Cd2+ Complexation with P(CH2OH)3, OP(CH2OH)3, and (HOCH2)2PO2 –: Coordination in Solution and Coordination Polymers

• Published in: Inorganic chemistry Vol. 51; no. 18; pp. 9995 - 10003
• Main Authors: Anyushin, Alexander V, Mainichev, Dmitry A, Moroz, Nikolay K, Abramov, Pavel A, Naumov, Dmitry Yu, Sokolov, Maxim N, Fedin, Vladimir P
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 17.09.2012
• ISSN: 0020-1669; 1520-510X
• DOI: 10.1021/ic3014283

The coordination of Cd2+ with P(CH2OH)3 (THP) in methanol was followed by 31P and 111Cd NMR techniques. A cadmium-to-phosphine coordination ratio of 1:3 has been established, and effective kinetic parameters have been calculated. Air oxidation of THP in the presence of CdCl2 at room temperature produces coordination polymer 3 ∞[Cd3Cl6(OP(CH2OH)3)2] (1). The same oxidation reaction at 70 °C gives another coordination polymer, ∞[CdCl2(OP(CH2OH)3)] (2). Complexes 1 and 2 are the first structurally characterized complexes featuring OP(CH2OH)3 as a ligand that acts as a linker between Cd atoms. The addition of NaBPh4 to the reaction mixture gives coordination polymer ∞[Na2CdCl2(O2P(CH2OH)2)2(H2O)3] (3) with (HOCH2)2PO2 – as the ligand. Coordination polymers 1–3 have been characterized by X-ray analysis, elemental analysis, and IR spectroscopy.