# Hydrothermal synthesis and structure of $[(C_4N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot H_2_O$ and $[(C_3N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot 4H_2O$

Ganesan, SV and Natarajan, Srinivasan (2005) Hydrothermal synthesis and structure of $[(C_4N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot H_2_O$ and $[(C_3N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot 4H_2O$. In: Journal of Chemical Sciences, 117 (3). pp. 219-226.

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Hydrothermal_synthesis.pdf

Two new compounds, $[(C_4N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot H_2_O$ and $[(C_3N_2H_1_2)_3][P_2Mo_5O_2_3] \cdot 4H_2O$, II, have been prepared employing hydrothermal methods in the presence of aliphatic organic amine molecules. Both the compounds possess the same polyoxoanion, pentamolybdatobisphosphate, $(P_2Mo_5O_2_3)^6^-$. The anions consist of a dring of five MoO6 distorted octahedra with four edge connections and one corner connection. The phosphate groups cap the pentamolybdate ring anion on either side. The anion is stabilized by strong hydrogen bonds involving the hydrogen atoms of the amine molecules and the oxygen atoms of the polyoxoanion and water molecules. Crystal data: I, monoclinic, space group = $P2_1/n$ (no. 14), mol. wt. = $1192 \cdot 1, a = 9 \cdot 4180(1), b = 18 \cdot 1972(3), c = 19 \cdot 4509(1) \cdot A, \beta = 103 \cdot 722(1) deg, V = 3238.37(7)A^3$ Z = 4: II, triclinic, space group = P1(no. 2), mol. wt. = $1210 \cdot 1, a 9 \cdot 5617(9), b = 13 \cdot 3393(12), c = 13 \cdot 7637(12) A \alpha = 88 \cdot 735(1), b = 75 \cdot 68(1), g = 87 \cdot 484(2)_ deg V = 1699\cdot 2(3) A3.$