All air stable organoruthenium(II) complexes having general formula [RuH(L1)(Pf3)n(LH)n1 Cl] (Where L1 =CO/CS, n=1&2 & n1=1&2) with
1-metatolyl tetrazoline-5-thione (1-mt T-5-TH) and 1-benzoyl tetrazoline-5-thione (1-BT-5-TH) have been prepared and characterized by various physico-chemical methods. These complexes are found to be diamagnetic in nature and non-electrolytic behavior in DMF solutions. Tentative octahedral configuration has been assigned to all Ru(II) complexes on the basis of normal co-ordinate analysis.