Synthesis and Structural Investigation of a Series of Noncentrosymmetric Cyclohexaphosphates: M(C6H5NH3)4P6O18⋅8H2O (M: Cd, Cu, Co)
Identifieur interne : 001608 ( Main/Exploration ); précédent : 001607; suivant : 001609Synthesis and Structural Investigation of a Series of Noncentrosymmetric Cyclohexaphosphates: M(C6H5NH3)4P6O18⋅8H2O (M: Cd, Cu, Co)
Auteurs : S. Abid [Tunisie] ; M. Rzaigui [Tunisie]Source :
- Structural Chemistry [ 1040-0400 ] ; 2005-10-01.
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Abstract
Abstract: Three new noncentrosymmetric cyclohexaphosphates with the general formula M(C6H5NH3)4 P6O18⋅8H2O (M: Cd, Cu, Co) are synthesized. They crystallize in the monoclinic system, space group P21, Z = 2 and are isostructural. We have determined their structure from the Cd salt. This Cd salt exhibits the following unit-cell parameters: a = 9.852(1), b = 24.784(4), c = 9.2078(8) Å, β = 107.92(9)∘, V = 2139.2(9) Å3. The structure has been solved using direct method and refined to a reliability R factor of 0.042. The structure can be described as infinite anionic layers with composition of [Cd(P6O18)(H2O)8]4− and parallel to the (1 0 1) plane. The charge compensation and the three-dimensional cohesion are performed by the protonated amine located between these inorganic layers.
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DOI: 10.1007/s11224-005-6059-8
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