Highly conjugated azo-aromatic systems have been prepared in high to moderate yields by linking mono- and bis-azo aromatic fragments to 4-(Rn-azulen-1-yl)-2,6-dimethyl-pyridine. The synthesized pi-extended systems have been studied by NMR spectroscopy, UVeVis and electrochemistry. Systematic increase of the conjugation along the azobenzene skeleton has affected the spectral properties of the azophenyl substituted 4-(azulen-1-yl)-pyridine. The synthesized

The azulen-1-yl group strongly influences the course of the TiCl4–Zn promoted McMurry coupling of 1-acetylazulene which afforded, along with the normal coupling products, pinacol 2dl and alkene 3, the pinacolone 4. The latter was likely formed via rearrangement of the pinacolate intermediate. An improved, microwave-assisted protocol was developed for this reaction that provided high yields of products in a short reaction time. The steric reaction

The fragmentation in the electrospray ionization mass spectrometry of several azulen-1-yl diazenes and bis diazenes was analyzed and some general features of fragmentation were evidenced.

Trends and perspectives of the IR/VCD chiroptical technique in configurational and conformational assignment of chiral compounds are illustrated with significant examples from literature reports within 2003-2008 period. The advantages, as well as inherent limitations of VCD as complementary or competing technique to the classical chiroptical methods are underlined.

Starting from 4-(azulen-1-yl)-pyranylium perchlorates, several azulenylsubstituted phenols as well as nitrobenzene and acetophenone derivatives were synthesized. The products were characterized, and the correlations between the compound structures and NMR spectra were investigated.

The synthesis of a new biazulenyl system, which contains azulene moieties coupled in 1- and 6-position is reported. The structure of the isolated compounds, as well as the calculated dihedral angle between the planes of the coupled moieties, has been correlated with the recorded spectra.

The synthesis and spectroscopic characterization of a series of three oxidovanadium(V) complexes with 8-hydroxyquinoline and Schiff-base ligands derived from salicylaldehyde and ω-hydroxy-functionalized carbohydrazides with different chain lengths are reported. The complex with the hydrazone ligand containing the shortest chain length was crystallographically characterized. This complex crystallizes in the triclinic space group Pequation image with

The title compound, [V(C9H6NO)2(CH3O)O], crystallizes with two independent molecules in the asymmetric unit. The V(V) ion is in a distorted octahedral coordination environment, with the N donors of the two chelating quinolin-8-olate ligands arranged trans to the oxo and methoxy groups.

The hydrazone ligands derived from salicylaldehyde and aliphatic carbonic acid hydrazides react with equimolecular amounts of ammonium metavanadate and 8-hydroxyquinoline in refluxing methanol to yield oxovanadium(V) complexes. The synthesis can alternatively be performed starting from [VO(acac)2] followed by aerial oxidation to form the corresponding oxovanadium(V) complexes. The molecular structures determined by X-ray crystallography feature in