At 293 K, the slow magic angle spinning carbonyl subspectrum of crystalline 13CO-labelled tricarbonyl(hexahapto-hexamethylbenzene)chromium(0) (1) displays an extensive manifold of spinning side bands. These have been analysed to yield the principal elements of the shielding tensor which are appr...
Core and valence region XPS spectra of methyl-substituted benzene chromium tricarbonyl complexes have been measured at low (170K) temperature. The core levels were found to be unchanged by the addition of the electron-donating groups on the ring, whilst the shifts in the valence bands have been ...
Ab initio SCF calculations predict that the charge densities on the aryl carbons of Cr(boat p-xylene)(CO)3 and also the difference in charge density from the free boat p-xylene are dependent on the degree of deformation of the boat. This prediction is consistent with the observed geometry-depend...
Tricarbonyl hydride derivatives of cyclopentadienyl-chromium, -molybdenum and -tungsten compounds covalently linked to a macroreticular polystyrene support are obtained by treatment of polystyrene-attached cyclopentadienyl anions with the respective metal hexacarbonyl and subsequent acidificatio...
Premarin™ is the most commonly prescribed estrogenic component of hormone therapy, given since 1942. The current study is the first examining cognitive effects of tonic Premarin treatment in an animal model. Middle-aged ovariectomized (Ovx) rats received vehicle or one of three doses of Premarin...
Menopause is associated with cognitive decline, and hormone therapies (HTs) may improve cognition depending on type and timing of HTs. Previous parity may influence cognition in later life. We investigated how primiparity and long-term ovariectomy influence cognition, neurogenesis, hormones, cyt...
Ergot alkaloids are secondary metabolites produced by fungi of the species Claviceps. Toxic effects after consumption of contaminated grains are described since mediaeval times. Of the more than 40 known ergot alkaloids six are found predominantly. These are ergotamine, ergocornine, ergocryptine...
The sea slug Pleurobranchus forskalii is a carnivorous scavenger that is widely distributed in shallow subtidal areas. Very few investigations of the chemical components of this gastropod have been reported. In this study we performed a comprehensive analysis of an extract of the marine mollusc,...
Nowadays psychoactive plants marketed as “legal highs” or “herbal highs” increase in popularity. One popular “legal high” are the seeds of the Hawaiian baby woodrose Argyreia nervosa (Synonym: Argyreia speciosa, Convolvolus speciosus). At present there exists no study on A. nervosa seeds o...
The effects of pelleting feed containing cereal ergot alkaloids was evaluated in performance and nutrient digestibility trials using growing lambs. Defined concentrations of ergot alkaloids [Control (C), no added alkaloids but background concentrations of ∼3 ppb; Low (L), ∼169 ppb; High (H), ∼...
Sorghum ergot is a disease caused commonly by C. africana. In 2015, ergot was identified for the first time in sorghum fields in Israel, leading to measures of eradication and quarantine. The aims of the study were to identify the ergot species by molecular and ergot alkaloid profile analysis, t...
Changes in the concentrations of six major R-configuration ergot alkaloids (EA) and their S-configuration epimers were studied during the entire process of rye sourdough bread production. The EA were practically stable at the sourdough and dough preparation stages; however, significant reduction...
An iron methyl complex Cp*(CO)2Fe(Me) reacts with silylferrocene HSiR2Fc (Fc = C5H4FeC5H5, R = Me, Ph) to afford the iron complex with a ferrocenylsilyl ligand, Cp*(CO)2Fe(SiR2Fc) (R = Me: 1, Ph: 2). On the other hand, the reactions of a ruthenium methyl complex Cp*(CO)(py)Ru(Me) with 2 equiv of...
Membraneless redox flow batteries reported to date are microscale designs that have shown poor capacity retention and cyclability due to reactant crossover. Here, we present a new design of macroscale membraneless redox flow battery capable of recharging and recirculation of the same electrolyte...
A series of bis(pentamethylcyclopentadienyl)metal derivatives, and related complexes, including [Mo(C5Me5)2X2] (X2 = H2, Cl2, I2 or O), [W(C5Me5)2X2] (X = H, Cl or CH3), [W(C5Me5)(C5Me4CH2)Cl], [Re(C5Me5)2], [Re(C5Me5)(C5Me4CH2], [Re(C5Me5)2(NO)], [Rh(C5Me5)(C5Me5H)], [Rh(C5Me5)3][BF4], [{rh(C5M...
The thermal and photochemical reactions of [(C5Me5)Fe(CO)2]2 with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) yield the binuclear complex {[(C5Me5)Fe(CO)2]2·(DDQ)2}. EPR studies using nitroso spin traps support the conclusion that the primary products are [(C5Me5Fe(CO)2]+ radicals. The metal-cen...
Hexafluorophosphates of (η5-pentamethylcyclopentadienyl)(η6-arene)ruthenium cations (arene = 1,3,5-triethylbenzene, 1,3,5-tris(trimethylsilylmethyl)benzene, and pentamethylbenzene) have been obtained from the reaction of [Ru(η5-C5Me5)(NCCH3)3]+PF6− with the appropriate arene; their X-ray sing...
[(C5Me5)Fe(CO)2]2 (A) reacts with one equivalent of tetracyanoethylene (TCNE) and tetracyanoquinodimethane (TCNQ) to give the compounds {2[(C5Me5)Fe+(CO)2]·TCNE2−} (B) and {2[(C5Me5)Fe+(CO)2]·TCNQ2−} (D) respectively. The reaction of A with two equivalents of TCNE gives the polymeric compound ...
A heat-flow Calvet microcalorimeter was adapted for the measurement of sublimation enthalpies by the vacuum-drop method, with samples of masses in the range 1 mg to 5 mg. The electrically calibrated apparatus was tested by determining the enthalpies of sublimation of benzoic acid and ferrocene, ...
The structure of Fe(C5Me5)(2,4-C7H11) has been determined (C7H11 = dimethylpentadienyl), and found to be isomorphous with its ruthenium analogue. The Fe–C bond distances for the open pentadienyl ligand have been found to be about 0.02 Å shorter than those for the aromatic pentamethylcyclopentad...
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