The syntheses and molecular structures of six- and five-coordinated rhodium(III) corroles (by pyridines and a chiral amine, respectively) and the rhodium(I) complex of a chiral corrole are described, together with some interesting features in the NMR spectra of the complexes and their utilizatio...

The electrodeposition of Rh from acidic sulfate media has been investigated. It is shown that, although nominally identical rhodium sulfate solutions prepared from different sources of Rh(III) have different speciations, their electrochemistry is the same and also simple. Good quality Rh electro...

The kinetics of the reaction between cyclopentanone and cyclohexanone with hexacyanoferrate(III) ion catalyzed by rhodium(III) chloride in alkaline medium has been investigated at four temperatures. The data show that the reaction follows first order kinetics with respect to hydroxide ion and cy...

Cyclometalated rhodium(III) and iridium(III) complexes were synthesized with imidazolyl modified phenanthroline ligands (1–2) of general formula [M(ppy)2(1)]Cl [M = Rh/Ir] and [{M(ppy)2}2(2)]Cl2 [M = Rh/Ir] (3–9). All the compounds 1–9, have been characterized spectroscopically to reveal thei...

The present work is devoted to simultaneous ion exchange recovery of platinum(II, IV) and rhodium(III) from sulfate–chloride solutions, freshly prepared and stored over 3 months, on commercial macroporous anion exchangers with different chemical structures. The sorption was carried out from sol...

Trivalent rhodium was determined spectrophotometrically as its 1:2 rhodium o-methylphenyl thiourea (OMPT) complex, extracted into chloroform from aqueous acetate buffer media at pH 5.4. The complex exhibits maximum absorption at 320 nm (Molar absorptivity 9.76 × 103 L mol−1 cm−1), Sandell’s se...

Benzenethiol is reacted with acetic acid in a hydrogen stream over [(Mo6Cl8)Cl4(H2O)2]·6H2O. Catalytic activity of the clusters appears above 200 °C, yielding S-phenyl thioacetate. The selectivity is 98% at 300 °C. Niobium, tantalum, and tungsten halide clusters with the same octahedral metal...

Indolones 4 and 5, and indolyl-aminoacids 6a–e, 7a–e, and 8a and 8b were designed by structural modification of lead compound 3. These compounds were tested on six tumor cell lines to determine the role of the azepinone ring and the N-phenyl substituent in the cytotoxicity of 3. Our results sh...

A study was made of the excretion of radioactivity in bile of male rats after administration of orphenadrine hydrochloride and tofenacin hydrochloride in labelled forms. In bile fistula rat it was found, particularly after intravenous administration, that biliary excretion was considerable: afte...

The structures of trans-2-butenoyl chloride (crotonyl chloride) and 3-methyl-2-butenoyl chloride have been investigated by gas-phase electron diffraction at 343 and 336 K, respectively. Trans-2-Butenoyl chloride consists of a mixture of two conformer with the double bonds anti or syn to each oth...

The low resolution spectra of crotonyl chloride and crotyl alcohol have been studied in the microwave R-band region. The spectroscopic constant (B + C) has been evaluated for both molecules. These data have been used to obtain conformational information for these molecules.

SummaryAcetylation of histones at DNA regulatory elements plays a critical role in transcriptional activation. Histones are also modified by other acyl moieties, including crotonyl, yet the mechanisms that govern acetylation versus crotonylation and the functional consequences of this “choice”...

The regiochemistry of aza-annulation of enaminones with α,β-unsaturated acid chlorides bearing hydrogen atoms on the γ-carbon is reversed when triethylamine is used as mediator. When the reaction was carried out at lower temperatures a 3-acyl β,γ-unsaturated compound could be isolated which...

Infrared spectra of liquid samples of crotonyl chloride and dimethyl acryl chloride in the region 4000-600 cm−1 have been recorded along with the Raman spectra in the region 4000-100 cm−1. From CNDO/2 results and some band splitting, existence of conformers are inferred. A complete assignment of...

Selected imines reacted with hexafluoroacetone non-catalyzed at ambient temperature to give β-hydroxy-β-bis(trifluoromethyl) imines in good to excellent yields. For the imines of acetone, pentan-3-one, and of cyclohexanone a 1:2 reaction was observed giving iminodiols; for N,N′-bis(propyliden...

In a continuation of our studies into indan and tetralin systems as novel modulators of allergic and inflammatory phenomena, we have extended our work to include dimers linked via C–C bonds. Of these compounds, 2-Benzyl-2-[2-phenyl-1-ethenyl]-1,2,3,4-tetrahydro-1-naphthalenol 12 exhibited most ...

SummaryThe inhibition constants (Ki) and modes of inhibition have been determined for Nα-phosphoryl-L-alanyl-L-proline and Nα-phosphoryl-L-valyl-L-tryptophan against rabbit pulmonary angiotensin converting enzyme (dipeptidyl carboxpeptidase, E.C. 3.4.15.1). Phosphorylalanylproline and phosphor...

Reactions of 2,4,6-tris(fluorosulfonyl)chlorobenzene 1 with O-, N-, S-, C-nucleophiles and F-anion showed high reactivity of 1 that was defined by three strong electron withdrawing SO2F groups creating several electrophilic centers within the molecule. Conditions for selective chlorine atom subs...

Heteroleptic cyclometalated platinum (II) complexes bearing diarylamino-functionalized 1-phenylisoquinoline derivatives as primary ligand and acetyl acetonate as ancillary ligand were prepared and characterized. Single-crystal X-ray diffraction revealed that platinum (II) (4-(isoquinolin-1-yl)-N...

A series of new heteroleptic iridium complexes bearing fluorenyl-modified 1-phenylisoquinoline as the first ligand and different ancillary ligands has been prepared and characterized. These complexes bis(1-(3-(9,9-dimethyl-fluoren-2-yl)phenyl)isoquinoline-C2,N′)iridium(III)acetylacetonate(Ir(DM...