Thermodynamics of bis-(η6-diphenyl)chromium (I) fulleride [(η6-Ph2)2Cr]+[C60]− in the range from T→(0 to 360)K

Thermodynamic properties of bis-(η6-cumene)chromium fulleride [(η6-PhCH(CH3)2)2Cr]+[C60]− over the range from Т→(0 to 310)K

“…For the sample tested in the present work, [(g 6 -PhCH (CH 3 ) 2 ) 2 Cr] Å+ [C 60 ] ÅÀ , the indicated endothermic transformation has the same nature as for fullerides [Cr(C 7 H 8 )] 2 C 60 [6,8], [(g 6 -Ph 2 ) 2 Cr] Å+ [C 60 ] ÅÀ [13], [(g 6 -(t-BuPh)) 2 Cr] Å+ [C 60 ] ÅÀ [14], and [(g 6 -(EtOPh)) 2 Cr] Å+ [C 60 ] ÅÀ [15]. According to electron paramagnetic resonance data, the EPR spectrum of the solid sample [(g 6 -PhCH(CH 3 ) 2 ) 2 Cr] Å+ [C 60 ] ÅÀ at 290 K is given by the symmetrical singlet and has a g-factor equal to 1.9911, which is intermediate between those characteristic of [(g 6 and C ÅÀ 60 (1.9996 to 2.0000) [20] because of strong exchange coupling between [(g 6 -PhCH(CH 3 ) 2 ) 2 Cr] Å+ and C ÅÀ 60 .…”

“…As opposed to the authors of references [6,8], we [13][14][15] suggested to consider this transformation as superposition of the physical transition -the ordering of the structure on coolingand the process of chemical nature, i.e. the association of anionradicals of fullerene by means of the formation of a single link between them.…”

“…The calorimetric study of the reversible dimerization process of fullerene molecules in crystalline complexes was carried out for [(g 6 -C 7 H 8 ) 2 Cr] Å+ [C 60 ] ÅÀ [6,8], [(g 6 -Ph 2 ) 2 Cr] Å+ [C 60 ] ÅÀ [13], [(g 6 -(t-BuPh)) 2 Cr] Å+ [C 60 ] ÅÀ [14], and [(g 6 -(EtOPh)) 2 Cr] Å+ [C 60 ] ÅÀ [15]. However, the thermodynamic characteristics of the process as well as data about the thermodynamic functions for representatives of bis-(g 6 -arene)chromium fullerides are given only by us [13][14][15].…”

“…However, the thermodynamic characteristics of the process as well as data about the thermodynamic functions for representatives of bis-(g 6 -arene)chromium fullerides are given only by us [13][14][15].…”

Harnessing the Synergistic and Complementary Properties of Fullerene and Transition-Metal Compounds for Nanomaterial Applications

“…[282] Examples of transition metal doped fullerides are less abundant, and are summarised in Table 7. Among the transition metals fulleride compounds most common are smaller first row transition metals derivatives, with various examples of Cr compounds [285][286][287][288][289][290][291][292][293][294][295] as well as Ti, [283] V, [284] Mn, [296] Ni, [296,297] Fe [296,297] and Cu. [297] A few examples of larger second row transition metals such as Mo, [295,298] Pd, [299] Ag [297] and Cd [296], Pt [299][300][301] and Au [302] of the third row have also been reported.…”