Crystal and molecular structure of the salt

Comparison of the bis(ferrocenylethynyl)phenylmethylium cation with bis(ferrocenylethenyl)methylium analogues

“…Brønsted or Lewis acids have been used to generate carbocations stabilised by one or more group 8 metallocenes from alcohol precursors [7,[23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Indeed, [Fc 2 CCCFc] + -related to our target cations in featuring a ferrocenylalkynyl group -was obtained from protonation of Fc 2 C(OH)C"CFc, itself obtained from the reaction of FcC"CLi and Fc 2 CO [32,37].…”

Synthesis, structures and reactions of some metallocene alcohols

“…Many have been synthesised as precursors to metallocenestablised carbocations, which can be described as (g 5 -cyclopentadienyl-g 6 -fulvene)metal(II) and whose structures and bonding have been extensively studied [1][2][3][4][5][6][7][8][9][10][11][12], and which have themselves served as synthetic intermediates [12][13][14][15][16][17]. Metallocenyl alcohols have also been used as intermediates in the synthesis of chiral ligands for asymmetric catalysis [18,19].…”

The First Triple‐Decker Complex with a Carbenium Center, [CpCo(μ‐C3B2Me5)RuC5Me4CH2]+: Synthesis, Reactivity, X‐Ray Structure, and Bonding

“…However, the C 3 B 2 and C 5 (Ru) rings are tilted by 7.3° (cf. 6.8° for 3 BPh 4 ) . The angle between the C 5 (Ru) ring centroid and the C−CH 2 (C14−C19) bond (40.1°) is greater than the corresponding angle in 3 (39.4°).…”