A detailed description of the crystal structure and a Hirshfeld surface analysis of the new heteropolyoxometalate compound (C 6 H 8 N) 5 [HAs 2 Mo 6 O 26 (H 2 O)]Á-3H 2 O are reported. The title compound was synthesized using solution methods and its structure was characterized by single-crystal X-ray diffraction. The investigated compound contains a new [HAs 2 Mo 6 O 26 (H 2 O)] 5À polyanion and crystallizes in the monoclinic space group P2 1 /c. The crystallographic analysis provided an understanding of the architecture and structural features of the complex crystal lattice and the Hirshfeld surface analysis shed more light on the intermolecular interactions occurring in the crystal.
The crystal structure, Hirshfeld surface analysis and spectroscopic analysis of a new polyoxometalate (POM) compound, namely, nonakis(2-methoxyaniline) bis(diphosphopentamolybdate) trihydrate, (C 7 H 9 NO) 9 [P 2 Mo 5 O 23 ] 2 Á3H 2 O, is reported. The title compound was synthesized using the solution method and was structurally characterized by single-crystal X-ray diffraction, which revealed P1 symmetry. A study of the intermolecular interactions using Hirshfeld surface analysis confirmed that the hydrogen-bonding interactions play the dominant role in the stability of the crystal structure. The refinement was complicated by extensive disorder affecting 11 of the 16 ions and molecules in the asymmetric unit. IR and UV-Vis spectroscopic techniques were used to identify the vibrational modes and to classify this compound as an insulator.
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