked Shell Model (CSM) and rigid rotor description. The special interest was put on: (1) Systematical behaviour of intruder bands especially for low spin levels, (2) The collective, strongly coupled bands, where the band members are connected by Delta I=1 transitions, (3) Smooth band termination in the A=104--120 mass region.

PACS numbers: 27.60.+j