“…Comment 4-Nitrophenoxyacetic acid, whose crystal structure has been reported previously (Kumar & Rao, 1980), is a pesticide intermediate used in the synthesis of fungicides and plantgrowth regulators (Xue & Zou, 1999). Complexes of 4-nitrophenoxyacetic acid and metal ions (M = Cu and Sn) have been structurally characterized (Prout et al, 1975;Tian et al, 2006). We report a new complex synthesized by the reaction of 4nitrophenoxyacetate and cobalt(II) nitrate in aqueous solution.…”