Simple linear-chain cobalt phosphates

Two simple one-dimensional cobalt phosphates containing linear chains of co rner-shared 4-membered rings have been synthesized hydrothermally by the re action between amine phosphates and cobalt(II) ions under non-aqueous condi tions. The linear chains are held together by hydrogen bond interactions in volving the hydrogens of the amine and the framework oxygens. The two cobal t phosphates reported are the first linear chain compounds discovered in th e family of open-framework transition metal phosphates.