Trimer of 6,6-dimethyl-6-stannafulvene

Syntheses of Dinuclear Metal Complexes of Rhodium, Iridium, Iron, Molybdenum, and Cobalt with Novel Bridged 2,2‘-Bis(indenyl) Systems

“…The ∆E value must be compared with those of similar systems such as [(fulvalene)Fe 2 (Cp) 2 ] (330 mV, acetonitrile), 25 [(as-indacene)Fe 2 Cp 2 ] (410 mV, CH 2 -Cl 2 ) 26 or the double-bridged species [(CpSiMe 2 ) 2 (FeCp*) 2 ] (272 mV, CH 2 Cl 2 ). 27 Even when ∆E is influenced by different electrolytes or solvents, 28 it is unambiguous that the value is smaller, as expected for this kind of strongly linked system. One reason for the minor ∆E might be the decreasing overlap due to the torsional effect by the indenyl planes.…”

“…The redox potential corresponds well with the value for (Ind)FeCp ( E 1/2 = −130 mV) recorded under same conditions. The Δ E value must be compared with those of similar systems such as [(fulvalene)Fe 2 (Cp) 2 ] (330 mV, acetonitrile), [( as -indacene)Fe 2 Cp 2 ] (410 mV, CH 2 Cl 2 ) or the double-bridged species [(CpSiMe 2 ) 2 (FeCp*) 2 ] (272 mV, CH 2 Cl 2 ) . Even when Δ E is influenced by different electrolytes or solvents, it is unambiguous that the value is smaller, as expected for this kind of strongly linked system.…”

Metal−Metal Interactions in Linked Metallocenes

“…261,262 Despite having a longer ironiron distance than that in the [1.1]ferrocenophane in Figure 15c, the separation between the two ferrocene oxidations was found to be very similar. 263 The molecule (C 5 H 4 ) 2 (SiMe 2 ) 2 , [264][265][266][267] hereafter referred to as LH 2 , in which two cyclopentadiene rings are linked by two SiMe 2 bridges from adjacent positions on the rings, has been used in the synthesis of a number of organometallics including metallocenes, two examples of which are shown in Figure 15e,f. A number of bimetallic complexes of L (which is shown in Figure 16a) have been synthesized by Siemeling, Jutzi, and co-workers from Li 2 L or H 2 L. 268 Me 3 SnLSnMe 3 (η 1 -coordination) and Cp*FeLFeCp* were both formed exclusively as the trans isomer in which the metal fragments are coordinated to opposite faces of the ligand (the iron species is shown in Figure 15e).…”

“…The molecule (C 5 H 4 ) 2 (SiMe 2 ) 2 , − hereafter referred to as LH 2 , in which two cyclopentadiene rings are linked by two SiMe 2 bridges from adjacent positions on the rings, has been used in the synthesis of a number of organometallics including metallocenes, two examples of which are shown in Figure e,f. A number of bimetallic complexes of L (which is shown in Figure a) have been synthesized by Siemeling, Jutzi, and co-workers from Li 2 L or H 2 L …”