There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

Crystalline metal-organic frameworks (MOFs) are formed by reticular synthesis, which creates strong bonds between inorganic and organic units. Careful selection of MOF constituents can yield crystals of ultrahigh porosity and high thermal and chemical stability. These characteristics allow the interior of MOFs to be chemically altered for use in gas separation, gas storage, and catalysis, among other applications. The precision commonly exercised in their chemical modification and the ability to expand their metrics without changing the underlying topology have not been achieved with other solids. MOFs whose chemical composition and shape of building units can be multiply varied within a particular structure already exist and may lead to materials that offer a synergistic combination of properties.

The Chemistry and Applications of Metal-Organic Frameworks

Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

Hydrogen Storage in Metal–Organic Frameworks

N-Heterocyclic Carbenes in Late Transition Metal Catalysis

Organotin Biocides: XIII. C-Triorganostannylimidazoles, -benzoxazoles and -benzothiazoles

Reaction of AgBF4 with isonicotinic acid (NC5H4CO2H-4) led to the formation of an unusual polymeric structure consisting of Ag3 triangles linked together by two isonicotinate ligands: this co-ordination polymer, containing both bridged and unbridged short Ag· · ·Ag contacts has been characterised crystallographically.

Synthesis and structure of a co-ordination polymer based on silver(I) triangles linked by isonicotinate anions

ion of iodide from [Cp(CO)3MoI]
(Cp =
η5-C5H5) using the silver salt of the weakly coordinating anion [closo-CB11H11Br]−, initially affords an intermediate dimeric complex, [MoCp(CO)3I·Ag(CB11H11Br)]2, which has a central {AgI}2 core appended by two carborane anions in the solid state Prolonged reaction does result in elimination of AgI to form [MoCp(CO)3(CB11H11Br)], but not cleanly This complex can be isolated in good yield by hydride abstraction from [Cp(CO)3MoH] using the new trityl salt [CPh3][closo-CB11H11Br] Similarly, reaction of this hydride source with [CPh3][closo-CB11H6Br6] in CD2Cl2 results in hydride abstraction, but a mixture of products is formed, suggested to consist of the hydride bridged dimer, [{Cp(CO)3Mo}2(μ-H)][closo-CB11H6Br6], the anion coordinated complex [Cp(CO)3Mo(closo-CB11H6Br6)] and the solvent adduct [Cp(CO)3Mo(ClCD2Cl)][closo-CB11H6Br6] Reaction of Ag[closo-HCB11Me11] with [Cp(CO)3MoX]
(X = Cl, I) results in a intermediate complex which has a [Cp(CO)3MoX]6Ag2 central core (crystallographically characterised for X = I) with no interactions from the permethylated carborane anions Prolonged reaction does result in partial AgX elimination to form the halide-bridged dimers [{CpMo(CO)3}2(μ-X)][closo-HCB11Me11] Hydride abstraction from [Cp(CO)3MoH] using the new trityl salt [CPh3][closo-HCB11Me11] resulted in the clean formation of the hydride-bridged dimer [{Cp(CO)3Mo}2(μ-H)][closo-HCB11Me11] The two anions [closo-CB11H6Br6]− and [closo-HCB11Me11]− have been compared with [B(ArF′)4]−
[ArF′
= 3,5-bis(trifluoromethyl)phenyl] in Bullock's ionic hydrogenation of 3-pentanone using [Cp(CO)2(PPh3)Mo]+ catalysts The permethylated anion slightly outperforms its hexabrominated congener in catalysis, but is still slower than [B(ArF′)4]−

Investigation of the synthesis of {Mo(η5-C5H5)(CO)3}+ fragments partnered with the monoanionic carboranes [closo-CB11H11Br]−, [closo-CB11H6Br6]− and [closo-HCB11Me11]− by silver salt metathesis and hydride abstraction

https://purehost.bath.ac.uk/ws/files/77221104/Solid_state_interconversion_of_cages_and_coordination_networks.pdf

Solid state interconversion of cages and coordination networks via conformational change of a semi-rigid ligand

The synthesis and X-ray crystal structure of the new keto-functionalised N-pyrrolyl phosphine ligand PPh2NC4H3{C(O)CH3}-2 L is reported. The ligand coordinates to molybdenum(II) as either a uni- or a bi-dentate ligand, and the reversibility
 of the ketone coordination is demonstrated by the interconversion of the complexes [MoCl(CO)2(L-κ1P)(η5-C5H5)] 1 and [Mo(L-κ2P,O)(CO)2(η5-C5H5)][BF4] 
2 on abstraction or addition of chloride.
 The X-ray
 crystal structure of 1 is also reported.

Mary F. Mahon

Papers

Organotin Biocides: XIII. C-Triorganostannylimidazoles, -benzoxazoles and -benzothiazoles

Synthesis and structure of a co-ordination polymer based on silver(I) triangles linked by isonicotinate anions

Investigation of the synthesis of {Mo(η5-C5H5)(CO)3}+ fragments partnered with the monoanionic carboranes [closo-CB11H11Br]−, [closo-CB11H6Br6]− and [closo-HCB11Me11]− by silver salt metathesis and hydride abstraction

Solid state interconversion of cages and coordination networks via conformational change of a semi-rigid ligand

Functionalised N-pyrrolyl phosphines: synthesis and molybdenum chemistry of a new ketophosphine