Anthracene-tetracyanoethylene complex

More recently, statistical or direct methods have achieved a spectacular success. The basis of the method is that the lost information on the phase angle can be derived from the X-ray intensities. Two large structures thus solved by statistical methods are the dichloromethane-anthracene-tetracyanoethylene complex,4 namely, (8 C2oH10N4,2CH2C12-C6N4), and 8,14-anhydrodigitoxigenin.5... 

A paper by Suppan draws attention to electrostatic interaction effects on condensed phase photoinduced electron transfer and the need to take account of the fact that solvent is not in reality a uniform dielectric material. Pressure effects on exciplex formation has been exemplified in the pyrene-p-cyanobenzene system. Ternary electron donor acceptor complexes are formed and in the case of anthracene-tetracyanoethylene gives rise to (DO ) dimer radical cations. Laser flash photolysis shows that perylene in acetonitrile undergoes three distinct electron transfer processes, (i) gives pt + MeCNT, (ii) gives... 

Electron transfer studies have also been made on alkane nitrile solutions and also on wavelength dependent effects on behaviour with dual-function fluorescein-anthracene methyl ester. 7 The polarity of the microenvironment is found to play a dominant role in solvent affected relaxation of 2-methoxy-6-chloro-9-aminoacridine. Other excited CT complexes reported upon include anthracene-tetracyanoethylene, some polyenes and... 

It is apparent that specific factors interfere for instance, anthracene is able to give charge-transfer complexes with some dienophiles, notably maleic anhydride and tetracyanoethylene . 

For example, naphthalene, anthracene, pyrene, perylene and other polynuclear aromatic hydrocarbons react in this way with donor molecules, such as dimethylaniline and other tertiary amines, methoxybenzenes, or tetracyanoethylene, in non-polar or low-polar solvents such as hexane or toluene. Such a complex is called an exciplex (from excited complex). The evidence is analogous to that summarised above for the formation of ex-... 

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