Electrospray ionization in the characterization of mer and fac isomeric forms of [Re(N)Cl2(POP)] (POP = bis[(2-diphenyl-phosphino)ethyl]ether)

............. In this connection we have been working on a new class of asymmetric nitrido-Tc(V) and -Re(V) heterocomplexes of the general formula [Re(N)(PXP)(L-L?)]+/0, where PXP denotes a symmetrical diphosphine incorporating a heteroatom in the spacer, and L-L? is an asymmetric bidentate ligand.7, , 8 During the synthesis of these mixed-ligand compounds we have isolated intermediate octahedral species of the type [M(N)Cl2 (POP)], where POP is bis[(2-diphenylphosphino)ethyl]ether..................