Abstract
The hydrothermal syntheses, structures, and magnetic properties of the Cu(II), Co(II), and Mn(II) complexes with organophosphonic acid H2O3PCH2NH2+CH2PO3H- are reported. Compound Cu3[NH2(CH2PO3)2]2 (1) crystallizes in the orthorhombic space group Pbca, with unit cell parameters a = 9.4430(10) A, b = 9.3681(10) A, c = 16.0755(17) A, V = 1422.1(3) A3, and Z = 4. The X-ray crystallographic determination reveals copper ions in two different coordination environments that are bridged by one terminal oxygen atom to form a three-dimensional framework of corner-sharing layers. Antiferromagnetic coupling between the two types of Cu units in 1 was observed at 15 K, followed by ferromagnetic ordering at 9 K. Compound Co3[NH2(CH2PO3)2]2 (2) crystallizes in the orthorhombic space group P21212 with unit cell parameters a = 10.7346(8) A, b = 13.3704(10) A, c = 5.3699(4) A, V = 770.72(10) A3, and Z = 2. All Co(II) ions are in a tetrahedral environment with both ends of the ligand bound via O atoms to adjacent Co(II) ions...
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