Effect of the crystallization conditions and trapped solvent on the physical properties of TCNQ salts

Some physical properties of TCNQ salts are studied with regard to the crystallization conditions and the amount of trapped solvent. These factors can be of prime importance and suggest to be very cautious concerning the characterization of a given compound. On examine l'influence des conditions de cristallisation et de la teneur en solvant piege sur les proprietes physiques des sels de TCNQ. Ce travail montre que cette influence est souvent primordiale et suggere d'ětre tres prudent quant a la definition des produits etudies.