Syntheses,Structures And Properties Of Chiral Cyanide-Bridged Heterometallic Complexes

In this work,the chiral ligand 1,2-cyclohexanediamine was introduced into the[M^II?L?_m]ⁿ⁺cationic template to form paramagnetic cationic complexes[M^II?1R,2Rchxn?₃]²⁺and[M^II?1S,2Schxn?₃]²⁺?M=Cu,Ni?.By using[M^V/IV?CN?₈]^3-/4-?M=Mo,W?and[Fe^II/III?CN?₆]^4-/3-as bridging ligands,we synthesized eleven heterometallic complexes with different bridging modes.All the complexes were characterized by IR,and some of them were characterized by magnetic susceptibility,and CD spectra analysis.The specific contents are shown as follows:With cyanide bridges from the ligand[M^V?CN?₈]^3-?M=Mo?W?and[Cu?1R,2Rchxn?₂]²⁺,[Cu?1S,2Schxn?₂]²⁺as building blocks,four complexes were 2D coordination polymers with{12³}₂{12}₃ topology.CD spectra analysis indicates that they all have optical activity.Magnetic studies revealed the ferromagnetic interaction between paramagnetic ions through cyanide bridges in complexes 1,3,and 4 and the antiferromagnetic interaction between paramagnetic ions through cyanide bridges in complex 2.With cyanide bridges from the ligand[M^V?CN?₈]^3-?M=Mo?W?and[Ni?1R,2Rchxn?₂]²⁺or[Ni?1S,2Schxn?₂]²⁺as building units,complexes 5 and 6 were 3D coordination polymers with{12}{8⁴·12⁶}₂{8}₄ topology.Complexes 7 and 8 were 3D coordination polymers with{12⁶}{12}₂ topology.CD spectra analysis indicates that they all have optical activity.Magnetic studies revealed the ferromagnetic interaction between paramagnetic ions through cyanide bridges in compounds 5 and 6.With cyanide bridges from the bidentate ligand[Fe^III?CN?₆]^3-and tetradentate liand[Fe^II?CN?₆]^4-,and based on the building blocks of[Cu?1R,2Rchxn?₂]²⁺or[Cu?1S,2Schxn?₂]²⁺,two dimer complexes and one complex with 3D network structure were synthesized.CD spectra analysis indicates that complexes 9 and 10 have optical activity.Magnetic studies revealed the ferromagnetic interaction between paramagnetic ions through cyanide bridges in complexes 9 and 10.