Hydrothermal synthesis and structure of $(C_4N_2H_1_2)_3P_2Mo_5O_2_3 cdot H_2_O$ and $(C_3N_2H_1_2)_3P_2Mo_5O_2_3 cdot 4H_2O$

摘要

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 cornerconnection. The phosphate groups cap the pentamolybdate ring anion on either side. The anion is stabilizedby strong hydrogen bonds involving the hydrogen atoms of the amine molecules and the oxygen atoms ofthe polyoxoanion and water molecules. Crystal data: I, monoclinic, space group = $P2_1/n$ (no. 14), mol.wt. = $1192 cdot 1, a = 9 cdot 4180(1), b = 18 cdot 1972(3), c = 19 cdot 4509(1) cdot A, eta = 103 cdot 722(1) deg, V = 3238.37(7)A^3$ Z = 4: II,triclinic, space group = P1(no. 2), mol. wt. = $1210 cdot 1, a 9 cdot 5617(9), b = 13 cdot 3393(12), c = 13 cdot 7637(12) A lpha = 88 cdot 735(1), b = 75 cdot 68(1), g = 87 cdot 484(2)_ deg V = 1699cdot 2(3) A3.$