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Synthesis and crystal structure of dimeric, Na–O–Na bridged anhydride Na12H4[A-β-PW9O34Na(H2O)]2·38H2O

Authors :
Xikui Fang
Jing-Fu Liu
Xiaohong Wang
Ya-Guang Chen
Jianghua He
Source :
Journal of Molecular Structure. 641:159-164
Publication Year :
2002
Publisher :
Elsevier BV, 2002.

Abstract

The colorless crystals of the novel dimeric polyoxometalate Na 12 H 4 [A-β-PW 9 O 34 Na(H 2 O)] 2 ·38H 2 O were obtained by recrystallization of the precursor Na 9 [A-PW 9 O 34 ]·19H 2 O in acidic solution. The crystal is triclinic, space group P 1 , with lattice constants a=12.6134(4) A , b=13.146(6) A , c=18.243(4) A , α =88.373(3)°, β =69.92(2)°, γ =63.23(3)°, V=2507.4(14) A 3 and Z =1. The crystal structure confirms the dimeric anhydride is formed by Na–O–Na bridges linking two A-β-PW 9 O 34 Keggin units. One of the Na + ions is linked with the inner oxygen atom [O a (1)] forming a dimeric anion, while the coordination of polyoxoanions with Na + ions and water molecules results in a two-dimension network structure.

Details

ISSN :
00222860
Volume :
641
Database :
OpenAIRE
Journal :
Journal of Molecular Structure
Accession number :
edsair.doi...........4b02c9638e69345d6a3008f1be0f849a
Full Text :
https://doi.org/10.1016/s0022-2860(02)00176-x