R.H. Whiteley

Bio: R.H. Whiteley is an academic researcher from University of Exeter. The author has contributed to research in topics: Cyclopentadienyl complex & Orthorhombic crystal system. The author has an hindex of 4, co-authored 7 publications receiving 295 citations.

The Crystal Structure of (1, 1′-ferrocenediyl)diphenylsilane

Abstract: The crystal structure of (1,1′-ferrocenediyl)diphenylsilane has been determined from analysis of photographic X-ray data. The crystal system is orthorhombic, a = 14.18(2), b = 12.54(2), c = 9.28(1) A, space group Pnma with four formula units. The molecule has crystallographic m (Cs) symmetry with atoms Fe and Si lying in the mirror plane, which bisects the two phenyl groups. The planar cyclopentadienyl rings are bridged by a single silicon atom, and are tilted 19.2° with respect to one another. The Fe—C(Cp) distances vary from 2.01(1) to 2.11(1) A. The bridging angle C(1)—Si—C(1′) is 99.1°, while the Si—C(sp2) bond lengths range from 1.86 to 1.88 A. The exocyclic C(1)—Si bond makes an angle of 40° with respect to the plane of the cyclopentadienyl ring.

Notes. Synthesis and structural studies of some 1,1′-dichloroferrocene derivatives of platinum(II). Crystal and molecular structure of 2,2-µ-[(1–2,5–6-η-cis,cis-cyclo-octa-1,5-diene)platinio]-bis(1,1′-dichloroferrocene)

Abstract: The synthesis and characterisation of complexes of platinum, of the general formula [Pt(cod){Fe(C5H4Cl)(C5H3Cl)}L][cod =cis,cis-cyclo-octa-1,5-diene; L = Cl, Br, I, CH3, CH2Ph, or Fe(C5H4Cl)(C5H3Cl)], are reported. A single-crystal X-ray structure determination of [Pt(cod){Fe(C5H4Cl)(C5H3Cl)}2](R= 0.0485 for 2 553 independent reflections) showed a DL arrangement of the ferrocenyl groups, with a single crystal consisting of molecules of one enantiomer.

Polyferrocenylsilane-based polymer systems.

Abstract: The study of metallopolymers has blossomed into a mature field over the last few decades. Especially, polyferrocenylsilane (PFS) chemistry has taken a tremendous leap and continues to raise intense interest. Since the discovery of thermal ring-opening polymerization (ROP) of sila[1]ferrocenophanes, PFSs have been also accessed by anionic, cationic, transition-metal-catalyzed, and photolytic anionic ROP methodologies. A plethora of synthetic strategies have been devised, enabling access to a wide variety of copolymers, polyelectrolytes, and nanostructured materials. The distinctive physical properties and functions of many PFS-based polymers have been explored, leading to their apt exploitation in technical applications. Therefore, it is conceivable that PFS-related platforms might be indispensable nano-objects in the near future, as they stand on the verge of a new generation of sophisticated materials.

Strained metallocenophanes and related organometallic rings containing π-hydrocarbon ligands and transition-metal centers

Abstract: The structures, bonding, and ring-opening reactions of strained cyclic carbon-based molecules form a key component of standard textbooks. In contrast, the study of strained organometallic molecules containing transition metals is a much more recent development. A wealth of recent research has revealed fascinating nuances in terms of structure, bonding, and reactivity. Building on initial work on strained ferrocenophanes, a broad range of strained organometallic rings composed of a variety of different metals, pi-hydrocarbon ligands, and bridging elements has now been developed. Such strained species can potentially undergo ring-opening reactions to functionalize surfaces and ring-opening polymerization to form easily processed metallopolymers with properties determined by the presence of the metal and spacer. This Review summarizes the current state of knowledge on the preparation, structural characterization, electronic structure, and reactivity of strained organometallic rings with pi-hydrocarbon ligands and d-block metals.