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Hydrothermal syntheses and crystal structures of two new phosphomolybdates based on an organoamine template
Abstract:Two new compounds of disphosphopentamolybdate (VI), (C6H18N2)2H2P2Mo5O23]?·?2(H2O) (1) and (C6H18N2)4.5H3P2Mo5O23]2?·?6(H2O) (2), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction. Compound 1 crystallizes in the triclinic space group P 1 with a?=?11.0863(9)?Å, b?=?11.9562(9)?Å, c?=?14.2291(19)?Å, α?=?103.0410(10)°, β?=?100.3530(10)°, γ?=?103.7390(10)°, V?=?1729.8(2)?Å3, Z?=?2; compound 2 crystallizes in the triclinic space group P 1 with a?=?14.6440(13)?Å, b?=?15.9168(13)?Å, c?=?17.9795(13)?Å, α?=?80.4270(10)°, β?=?86.1180(10)°, γ?=?64.1890(10)°, V?=?3720.1(5)?Å3, Z?=?2. Characterizations by elemental analysis, infrared analysis, and thermal analysis are also given. Formation of 1 and 2 indicates that pH of solution plays an important role during the synthesis.
Keywords:Polyoxomolybdate-phosphorus  Hydrothermal synthesis  Crystal structure
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