New ionic complexes of fullerene C-60: vertical bar Cr-I(C6H6)(2)(center dot+)vertical bar center dot (C-60(center dot-)) center dot C6H4Cl2(1); vertical bar(MDAB-CO+) center dot (CoTMPP)-T-II center dot vertical bar(2) center dot (C-60(-))(2) center dot (C6H4Cl2)(2.5) center dot (C6H4CN)(1.5) (2); and (DMETEP+)(2). (C-60(-))(2) center dot vertical bar((MnTPP)-T-II)(2) center dot DMP vertical bar. (C6H4Cl2)(5)(3) were obtained and studied by temperature EPR, SQUID and optical spectroscopy. Fullerene radical anions were shown to form (C-60(-))(2) dieters in these complexes. The (C-60(-))(2) dinner in 1 reversibly forms in the 160-240 K range and is bonded by one single bond (sigma-dimer). According to magnetic data this dimer is diamagnetic. Complex 2 contains a new type of (C-60(-))(2) dimer bonded by two single bonds (pi-dimer). Magnetic measurements show that this dinner has about two spins per dieter and, consequently, has biradical state at 300 K The energy gap between triplet and singlet states for this dinner was estimated to be 70 +/- 2 CM-1. Complex 3 contains dieters of both types. The a-dieter has 86% occupancy and the occupancy for the pi-dimer is only 14%. It was shown that sigma-dimer in 3 has the highest stability among studied ionic complexes of fullerenes and dissociates only in the 320-360 K range. Tine reasons for the difference in the electronic slates of sigma- and pi-dimers of (C-60(-))(2) are discussed.