Crystal Structures of Three New Hexavanadate Hybrids with Aromatic Carboxylate Ligands

Abstract

Three novel hexavanadate hybrids: (Bu4N)2[V6O13{(OCH2)3CCH2OOCC6H4Br-p}2] (compound 1), (Bu4N)2[V6O13{(OCH2)3CCH2OOCC6H4NO2-m}2] (compound 2) and (Bu4N)2[V6O13{(OCH2)3CCH2OOCC4H3S}2] (compound 3) have been synthesized and structurally characterized by means of single-crystal X-ray diffraction. All three compounds crystallize in the monoclinic space group in P2 1/c with the respective cell parameters: a = 11.806 (2) A, b = 16.926 (3) A, c = 17.836 (4) A, β = 98.42 (3) A for compound 1, a = 11.471 (2) A, b = 16.796 (3) A, c = 18.136 (4) A, β = 98.22 (3) A for compound 2 and a = 11.3299 (2) A, b = 15.8742 (3) A, c = 18.6637(3) A, β = 97.7462 (14) A for compound 3. The influences of these organic conjugated systems to the structures of hexavanadate hybrids have also been discussed. Three new hexavanadate hybrids with aromatic carboxylate ligands were synthesized by means of post-functionalization strategy. In the structures of these compounds, the organic ligands are rigid and the atoms are almost coplanar on account of the conjugated effect of the aromatic rings, forming wings of a spacecraft-like structure.