51732-57-1Relevant articles and documents
Triphenyltin(iv) adducts of diphosphoryl ligands: Structural, electronic and energy aspects from X-ray crystallography and theoretical calculations
Gholivand,Gholami,Ebrahimi,Abolghasemi,Esrafili,Fadaei,Schenk
, p. 17482 - 17492 (2015)
Some triphenyltin(iv) adducts with a family of diphosphoryl ligands, RR′P(O)-X-P(O)RR′ (R = OPh, Ph, R′ = R, An (aniline)) and X = 1,4-OC6H4O, 1,4-OC6H4NH, 1,4-NHC6H4NH 1,4-(NHCH2)2C6H4, 1,3-(NHCH2)2C6H4 and piperazine have been synthesized and characterized by IR and NMR spectroscopy. X-Ray crystallography reveals that the structure of these complexes comprises a binuclear arrangement with two SnPh3Cl moieties linked via the bridging P(O)-X-P(O) ligands. The influence of the ligand structures on the organization of the crystal structures and the coordination interactions are discussed. Studies of the crystal packing reveal NH...Cl, CH...Cl or CH...O hydrogen bonding interactions, as a function of the X or R groups, to be the main factor controlling the supramolecular architecture in this series of complexes. Based on the results from quantum theory of atoms in molecules (QTAIM) and natural bond orbital (NBO) analyses, Sn-ligand interactions are found to be mainly electrostatic (donor-acceptor-like with charge transfer from the phosphoryl donors to the tin atoms). The stronger coordination bonds are found in the complexes containing Ph substituents with aliphatic spacers, in agreement with the experimental evidence. Binuclear arrangements instead of polymeric or chelating systems may be attributed to the steric demands of SnPh3Cl, regardless of the ligand structures.
WATER MISCIBLE SOLVENT BASED PROCESS FOR PURIFYING A BISPHOSPHATE
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Page/Page column 17, (2010/07/09)
There is provided herein a process for purifying bisphosphate comprising solvating a molten bisphosphate in a mixture of water and water miscible solvent; cooling the solution over a period and to a temperature that provides for crystallization of solid product; increasing the pH of the solution prior to, and/or during, and/or after the initiation of crystallization, and/or after crystallization, by the addition of a base; and after crystallization is complete, separating solid product from the solution; washing the separated solid product in the same and/or different mixture of water and water miscible solvent; and, washing the solid product which has been washed in the mixture with water.