Hydrothermal syntheses and crystal structures of two new phosphomolybdates based on an organoamine template

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)?ų, 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)?ų, 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.