Syntheses and structures of two novel inorganic–organic hybrid octamolybdates: [H2enMe]2[Mo8O26]$2H2O and [Ni(2,20-bpy)3]2[d-Mo8O26]

Two novel inorganic–organic hybrid octamolybdate complexes [H2enMe]2[Mo8O26]$2H2O 1 (enMeZ1,2-diaminopropane) and [Ni(2,20-bpy)3]2[d-Mo8O26] 2 (2,20-bpyZ2,20-bipyridine) have been hydrothermally synthesized and characterized by the elemental analyses, TG analyses, IR spectra, XPS spectra and the single-crystal X-ray diffraction. Crystal data for 1: Monoclinic, space group P21/n, aZ7.9059(16) A ° , bZ17.415(4) A ° , cZ11.509(2) A ° , bZ109.93(3)8, VZ1489.7(5) A ° 3, ZZ2, and R1[IO2s(I)]Z0.0447. Crystal data for 2: Monoclinic, space group C2/c, aZ19.987(4) A ° , bZ14.117(3) A ° , cZ25.435(5) A ° , bZ100.59(3)8, VZ7054(2) A ° 3, ZZ4, and R1[IO2s(I)]Z 0.0280. Compound 1 contains left-handed and right-handed helical chains, which are built up from only molybdenum oxide building blocks and further interconnected to form the double helical chains. The [Ni(2,20-bpy)3]2C coordination complexes in compound 2 are packed together via the aromatic p–p stacking interactions and exhibit an interesting 3D honeycomb ‘host’ network with 1D channels, in which the octamolybdate anions ‘guests’ reside. q 2004 Elsevier B.V. All rights reserved.