“…Although a handful of Mn(I) [4][5][6][7] and Re(I) [8][9][10][11][12] complexes of dithiophosphinate ½R 2 PS 2 À ligands can be identified in the literature, yet those of their selenium analog, namely Mn/Re complexes of diselenophosphinate ½R 2 PSe 2 À have not been reported. However, some Mn and Re metallacycles formed by the chelating, selenoimidodiphosphinate ligand, N(SePPh 2 ) 2 , are known [13][14][15][16].…”