Two ligands have been synthesized by derivatisation of cyanuric chloride: 6-(diethylamino)-2,4-disulfanyl-1,3,5-triazine (H2SSta) 1 and 6-(diethylamino)-2-hydroxo-4-sulfanyl-1,3,5-triazine (H2OSta) 2 characterised X-ray crystallography, which shows intermolecular hydrogen bonding in the solid state, leading to dimers ribbons 2. On reaction with metal salts both undergo oligomerisation reactions. Compound reacts nickel chloride form a mononuclear complex, [Ni{(Sta)S(S2ta)}] 3. In 3 two...

The highest nuclearity complex containing cobalt consists of cubic-close packed planes hydroxide, methoxide or chloride anions, bridging cobalt(II) centres; preliminary magnetic studies indicate a high-spin ground state and the possibility superparamagnetic behaviour.

The synthesis, structural characterisation and preliminary magnetic studies of a Co12 wheel are reported; the investigations reveal that electronic ground state has spin S = 6, which corresponds to ferromagnetic interactions between twelve Co(II) ions.

For a wet clutch in an automatic transmission to operate efficiently and smoothly, it is essential that the friction contact be high over whole sliding speed range also increase with speed. This achieved by careful design, both of disc material morphology fluid. article describes development use new test rig, based on mini-traction machine (MTM), measure impact versus properties additive solutions as well fully formulated fluid (ATF). It found most organic modifiers reduce at low speed,...

The structures of new heterometallic tetranuclear complexes have been determined which each feature two 3d-metal centres, either Co or Ni, and 4f-metal sites; preliminary magnetic data also reported.

A wet clutch in an automatic transmission has very specific and unusual friction characteristics. For the to operate efficiently without stick–slip, must both increase with sliding speed be high over whole range. This is achieved by use of a rough material, which inhibits fluid film formation, combined sophisticated design fluid, separate additives reduce at low speed. There been much debate literature as underlying mechanism that allows article critically discusses main models have...

Two polymetallic iron(III) complexes 1 and 2 have been synthesised from the known corrosion inhibitor 3-(4-methylbenzoyl)-propionic acid HL1 their crystal structures determined. Coordination geometries extracted these used as basis for molecular modelling onto idealised oxide surfaces an aid to understanding efficacy of inhibitors 4-keto type. The proposed mode action involves 1,3-bridging didentate coordination carboxylate function L1 two FeIII ions, hydrogen-bond formation between group a...

The synthesis and structural characterisation of a series cobalt nickel cages are reported. Eight these structures contain [M10(mu3-OH)6(eta2, mu3-xhp),(eta2, mu2-O2CR)6]2+ core (where M = Co or Ni; xhp 6-chloro- 6-methyl-2-pyridonate: R Me, Ph, CHMe2, CH2Cl, CHPh2 CMe3), where the ten metal atoms describe centred-tricapped-trigonal prism (ttp). cage contains six hydroxide ligands around central metal, exterior is coated with pyridonate carboxylate ligands. For four additional centres found...

A method is presented for imputing a topology any chronological set, i.e. set with chronology relation, such as spacetime or some sort of boundary. This shown to have several good properties, replicating the manifold and expected simple examples spacetime-with-boundary; it also allows complete categorical characterization, in topological categories, future causal boundary construction Geroch, Kronheimer Penrose (GKP), showing that universal property future-completing sets spacelike...

Any chronological spacetime V with a complete timelike conformal-Killing field (with monotonic conformal factor) admits global change of metric for which the is truly Killing. Furthermore, (globally) principle line bundle over manifold Q (the space Killing orbits), and diffeomorphic to R1*Q.

Diabetic foot complications are increasingly burdensome for patients, clinicians, and society. Development of innovative therapies to support good quality basic care is a priority among those with an interest in this area. One these involves scanning printing tissues match conform defect (so-called 3D printing).A single-arm pilot study ten consecutive patients history chronic diabetic ulcer (DFU), treated autologous minimally manipulated homologous adipose tissue (AMHAT), dispensed by...

The purpose of this note is to establish, in a categorical manner, the universality Geroch-Kronheimer-Penrose (GKP) causal boundary when considering types structures that may profitably be put on any sort for space–time. Actually, can only done future (or past boundary) separately; furthermore, chronology relation, not causality considered, and GKP topology eschewed. final result there unique map, with proper properties, from space–time onto “reasonable” which supports some chronological...

Potentially bidentate 4-diazopyrazol-5-one ligands carrying a range of substituents can readily be prepared by coupling arene diazonium salts on to the appropriate pyrazolones. Hydrocarbon-soluble versions are shown suitable reagents for recovery copper solvent extraction from ammoniacal leach solutions, and potentially have greater resistance chemical degradation than β-diketones which been used. Cobalt(III), nickel(II), copper(II) zinc(II) complexes with...

Avoidance of a metal–metal bond is significant factor favoring the formation nonanuclear cobalt complex [CO9(chp)18] (framework depicted on right; chp = 6-chloro-2-pyridonate). The homoleptic, which unusual for 3d-complexes pyridonates, and this contrasts with similar, but heteroleptic, nickel double adamantane frameworks also reported.

Four new Co complexes are reported which illustrate routes to high nuclearity species; these include a dodecanuclear 'chain of cubes' and tridecanuclear species features tetranucleating phthalate ligand.

The reaction between LiAlH(4) and pyridine, 4-methylpyridine, or 3,5-dimethylpyridine results in hydride transfer to the pyridine ring give tetrakis(pyridine)lithium tetrakis(1,4-dihydropyrid-1-yl)aluminate(III), 1, tetrakis(4-methylpyridine)lithium tetrakis(1,4-dihydro-4-methylpyrid-1-yl)aluminate(III), 2, tetrakis(3,5-dimethylpyridine)lithium tetrakis(3,5-dimethyl-1,4-dihydropyrid-1-yl)aluminate(III), 3, respectively. We claim that instead of lithium is compound which known as Lansbury's...

The topology of the causal boundary for standard static spacetimes—spacetimes time-invariantly conformal to a metric product Lorentz line and Riemannian manifold—is studied in depth. As this is given terms set real-valued functions on factor, one could use function-space topology, but physical reasons recommend chronological instead. has simple structure, while might not. This paper examines when coincides with it structure. A class spacetimes examined, all which yield structure boundary;...

This is intended as an analysis of the global properties static and stationary spacetimes with complete (timelike) Killing field, particular attention to quotients by group actions. presented in terms algebraic structures which are fairly simple for case more involved case; most important tool, fundamental cocycle, a cohomological class but somewhat looser structure case. In particular: (1) A new measurement, similar spacetime interval Minkowski space, devised detecting whether two points...

Simple organic molecules can have many functions. The active ingredient in the corrosion inhibitor 3-(4-methylbenzoyl)propionate works because it addresses metal sites of a surface through carboxylate groups, forms hydrogen bonds with hydroxide groups (see picture), and provides excellent coverage efficient packing substituted aromatic groups.