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Citation: Liu Guang, Zhang ShiWei. Synthesis and Structure of a Novel 18Mo Polyoxomolybdate[J]. Acta Physico-Chimica Sinica, ;2002, 18(07): 624-628. doi: 10.3866/PKU.WHXB20020711 shu

Synthesis and Structure of a Novel 18Mo Polyoxomolybdate

1.
State Key Laboratory for Structural Chemistry of Unstable and Stable Species,College of Chemistry and Molecular Engineering, Peking University, Beijing　100871

Received Date: 14 December 2001
Available Online: 15 July 2002

A new compound (NH4)6•[Ca2(H2O)6(CH3COO)2]•{Ca@[O52(OH)4(CH3COO)2]}•14H2O was prepared and the structure was determined by Xray diffraction analysis. The compound shows an interesting girdlelike structure that is composed of eighteen Mo－O octahedra. There is a Ca2＋ cation in the center of the girdle, which connects to the girdle backbone by bonding to four oxygen atoms of the girdle. The valences of ten Mo atoms are ＋6 while those of the other eight Mo atoms are ＋5, between which Mo－Mo bonds are found. Four acetic ligands connect to the girdle. The girdles link into 1D chains by the Ca2＋ cations above and below the girdle bonding to the backbone oxygen atoms. This compound is triclinic, space group P1, a=1.055 2(2)nm, b=1.515 0(3)nm, c=1.544 9(3)nm, α=60.84(3), β=88.00(3), γ=71.21(3)°, V=2.019 4(7)nm3, R1=0.036 6 and wR2=0.083 3.
- Molybdenum;Polyoxomolybdate;Girdlelike structure;Chainlike structure;Crystal structure
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