Hydrothermal Synthesis and Crystal Structure of [{Cu(2,2′-bpy)2}2Mo8O26]: a β-octamolybdate Cluster Covalently Bonded to Two {Cu(2,2′-bpy)2}2+ Coordination Complexes via Bridging oxo Groups

Assembling β-Octamolybdate Clusters into New Polyoxomolybdates with Unusual Architectures

“…103.1 for I , 103.3 for II , 102.9 Å for III ). These values are in the range expected for the octahedrally coordinated Mo atoms with small differences in the extend of distortion from the O h geometry, and in agreement with those in the previously reported molybdate strctures. − …”

“…The compositional variations, the structural diversity coupled with the interesting properties of the inorganic oxides, are one of the important reasons for the continued focus in this area. , The assembly of transition metal oxides, especially the polyoxo ions, in the presence of organic amines is of contemporary interest. − The assembly of the polyoxo ions appears to be crucially dependent on the conditions under which they are crystallized, though a clear understanding of the organization of these hybrid materials is still elusive. The structure-directing properties of the organic components, however, have been exploited in the preparation of many metastable solids with novel architectures.…”

“…The structure-directing properties of the organic components, however, have been exploited in the preparation of many metastable solids with novel architectures. The formation of new polyoxomolybdates and related solids has been investigated in great detail, in recent years, resulting in new types of structures, including the oxo-molybdenum clusters linked via organic/inorganic tethers. − It occurred to us that it could be possible to replace the tethers by simple Mo−O linkages resulting in new types of polyoxomolybdates with novel structures, though no such compounds have been synthesized earlier. During the course of our investigations on the formation of novel zinc molybdates in the presence of organic amines, we have now isolated three new polyoxomolybdates, [NH 3 (CH 2 ) 3 NH 3 ] 2 [Mo 8 O 26 ]·H 2 O, I , [NH 3 (CH 2 ) 2 NH 2 (CH 2 ) 2 NH 3 ] 2 [Mo 9 O 30 ], II , and [NH 3 (CH 2 ) 2 NH 2 (CH 2 ) 3 NH 3 ] 2 [Mo 10 O 33 ], III , synthesized in the presence of 1,3-diaminopropane (DAP), diethylenetriamine (DETA), and N(2-aminoethyl)1-3-diaminopropoane (AEDAP), respectively, employing hydrothermal methods.…”

“…These values are in the range expected for the octahedrally coordinated Mo atoms with small differences in the extend of distortion from the O h geometry, and in agreement with those in the previously reported molybdate strctures. [3][4][5][6][7][8] The successful isolation of I-III provides novel examples of assembling the oxomolybdate clusters under hydrother-mal conditions. The variations in the structures arises mainly due to the differences in the connectivity between the [Mo 8 O 26 ] clusters.…”

Syntheses and Structures of Organic−Inorganic Hybrid Compounds Based on Metal−Fluconazole Coordination Polymers and the β-Mo8O26 Anion

“…FT-IR Spectroscopy. In the IR spectra of compounds 1 − 5 , bands in the range 1000−600 cm -1 are nearly identical to those of the reported [β-Mo 8 O 26 ] 4- except slight shifts of some peaks due to the effect of coordination . This indicates that the polyanions in compounds 1 − 5 retain the basic [β-Mo 8 O 26 ] 4- structure.…”