1079945-89-3Relevant academic research and scientific papers
Assembly of tetra, di and mononuclear molecular cadmium phosphonates using 2,4,6-triisopropylphenylphosponic acid and ancillary ligands
Chandrasekhar, Vadapalli,Sasikumar, Palani,Boomishankar, Ramamoorthy
, p. 5189 - 5196 (2008)
The reaction of ArPO3H2 (Ar = 2,4,6-iPr 3-C6H2) with Cd(CH3COO) 22H2O using various co-ligands such as methanol, dimethylformamide (DMF) and 3,5-dimethylpyrazole (DMPZH) resulted in the formation of tetranuclear assemblies [Cd4(ArPO3) 2(ArPO3H)4(CH3OH) 4]3(CH3OH) (1), [Cd4(ArPO 3)2(ArPO3H)4(DMF) 4]3(DMF) (2) and [Cd4(ArPO3) 2(ArPO3H)4(DMF)2(DMPZH) 2]2(DMF)2(H2O) (3). In all of these compounds the tetranuclear cadmium array, containing two five-coordinate and two six-coordinate cadmium atoms, is held together by two μ4 capping [ArPO3]2- and four anisobidentate μ2 [ArPO2(OH)]- ligands. Each cadmium atom is bound to an additional ancillary ligand. The reaction of ArPO3H2 with Cd(CH3COO)22H2O in the presence of the chelating ligand 2,2′-bipyridine (bipy) leads to the exclusive formation of the dinuclear assembly [Cd2(ArPO3H)4(bipy) 2](CH3OH)(H2O) (4). The latter contains an eight-membered Cd2P2O4 inorganic ring formed as a result of the bridging coordination action of two anisobidentate μ2 [ArPO2(OH)]- ligands. Each cadmium atom is bound by one chelating bipy and one monodentate [ArPO2(OH)] - ligands. Use of four equivalents of 3,5-dimethylpyrazole leads to the formation of the mononuclear derivative [Cd(ArPO3H) 2(DMPZH)4] (5). The molecular structure of the latter comprises of a central cadmium atom surrounded by six monodentate ligands. Four of these are neutral pyrazole ligands that occupy the equatorial plane; the remaining two are anionic phosphinate ligands which are present trans to each other. The thermal analysis of 1 and 4 reveals that the char residue obtained at 600 °C consists predominantly of Cd2P2O7. The Royal Society of Chemistry 2008.
