Die kristallstruktur von TlC5Me5

A Phosphorus Lewis Super Acid: η5-Pentamethylcyclopentadienyl Phosphorus Dication

“…[10][11][12] Among the known examples, group 13 decamethylmetallocenium cations [(Cp*) 2 E] + (E = B, 13,14 Al, 15 Ga 16 ) have been reported, in which only [(h 5 -Cp*) 2 Al] + adopts an h 5 /h 5 binding mode analogous to ferrocene. 17 In contrast to the discrete cations, the low valent neutral compounds [(h 5 -Cp*)E] n (E = Al 18 , Ga 19 , In 20 , Tl 21 ) (Figure 1A) form cluster structures in the solid state. In addition, a terminal borylene complex containing an h 5 -Cp* ligand, namely [(h 5 -Cp*)BFe(CO) 4 ], 22 was described by Cowley. In addition, examples of dicationic [(h 5 -Cp*)B(L)] 2+ species have been reported.…”

MCn (M = Ga, In, Tl) Coordination Polyhedra in Crystal Structures

“…The distances between the metal atoms in the pseudocluster the VDP of which share faces are 4.073-4.173 and 3.943-3.963 Å in the case of gallium and indium, respectively (Table 1). Note that the Cambridge Structural Database System [6] contains a similar thallium derivative, TlCp* {FEXDUH} [33]; however, because of the statistical disorder of pentamethylcyclopentadienide anions, it was not introduced to the studied set of selected structures.…”

A geminal dithallated bis(iminodiphenylphosphorano)methine carbon bridged dimer bound by Tl–Tl interactions

“…11 The early structurally characterized carbon-bound Tl (I) organometallics were limited to cyclopentadienyl ligand systems. [12][13][14] Recently, examples with carbon bound Tl (I) The dilithiated bis(iminodiphenylphosphorano)methandiide [Li 2 L] (1) salt or the parent methylene ligand has provided a variety of pincer, chelate and bimetallic spirocyclic bridging carbenes of many metals. 18 While extending this chemistry to the low oxidation closed-shell, heavy, main group element thallium(I), we discovered an unusual dithallated carbon bridged Tl (I) complex containing a six-membered Tl 4 C 2 core ring bound by Tl-Tl interactions which is reported herein.…”