Highly Conducting Phenazine-Doped 5,10-Dihydro-5,10-dimethylphenaziniumyl-TCNQ. Physical Properties and Crystal and Molecular Stucture

Article abstract of DOI:10.1107/S056774088000622X

5,10-Dihydro-5,10-dimethylphenaziniumyl 7,7,8,8-tetracyano-p-quinodimethanide (M2P-TCNQ) can be doped chemically with neutral phenazine (P).We investigated single crystals of a phase with composition P0.4(M2P)0.6TCNQ, i.e. (C12H8N2)0.4(C14H14N2)0.6(C12H4N4), C25.2H15.6N6, M_r=402.44, triclinic, P1<*>, a=3.843(3), b=7.730(6), c=16.028(11) Angstroem, α=91.93(6), β=93.56(6), γ=94.57(5) deg, V=473 Angstroem³, Z=1, d_c=1.41 Mgm^-3.The structure was solved by direct methods and refined by least squares to R=0.073 for 704 independent diffractometer data.The stucture consists of segregated regular stacks of TCNQ and of dimethylphenazine doped with 40percent phenazine.Interplanar distances are 3.26(1) Angstroem in the TCNQ and 3.44(1) Angstroem in the M2P stacks.The structure, the EPR data between 100 and 380 K and the electrical conductivity at room temperature are all very similar to those of NMP-TCNQ.