Organometallic compounds containing tris(trimethylsilyl)methyl or related ligands †

Formation of Unexpected Selenium‐Rich Compounds by Selenation of the Very Bulky (PhMe2Si)3CLi:s‐Tetraselenane, a Novel Polyseleno Heterocycle

“…[1] Chalcogen compounds containing the tris(trimethylsilyl)methyl group, (Me 3 Si) 3 C, have been prepared (sulfur, [2] selenium, [3][4][5] and tellurium [3,6] ). The introduction of such sterically demanding substituents at the heavier chalcogen elements has been a part of our research for the recent time, because they have been useful to stabilize or detect rather reactive species or intermediates in tellurium(II), [7] and selenium(II) azide chemistry.…”

Structures of Tetrasilylmethane Derivatives (XMe2Si)2C(SiMe3)2 (X = H, Cl, Br) in the Gas Phase, and their Dynamic Structures in Solution

“…were treated as two pairs [the groups based on Si (2) and Si(3) were defined relative to one another and, similarly the groups based on Si(4) and Si(5) were paired], allowing dihedral angles to be uniquely defined as X (14) Geometry optimisations and frequency calculations were carried out to determine the free energies of all conformers. All calculations utilised the GAUSSIAN 09 [37] suite of programs and were performed on the University of Edinburgh ECDF cluster [38] or the UK National Service for Computational Chemistry Software clusters [39].…”

“…The GED data used for the refinements of each of C(SiXMe 2 ) 4 (X = H, F, Cl, Br) (1)(2)(3)(4) were collected using the apparatus formerly housed in Edinburgh [53], from samples that were synthesised and characterised at Imperial College London. Scattering intensities were recorded on Kodak Electron Image film at two nozzle-to-film distances, maximising the scattering angles over which data were collected.…”

“…The chemistry of tetrasilylmethane derivatives has been studied extensively, with the severe steric constraints imposed by four Si-centred substituents attached to a carbon atom often leading to unusual reactivities and novel structural features [1][2][3][4]. The most widely studied tetrasilylmethane derivatives have the general structures (Me 3 Si) 3 CSiRR X, (PhMe 2 Si) 3 CSiRR X, and (Me 3 Si) 2 C(SiXMe 2 )(SiR 2 Y) (where R and R = Me, Et, Ph etc.…”

Manganese(II) and iron(II) derivatives of tris{(diphenylphosphino)dimethylsilyl}methane: Synthesis and properties

“…In recent years, we have witnessed an increasing interest in the chemistry of bulky silyl-substituted ligands containing donor groups [1][2][3]. Numerous derivatives are made of s, p, and f block elements, but a few compounds of transition metals are known as yet.…”