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Abstract: Three new heterobimetallic cyanide-bridged complexes, { [ Ni (L 1) ] [ Ag(CN) 2] } [ Ag(CN) 2] · 2H 2O (2), { [ Mn (L 2) ] [ Ag(CN) 2] } · 1.5 H 2O (3) and {[Mn(L3)(H2O)]2[Ag(CN)2]}ClO4·2H2O (4) (L 1= 2,7,12-trimethyl-3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),13,15-triene; L 2 = N,N?-1,3-propylene-bis(5-chlorosalicylideneiminate); L 3 = N,N?-1,2-propylene-bis(5-bromosalicylideneiminate)), have been assembled using for the first time a new polyaza macrocycle nickel(II) compound [Ni(L1)](ClO4)2(1), or Schiff-base manganese(III) compounds and K [ Ag(CN) 2]. Single crystal X-ray diffraction analysis reveals that complexes 2 and 3 can be characterized as one-dimensional cationic and neutral single chain structure, respectively. Complex 3 forms a three-dimensional network via weak inter-chain Ag..Ag interactions. Complex 4 belongs to a cyanide-bridged bimetallic sandwich-like cationic trinuclear structure containing Mn 2Ag core with free ClO4- as a counter anion, indicating that the Schiff-base ligand has an obvious influence on the structure of the cyanide-bridged complexes formed. Investigation of the magnetic susceptibilities of the cyanide-bridged Ag-Ni(II)/Mn(III) complexes showed the weak anti-ferromagnetic interaction between neighboring paramagnetic Ni(II) or Mn(III) ions bridged by the long NC-Ag-CN unit. From the best-fit of the magnetic susceptibility data of complexes 2 and 4 the magnetic coupling constant was determined to be J= – 0.51 and -0.78cm-1, respectively. Graphical Abstract : SYNOPSIS Three new heterobimetallic cyanide-bridged complexes with 1D or polynuclear structures were assembled from polyaza macrocycle nickel(II) or manganese(III) Schiff-base with K [ Ag(CN) 2] as building block. Investigation over the magnetic susceptibilities of the cyanide-bridged Ag-Ni(II)/Mn(III) complexes showed weak antiferromagnetic interaction between neighboring Ni(II) or Mn(III) ions bridged by the NC-Ag-CN unit.[Figure not available: see fulltext.].
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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI