Synthesis and electrical resistivity of tetrakis(isocyanide)rhodium(I) cation-TCNQ radical anion salts
1981; Elsevier BV; Volume: 49; Linguagem: Inglês
10.1016/s0020-1693(00)90461-4
ISSN1873-3255
AutoresTakehiko Inuma, Toshio Tanaka,
Tópico(s)Porphyrin and Phthalocyanine Chemistry
ResumoThe following 12 simple and complex salts of the TXNQ⨪ radical anion with tetrakis(alkyl- or arylisocyanide)rhodium(I) cations were prepared; [Rh(RNC)4]+TCNQ⨪ (R =t-Bu, c-C6H11, 4-MeC6H4, 4-MeOC6H4, 2,6,Me2C6H3 and 2,4,6-Me3C6H2), [Rh(RNC)4]+(TCNQ⨪2 (R = c-c6H11, Ph, 4-MeC6H4, 2,6-Me2C6H3, and 2,4,6-Me3C6H2) and [Rh(4-MeC6H4NC)4+(TCNQ⨪3. In addition, a novel TCNQ⨪ salt formulated as [Rh(PhNC)4]+(TCNQ⨪)23)(cLo−4)1/3 also was obtained. Electrical resistivities of the simple salts vary widely over the 3.0 × 105 - larger than 1010 Ω cm range as compacted samples at 25 °C. The variation of resistivities over a wide range was found also in the 1:2 complex salts, of which [Rh(PhNC)4]+ (TCNQ⨪2 and [Rh(4-MeC6H4NX)4+ (TCNQ⨪2 exhibit relatively small resistivities, 9.3 and 38 Ω cm, respectively. as compacted samples at 25 °c. Electronic absorption spectra and magnetic susceptibilities of the salts are discussed in terms of the stacking of the TCNQ⨪ radical anion (and also neutral TCNQ for the complex salts) in the crystalline state
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