New C-functionalized silacycloalkanes (CH2)nSi(CH2X)2 and (CH2)nSi(CH2X)CH2X′ (n = 3, 4; X, X′ = functional group): Synthesis and reactivity studies of analogous silacyclobutanes and silacyclopentanes

Models for the Active Site in [FeFe] Hydrogenase with Iron-Bound Ligands Derived from Bis-, Tris-, and Tetrakis(mercaptomethyl)silanes

“…The main focus of this work was the synthesis of iron complexes containing silicon-based thiolato ligands derived from (mercaptomethyl)silanes of the formula type R n Si(CH 2 SH) 4− n ( n = 0−2; R = organyl) and the determination of the electrochemical properties of these complexes (in comparison to the corresponding carbon analogues) to investigate the influence of silicon on electrocatalysis and the formation of dihydrogen. These studies were also performed as part of our systematic investigations on functionalized tetraorganylsilanes of the formula type R n Si(CH 2 X) 4− n ( n = 0−3; R = organyl; X = functional group). , …”

Hexacoordinate Silacyclobutane Dichelate Complexes: Structure, Properties, and Ligand Crossover

“…The chemistry of silacyclobutane has attracted considerable attention because of its unique reactivity and potential as a reactant in polymer formation . Neutral hexacoordinate silicon dichelates based on hydrazide ligands have previously been reported to readily undergo complete exchange of ligands with their differently substituted precursors (eq ), between two differently substituted complexes (eq ) and with germanium analogues .…”

Synthesis and Characterization of {[Tris(trimethylsilyl)silyl]methyl}silanes of the Formula Type Me4−nSi[CH2Si(SiMe3)3]n (n = 1−3) and Derivatives

“…For example, (i) (nitratomethyl)silanes [R 4− n Si(CH 2 ONO 2 ) n ] have been demonstrated to be highly potent explosives, (ii) (mercaptomethyl)silanes [R 4− n Si(CH 2 SH) n ] have been used as multidentate ligands in iron complexes, and (iii) tris(mercaptomethyl)silanes [RSi(CH 2 SH) 3 ] have been applied as tripodal adsorbate molecules for the fabrication of self-assembled monolayers on Au(111) . The corresponding multifunctional (chloromethyl)silanes [R 4− n Si(CH 2 Cl) n ] are the most versatile starting materials in this chemistry and can be prepared by treatment of the respective chlorosilanes [R 4− n SiCl n ] with (chloromethyl)lithium, generated in situ from bromochloromethane and n -butyllithium in tetrahydrofuran. − In continuation of our systematic studies on multifunctional tetraorganylsilanes of the type R 4− n Si(CH 2 X) n − ,, and inspired by studies of Marschner et al, we have been interested in the reactivity of (chloromethyl)silanes of the type R 4− n Si(CH 2 Cl) n against silyl anions and have attempted to synthesize {[tris(trimethylsilyl)silyl]methyl}silanes of the type Me 4− n Si[CH 2 Si(SiMe 3 ) 3 ] n ( n = 1−4), compounds 5 − 8 , starting from the corresponding (chloromethyl)silanes 1 − 4 . Owing to their reactive Si−Si bonds, the target compounds 5 − 8 are expected to be versatile starting materials for the synthesis of a variety of further multifunctional tetraorganylsilanes.…”