10.1021/cm030442k.s004 Deyuan Kong Deyuan Kong Yang Li Yang Li Xiang Ouyang Xiang Ouyang Andrey V. Prosvirin Andrey V. Prosvirin Hanhua Zhao Hanhua Zhao Joseph H. Ross, Joseph H. Ross, Kim R. Dunbar Kim R. Dunbar Abraham Clearfield Abraham Clearfield Syntheses, Structure, and Magnetic Properties of New Types of Cu(II), Co(II), and Mn(II) Organophosphonate Materials:  Three-Dimensional Frameworks and a One-Dimensional Chain Motif American Chemical Society 2004 2. unit cell parameters Mn Compound Cu 3 NH 2 crystallize H 2 O phosphate oxygen atoms organophosphonic acid H 2 O 3 PCH 2 NH 2 terminal oxygen atom CH 2 PO 3 CH 2 PO 3 H Compound Co 3 space group P 2 1 2 1 2 space group Pbca ion 2004-08-10 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Syntheses_Structure_and_Magnetic_Properties_of_New_Types_of_Cu_II_Co_II_and_Mn_II_Organophosphonate_Materials_Three_Dimensional_Frameworks_and_a_One_Dimensional_Chain_Motif/3329224 The hydrothermal syntheses, structures, and magnetic properties of the Cu(II), Co(II), and Mn(II) complexes with organophosphonic acid H<sub>2</sub>O<sub>3</sub>PCH<sub>2</sub>NH<sub>2</sub><sup>+</sup>CH<sub>2</sub>PO<sub>3</sub>H<sup>-</sup> are reported. Compound Cu<sub>3</sub>[NH<sub>2</sub>(CH<sub>2</sub>PO<sub>3</sub>)<sub>2</sub>]<sub>2</sub> (<b>1</b>) crystallizes in the orthorhombic space group <i>Pbca</i>, with unit cell parameters <i>a</i> = 9.4430(10) Å, <i>b</i> = 9.3681(10) Å, <i>c</i> = 16.0755(17) Å, <i>V</i> = 1422.1(3) Å<sup>3</sup>, and <i>Z</i> = 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 <b>1</b> was observed at 15 K, followed by ferromagnetic ordering at 9 K. Compound Co<sub>3</sub>[NH<sub>2</sub>(CH<sub>2</sub>PO<sub>3</sub>)<sub>2</sub>]<sub>2</sub> (<b>2</b>) crystallizes in the orthorhombic space group <i>P</i>2<sub>1</sub>2<sub>1</sub>2 with unit cell parameters <i>a</i> = 10.7346(8) Å, <i>b</i> = 13.3704(10) Å, <i>c</i> = 5.3699(4) Å, <i>V</i> = 770.72(10) Å<sup>3</sup>, and <i>Z</i> = 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, thus creating tetranuclear 16-membered rings. Compound Mn{[NH<sub>2</sub>(CH<sub>2</sub>PO<sub>3</sub>H)<sub>2</sub>]<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>} (<b>3</b>) crystallizes in the monoclinic space group <i>P</i>2<sub>1</sub>/n, with unit cell parameters <i>a</i> = 7.3668(11) Å, <i>b</i> = 8.1540(12) Å, <i>c</i> = 14.090(2) Å, <i>β</i> = 103.935(2)°, <i>V</i> = 821.4(2) Å<sup>3</sup>, and <i>Z</i> = 2. Four phosphate oxygen atoms and two water molecules are coordinated to the mononuclear octahedral Mn(II) ions. The amino groups are protonated and therefore do not coordinate to Mn(II). Compound <b>3</b> features a one-dimensional chain architecture stitched together by hydrogen bonds.