Geometric isomers of di­chlorido­iron(III) com­plexes of CTMC (5,7,12,14-tetra­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne)

Both trans and cis iron–CTMC com­plexes, namely, trans-di­chlorido­[(5SR,7RS,12RS,14SR)-5,7,12,14-tetra­methyl-1,4,8,11-tetra­aza­cyclo­tetra­deca­ne]iron(III) tetra­chlorido­ferrate, [Fe(C(14)H(32)N(4))Cl(2)][FeCl(4)] (1a), the analogous chloride methanol monosolvate, [Fe(C(14)H(32)N(4))Cl(2)]Cl·CH(3)OH (1b), and cis-di­chlo­rido­[(5SR,7RS,12SR,14RS)-5,7,12,14-tetra­methyl-1,4,8,11-tetra­aza­cyclo­tetra­dec­ane]iron(III) chloride, [Fe(C(14)H(32)N(4))Cl(2)]Cl (2), were successfully synthesized and structurally characterized using X-ray diffraction. The coordination geometry of the macrocycle is dependent on the stereoisomerism of CTMC. The packing of these com­plexes appears to be strongly influenced by extensive hydro­gen-bonding inter­actions, which are in turn determined by the nature of the counter-anions (1a versus 1b) and/or the coordination geometry of the macrocycle (1a/1b versus 2). These observations are extended to related ferric cis- and trans-di­chloro macrocyclic com­plexes.