Electromagnetic properties of odd-odd transitional nuclei with A≈ 100 are investigated experimentally and theoretically. Nanosecond isomers are studied in-beam by means of delayed γγ-coincidences and the generalized centroid-shift method. The reactions 98Mo+30MeV 7Li and 92,94Mo+ 50 MeV 12C are utilized. Following half-lives are determined: T 1 2 (547.2 keV in 102Rh) = 0.25±0.07ns, T 1 2 (243.1 keV in 102Rh) = 0.30±0.10ns, T 1 2 (181.1 keV in 99Tc) = 3.8 ± 0.3ns, T 1 2 (2902.0keV in 104Cd) = 0.6±0.1 ns, T 1 2 (118.7keV in 103Pd) =0.8±0.2 ns, T 1 2 (131.1 keV in 105Cd) = 1.5 ±0.3 ns, T 1 2 (211.8 keV in 104Ag) = 1.4±0.1 ns, T 1 2 (181.0 keV in 102Ag) = 3.5±0.2 ns. Additionally, several upper limits of level lifetimes are derived. The systematics of E1, M1 and E2 transition rates in 100,102,104Rh and 102,104,106Ag is presented and discussed. Fast M1 transitions within the 2qp π g ̃ 9 2 ν h ̃ 1 2 band appear to be associated with the strong coupling of the π g ̃ 9 2 proton and the rotational alignment of the h ̃ 11 2 neutron. Extensive IBFFM calculations of level energies and electromagnetic properties of 106Ag as a typical case demonstrate that this model could account for the complex structural pattern of this type of nuclei. NUCLEAR REACTIONS 98Mo( 7Li, 3n), ( 7Li2nα), E=30 MeV; 92,94Mo( 12C, pn), 94Mo( 12C, 2n), ( 12C, 2pn), E = 50 MeV; measured E γ , I γ , γγ( t). 102Rh, 99Tc, 102,104Ag, 104Cd,