Translation of "Electron deficient" in German

Benzene derivatives or five-membered aromatic systems may become electron-deficient as a result of fluorination or nitration.

The group Ar represents an electron-deficient heteroaromatic group.

Suitable electron-transport units are, in particular, electron-deficient aromatics or heterocycles.

The invention relates to a novel electron transport material based on fused aromatic electron-deficient compounds.

One aspect of the invention relates to a novel electron transport material based on fused aromatic electron-deficient compounds.

Preference is further given to bismuth complexes having electron-deficient carboxylate ligands, preferably fluorinated carboxylate ligands.

Electron-rich atoms or molecules react with electron-deficient atoms or molecules.

Electron-deficient ions are positively charged, ions with excess of electrons are negative.

Ando has suggested that the use of electron-deficient phosphonates accelerates the elimination of the oxaphosphetane intermediates.

Alternating copolymers of alkenyl isocyanates and electron deficient olefins have not previously been described in the literature.

Retarding (delaying) additives include, for example, organometallic compounds, electron-deficient compounds, certain acids or salts.

These alkenyl isocyanates are known per se or can be prepared by rearrangement reactions of suitable electron-deficient nitrogen compounds.

Six-membered aromatic rings which are electron-deficient may have a stabilizing effect on the metal complex.

Special preference is given to compounds which coordinate to the central metal atom by exactly one electron-deficient double bond.

The preparation of these osmium tetroxide-C60 adducts is carried out analogously to the synthesis of adducts of electron-deficient olefins known in the literature.

Suitable acceptor substituents are especially cyano groups and electron-deficient heteroaryl groups which may also have further substitution.

As a pioneer in the field of computational chemistry, Schleyer identified a number of new molecular structures, especially related to lithium chemistry and electron deficient systems.

In organic solution the electron deficient diazapyrenium salt (rod) and the electron rich 2,3-dioxynaphthalene units of the crown ether (ring) self-assemble by formation of a charge transfer complex.

This invention further relates to a process for preparing such alternating copolymers by copolymerization of appropriate alkenyl isocyanates and electron deficient olefins.

Compared with the organometallic compounds hitherto used and known, these heterocyclic organometallic compounds have the decisive advantage that an additional intramolecular stabilization takes place by electron transfer from the donor atoms to the electron-deficient acceptor atom.

The present invention relates to alternating copolymers of alkenyl isocyanates and electron deficient olefins, a process for their preparation, and a method of their use.

Since carbocyclic aryl and aralkyl groups are often easier to sulfonate than electron-deficient, nitrogen-containing heterocycles, such as pyridine or bipyridine, in the case of such a substitution of the heterocycle, or in the case of fusion of aromatic, nonheterocyclic ring systems with the nitrogen-containing heterocycle, sulfonation can be carried out under substantially milder conditions without these nitrogen-containing complexing agents substituted in this manner being adversely affected by such a substitution in their property as complexing agents for the novel process.

Further, the general method of initiator-free photopolymerization of electron-rich and electron-deficient compounds via charge-transfer complexes is known from EP 618237 (Fusion Systems Corp.).