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χ‐Octamolybdate [Mo V 4 Mo VI 4 O 24 ] 4− : An Unusual Small Polyoxometalate in Partially Reduced Form from Nonaqueous Solvent Reduction
Author(s) -
Wang Longsheng,
Yin Panchao,
Zhang Jin,
Hao Jian,
Lv Chunlin,
Xiao Fengping,
Wei Yongge
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201002154
Subject(s) - polyoxometalate , crystallography , x ray photoelectron spectroscopy , valence (chemistry) , cluster (spacecraft) , chemistry , acetonitrile , molybdenum , ion , cubane , crystal structure , inorganic chemistry , catalysis , physics , nuclear magnetic resonance , organic chemistry , computer science , programming language , biochemistry , chromatography
The first mixed‐valent octamolybdate anion [Mo V 4 Mo VI 4 O 24 ] 4− , termed χ‐octamolybdate due to its shape, was obtained by partial reduction of α‐(Bu 4 N) 4 [Mo 8 O 26 ] in dry acetonitrile. Single‐crystal X‐ray structure analysis revealed that the anion includes an unusual Mo V 4 O 8 cubane‐like cluster core, whose four side faces are capped by four MoO 4 units to form a crosslike cluster. X‐ray photoelectron spectroscopy (XPS) and bond valence sum (BVS) calculations were carried out to validate the presence of mixed‐valent Mo centers.