High oxidation state bromocarbyne complexes

Bromination of the carbyne complexes [W(RCR)Br(CO)2(dcpe)] (R = Ph, SiPh3; dcpe = 1,2-bis(dicyclohexylphosphino)ethane) provides high oxidation state derivatives [W(RCPh)Br3(dcpe)] and [W(RCBr)Br3(dcpe)], the latter via an unprecedented bromodesilylation process.DP17010269

An unusual alkylidyne homologation

The reaction of [W(CH)Br(CO)2(dcpe)] (dcpe = 1,2-bis(dicyclohexylphosphino)ethane) with tBuLi and SiCl4 affords the trichlorosilyl ligated neopentylidyne complex [W(CtBu)(SiCl3)(CO)2(dcpe)]. This slowly reacts with H2O to afford [W(CCH2 tBu)Cl3(dcpe)] and ultimately H2CCHtBu via an unprecedented alkylidyne homologation in which coordinated CO is the source of the additional carbon atom with potential relevance to the Fischer-Tropsch process.We gratefully acknowledge the Australian Research Council (DP170102695 and DP130102598) for fundin

Reactivity of a Terminal Methylidyne

Can we teach a new molecule old tricks? In late 2015, Hill et al. reported the synthesis of an organometallic compound unique in its stability and bond arrangement, a terminal methylidyne complex. Up until this point, only a few examples of terminal methylidynes had been reported in the literature, which decomposed at room temperature and were only achievable in milligram quantities. With access to gram-scale quantities of compound through the Hill group synthesis, we have been afforded the opportunity to thoroughly probe their reactivity. The research I am undertaking during my Honours year involves elucidating the reactivity of this molecule by subjecting it to a range of different conditions and reagents. Beginning with results reported by Templeton et al., our first course of investigation was to deprotonate the molecule and subsequently functionalise the deprotonated molecule. Several different reagents were tried to achieve this outcome with little success, however upon treatment with an incredibly aggressive deprotonation reagent, radically unexpected reactivity emerged. Organometallic chemistry, while foreign in name, pervades almost every aspect of our lives from the catalytic converters in our cars to playing a key role in the industrial production of vinegar, plastics and fertilizer. The amazing utility of metals to catalyse a host of useful reactions has provided an impetus to investigate the mechanisms by which these reactions take place. My research thus falls within this broader narrative of contributing to the wealth of knowledge on inorganic chemistry which has proved critical to the modern world.Student Services and Amenities Fee (SSAF) ; Student Extracurricular Enrichment Fund (SEEF

Heterobimetallic μ2-halocarbyne complexes

The halocarbyne complexes [M(CX)(CO)2(Tp*)] (M = Mo, W; X = Cl, Br; Tp* = hydrotris(dimethylpyrazolyl)borate) react with [AuCl(SMe2)], [Pt(η2-H2CCH2)(PPh3)2] or [Pt(η2-nbe)3] (nbe = norbornene) to furnish rare examples of μ2-halocarbyne complexes [MAu(μ2-CX)Cl(CO)2(Tp*)], [MPt(μ2-CCl)(CO)2(PPh3)2(Tp*)] and [W2Pt(μ2-CCl)2(CO)4(Tp*)2]. The complex [WPt(μ2-CCl)(CO)2(PPh3)2(Tp*)] spontaneously rearranges to the μ2-carbido complex [WPt(μ2-C)Cl(CO)2(PPh3)2(Tp*)] during silica-gel chromatography. One phosphine ligand of [WPt(μ2-CCl)(CO)2(PPh3)2(Tp*)] is readily substituted by CO to afford [WPt(μ2-CCl)(CO)3(PPh3)(Tp*)]. These μ2-halocarbyne complexes have been interrogated by spectroscopic, crystallographic and computational methods, the latter by reference to data for terminal halocarbyne precursors [M(CX)(CO)2(Tp*)].We gratefully acknowledge the Australian Research Council (DP190100723 and DP200101222) for fundin

Report of the Topical Group on Physics Beyond the Standard Model at Energy Frontier for Snowmass 2021

This is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More general explorations), and EF10 (Dark Matter at Colliders). The report includes a general introduction to BSM motivations and the comparative prospects for proposed future experiments for a broad range of potential BSM models and signatures, including compositeness, SUSY, leptoquarks, more general new bosons and fermions, long-lived particles, dark matter, charged-lepton flavor violation, and anomaly detection

Report of the Topical Group on Physics Beyond the Standard Model at Energy Frontier for Snowmass 2021

International audienceThis is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More general explorations), and EF10 (Dark Matter at Colliders). The report includes a general introduction to BSM motivations and the comparative prospects for proposed future experiments for a broad range of potential BSM models and signatures, including compositeness, SUSY, leptoquarks, more general new bosons and fermions, long-lived particles, dark matter, charged-lepton flavor violation, and anomaly detection

Report of the Topical Group on Physics Beyond the Standard Model at Energy Frontier for Snowmass 2021

International audienceThis is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More general explorations), and EF10 (Dark Matter at Colliders). The report includes a general introduction to BSM motivations and the comparative prospects for proposed future experiments for a broad range of potential BSM models and signatures, including compositeness, SUSY, leptoquarks, more general new bosons and fermions, long-lived particles, dark matter, charged-lepton flavor violation, and anomaly detection

Report of the topical group on physics beyond the standard model at energy frontier for snowmass 2021

This is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More general explorations), and EF10 (Dark Matter at Colliders). The report includes a general introduction to BSM motivations and the comparative prospects for proposed future experiments for a broad range of potential BSM models and signatures, including compositeness, SUSY, leptoquarks, more general new bosons and fermions, long-lived particles, dark matter, charged-lepton flavor violation, and anomaly detection