Hydrogen-Bond Directed 1D and 3D Cyanide-Bridged Heterometallic Complexes: Synthesis, Crystal Structures and Magnetic Properties

By employing K-2[Pd(CN)(4)] as building block, [Mn(L)(H2O)(2)]ClO4 or Mn(Phen)(2)Cl-2 (L = N,N-ethylene-bis(3-methoxysalicylideneiminate; Phen = 1,10-phenanthroline) as assembling segment, a trinuclear cyanide-bridged heterometallic Pd(II)-Mn(III) complex {[Mn(L)(H2O)](2)[Pd(CN)(4)]}(2)center dot 4H(2)O (1) and a ion-pair complex [Mn(Phen)(2)(H2O)(2)][Pd(CN)(4)] (2) have been synthesized and characterized by elemental analysis, IR spectroscopy and X-ray structure determination. Single X-ray diffraction analysis reveals the cyanide-bridged trinuclear complex 1 is self-complementary through coordinated aqua ligands from one complex and the free O-4 compartments from the neighboring complex, therefore giving 1D single chain supramolecular structure. For complex 2, it is constructed into interesting 3D network depending on the intermolecular O center dot center dot center dot H-N hydrogen bond interactions. Investigation over magnetic susceptibility of complex 1 reveals the overall weak antiferromagnetic coupling between the adjacent Mn(III) ions. With [Pd(CN)4](2-) as cyanide building block and bicompartimental schiff-base manganese(III) compound or Mn(II)-phenanthroline compound as assembling segment, one heterobimetallic cyanide-bridged trinuclear clusters and one heterobimetallic ion-pair complex have been synthesized and characterized by elemental analysis, IR spectroscopy and X-ray structure determination, in which the trinuclear complex 1 is self-assembled into one-dimensional chain structure by the intermolecular O-Ha <-O hydrogen bond interactions, while the ion-pair complex 2 is linked into interesting three-dimensional network supramolecular structure by the intermolecular O-Ha <-N hydrogen bond interactions.The trinuclear structure (top) and 1D single chain structure (bottom) constructed by intermolecular hydrogen bond interactions for complex 1.The crystal structure of ion-pair complex 2 (top) and its three-dimensional supramolecular structure constructed by intermolecular O-Ha <-N hydrogen bond interactions (a axis (top), b axis (middle), c axis (bottom)).The magnetic property of complex 1.