Two new 1-D dicyanamide bridged polymeric complexes [Mn( mu,(1,5)-dca)(2)(salicyh)(2)](n) and {[Ni( mu 1,5-dca)(TTA)](ClO4)}(n) (dca = dicyanamide, N(CN)(2)(-); salicyh = salicylic hydrazide; TTA = triethylenetetramine): Synthesis, structures and mag

摘要

Two new dicyanamide bridged complexes [Mn(mu(1,5)-dca)(2)(salicyh)(2)](n) (1) and {[Ni(mu(1,5)-dca)(TTA)](ClO4)}(n) (2) (dca = dicyanamide, N(CN)(2)(-); salicyh = salicylic hydrazide; TTA = triethylenetetramine) have been synthesised and structurally characterised. Both the compounds 1 and 2 consist in 1-D coordination polymers. In 1 the manganese atoms are doubly bridged by mu(1.5)-dca ligands, whereas in 2 the nickel atoms are bridged by a single mu(1,5)-dca ligand. The magnetic measurements indicate that whereas intrachain interactions take place between the metal ions for compound 1 (J = -0.26 cm(-1)), no evidence for any exchange coupling is found for compound 2. (c) 2005 Elsevier B.V. All rights reserved.