The complexation behavior of a series of paraquats (G1.2PF(6)-G5.2PF(6)) and bis(pyridinium) derivatives (G6.2PF(6)-G14.2PF(6)) with pillar[5]arene (P5A) host has been comprehensively investigated by (1)H NMR, ESI mass and UV-vis absorption spectroscopy. It is found that P5A forms 2 : 1 external complexes with N,N'-dialkyl-4,4'-bipyridiniums (G1-G4.2PF(6)); while it forms 1 : 1 pseudorotaxane-t...

Macrocyclic Schiff bases have been synthesized by the condensation of acetyl acetone with semicarbazide hydrochloride and thiosemicarbazide in presence of methanol. Further, their oxovanadium complexes have been synthesized by using vanadium acetylacetone. The structural assignment of these compounds has been made on the basis of MP, TLC, MW determination, conductivities, elemental analysis and...

The title compound, C(7)H(10)F(6)O(4), was isolated as an unexpected product from a reaction of tantalum(V) methoxide with hexa-fluoro-acetyl-acetone in a methanol solution. The asymmetric unit consists of one half-mol-ecule with the middle C atom lying on a twofold axis. The crystal structure is stabilized by O-H⋯O and an array of C-H⋯F hydrogen-bonding inter-actions. These inter-actions link ...

An acetone powder of cat brain catalyzed the synthesis of two radioactive products when incubated with L-aspartate-14C and acetyl coenzyme A. The products were identified as Nacetyl-aspartic acid and citric acid. A water extract of the powder contained the system that produced citrate-14C, while the residue contained the aspartate N-acetyltransferase activity. The soluble system rather than the...

Earlier studies have shown that Furacinl inhibits the formation of acetyl coenzyme A2 from pyruvate anaerobically (1). Acetone powder preparations of pigeon liver and rat testis were used in the early work. The results suggested that Furacin inhibits reactions mediated by pyruvic oxidase; therefore, further studies were continued with more highly purified preparations of this enzyme from pigeon...

The reaction of the methylidyne radical (CH) with acetone ((CH(3))(2)C[double bond, length as m-dash]O) is studied at room temperature and at a pressure of 4 Torr (533.3 Pa) using a multiplexed photoionization mass spectrometer coupled to the tunable vacuum ultraviolet synchrotron radiation of the Advanced Light Source at Lawrence Berkeley National Laboratory. The CH radicals are generated by 2...

Eines der Ziele für die Realisierung nachhaltiger chemischer Syntheseverfahren ist direkte Nutzung des Treibhausgases CO2 als Rohstoff Produktion von Grund- und Feinchemikalien, wie z. B. Pharmazeutika, Duftstoffe Lebensmittelzusatzstoffe. In dieser Studie präsentieren wir eine modulare In-vitro-Plattform kontinuierliche Umwandlung in komplexe Kohlenstoff-Verbindungen, Monoterpene (C10), Sesqui...