1D Metal-Pyrimidine chain with antiferromagnetic coupling and spin-canting behavior

摘要

Two isostructural compounds [M(hpmc)(phen)(H2O)] [M = Mn (1), Co (2); H2hpmc = 6-hydroxypyrimi-dine-4-carboxylic acid, phen = 1,10-phenanthroline] were synthesized by the in-situ hydrothermal reactions of 6-chloropyrimidine-4-carboxylic acid (Clpmc) with Mn" and Co" ions, in which the metal centers are bridged by pyrimidine ring to form 1D chain. Magnetic studies indicate pyrimidine can transmit antiferromagnetic coupling and the Co" complex shows spin-canting behavior below 3.5 K.