84662-82-8Relevant academic research and scientific papers
Preparation and properties of AzaTCNQ- anion salts and mixed AzaTCNQ-/ TCNQ{minus sign, dot below}/TCNQ salts of some tetrakis(isocyanide)rhodium(I) cation, and x-ray crystal structure of the AzaTCNQ--tetrakis(2,6-dimethylphenylisocyanide)rhodium(I)+ salt
Matsubayashi, Gen-Etsu,Tanaka, Hirohisa,Tanaka, Toshio,Nakatsu, Kazumi
, p. 217 - 224 (1982)
The following ATCNQ- salts and mixed ACTNQ-/ TCNQ{minus sign, dot below}/TCNQ salts (ATCNQ- = 4-dicyanomethylenepyridinium dicyanomethylide, so-called aza-tetracyanoquinodimethan anion; TCNQ = 7,7,8,8-tetracyano-p-quinodimethan) of tetrakis(isocyanide)rhodium(I) cation were prepared; [Rh(RNC)4]+ATCNQ- (R = C6H5, 2,6-Me2C6H3, and 2,4,6-Me3C6H2), [Rh(RNC)4]+(ATCNQ-)n(TCNQ){minus sign, dot below})1-n (R = 2,6-Me2C6H3, n = 0.2; R = C6H5 and 2,4,6-Me3C6H2, n = 0.3), and [Rh(RNC)4]+(ATCNQ-)a9(TCNQ{minus sign, dot below})0.1(TCNQ)0.8 (R = 2,6-Me2C6H3 and 2,4,6-Me3C6H2). Of these salts, [Rh(2,6-Me2C6H3NC)4]+(ATCNQ-/ TCNQ{minus sign, dot below} and [Rh(2,6-Me2C6H3NC)4]+(ATCNQ-)/ TCNQ{minus sign, dot below}/TCNQ) exhibit electrical resistivities of ～1 X 105 Ωcm as compacted samples at 25 °C and behave as typical semi-conductors, while the resistivities of other salts are larger than 1 X 109 Ωcm. Electronic absorption spectra and magnetic susceptibilities of the salts are discussed in terms of stackings of TCNQ{minus sign, dot below}, TCNQ, and ATCNQ- in the solid state. The crystal structure of [Rh(2,6-Me2C6H3NC)4]+ATCNQ- was determined by single-crystal X-ray diffraction. The triclinic crystal, space group P1, has cell dimensions a = 10.964(2), b = 12.768(2), c = 8.375(1) A, α = 102.03(2), β = 88.84(2), gg = 112.07(2)°, and Z = 1, where the orientation of the ATCNQ- anion moiety is disordered with respect to the pyridinium ring. Least-squares refinement, based on 4094 independent reflections with {divides}Fo{divides} > 3σ(F), yielded an R factor of 0.052.
