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Deprotonation of dibenzo-N-tert-butylaminofulvene leads to the (1-azapentadienyl)lithium derivative eta-5-azapentadienyllithium being readily available. The derivative is also obtainable from the mechanistically more complex reaction sequence sparked off by treatment of the aminomethylfluorene derivative 9-(N-tert-butylaminomethyl)-fluorene with suitable bases. There seem to be energetic limits to the Li-1-azapentadienyl bonding interaction of eta-5-azapentadienyllithium.

The rigid C1-bridged dilithiobis(cyclopentadienide) exhibits a cyclotetrameric (Li2(Cp-R-Cp))4 supramolecular structure. The Li2 is eta(super 5)-coordinated to the exposed face of the tetrahydroindenyl substrate. The projection of the unit cells reveal that 4*tmeda tetramers form a columnar conformation in the crystal. The arrangement in the compound depends upon the nature of the ligand system. The study uses X-ray diffraction and quantum chemical calculations.

The syntheses and characterization of organic semiconductors based on perylene bisimide (PBI) dyes that are equipped with up to four halogen substituents in the bay area of the perylene core and five different highly fluorinated imide substituents are described. Top-contact/bottom-gate organic thin film transistor (OTFT) devices are constructed by vacuum deposition of the PBIs on Si[O.sub.2] gate dielectrics.

Examines the structure and chemical behavior of the eta5-(1-azapentadienyl)lithium derivative. Identification of eta5-(1-azapentadienyl)lithium derivative as a global minimum; Analysis of the bonding features of the dilithiated system; Mechanism of the generation of the derivative by deprotonation reactions.