Premium
Mo V 2 O 4 2+ Directs the Formation and Subsequent Linking of Potential Building Blocks under Different Boundary Conditions: A Related Set of Novel Cyclic Polyoxomolybdates
Author(s) -
Müller Achim,
Kuhlmann Christoph,
Bögge Hartmut,
Schmidtmann Marc,
Baumann Mario,
Krickemeyer Erich
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200109)2001:9<2271::aid-ejic2271>3.0.co;2-8
Subject(s) - chemistry , molybdate , aqueous solution , crystallography , valence (chemistry) , cluster (spacecraft) , molybdenum , stereochemistry , inorganic chemistry , organic chemistry , computer science , programming language
The synthesis and structural characterization of a novel series of deep‐red mixed‐valence (Mo VI /Mo V ) compounds with nano‐sized spherically shaped cluster anions containing 18, 40, or 54 Mo atoms, respectively, is reported: Na 10 [H 4 Mo 18 O 56 (CH 3 COO) 2 ] × ca. 36 H 2 O × 3 CH 3 COOH ( 1 ), (NH 4 ) 12 Na 12 [Mo 40 O 128 ] × ca. 70 H 2 O ( 2 ), (NH 4 ) 12 Na 20 [H 4 Mo 54 O 168 (CH 3 COO) 4 ] × ca. 64 H 2 O ( 3 ), Na 32 [H 4 Mo 54 O 168 (CH 3 COO) 4 ] × ca. 128 H 2 O ( 4 ), and Na 32 [H 4 Mo 54 O 168 (CH 3 COO) 4 ] × ca. 98 H 2 O ( 5 ). Clusters 3 , 4 , and 5 differ in the packing of the rings in the lattice. The anions are easily formed by reduction of an acidified aqueous molybdate solution while the deliberately generated Mo V 2 O 4 2+ group − abundant in all clusters − has a directing influence on the formation of the preliminary building blocks. Furthermore, it is possible to control the ratio of the {Mo V 2 } units to the Mo VI centres by adjusting the specific concentration of the employed reducing agent.