Metal alkoxides containing more than one sort of metallic element are predominantly known in the field of heterobimetallic derivatives. In order to pass to heterotrimetallic homoleptic alkoxides bimetallic alkoxides have to be prepared which are at the same time heterobimetallic and heteroleptic...

(Li·3DME(η5-C5H5)3NdC6H5], 1 was synthesized by the reaction of NdCl3·2LiCl, 2 equivalents of cyclopentadienylsodium and one equivalent of phenyllithium in THF at −78°C, and crystallized from THF and DME. The crystal structure of 1 was determined by X-ray diffraction method at −80°C. The cr...

The homoleptic tris(substituted cyclopentadienyl)lanthanide(III) complexes [LnCpR3] (Ln=La (1), Ce (2), Pr (3), Nd (4), Sm (5), Gd (6), Tb (7), Dy (8), Er (9), Tm (10) and Yb (11)], [NdCpt3] (12), [CeCptt3] (13) and [NdCptt3] (14) [CpR=η5-C5H4{CH(SiMe3)2, Cpt=η5-C5H4(SiMe2But), Cptt=η5-C5H3(S...

By comparing the room temperature absorption spectrum of a tetrahydrofuran adduct derived from tris(indenyl)-praseodymium (III) in the solid state with those of adducts derived from tris(η5-cyclopentadienyl) -praseodymium (III) it could be proved that the indenyl ligand is pentahapto bonded at ...

By comparing the absorption spectrum of an oriented single crystal of the n-butylacetate adduct derived from tris (η5-cyclopentadienyl)-praseodymium(III) with the corresponding absorption spectrum run as pellet or solution, the excited terminal crystal field states of A1 and E symmetry, respect...

By comparison of the energies of the observed bands in the low temperature absorption spectrum of tris(η5-cyclopentadienyl)-praseodymium(III)-cyclohexylisocyanide with the calculated crystal field splitting pattern (which is based on a fit of 17 signals in the magnetic circular dichroism spectr...

The low temperature absorption spectrum of tris(η5-cyclopentadienyl)-praseodymium(III) dissolved in a 2-methyltetrahydrofuran glass has been measured. The observed transitions, along with the previously reported magnetic circular dichroism transitions, have been assigned and fitted to the param...

The previously derived crystal-field splitting pattern of a cyclohexylisocyanide adduct of tris(η5-cyclopentadienyl)-praseodymium(III) has been fitted to the parameters of a semi-empirical Hamiltonian with an r.m.s. deviation of 31.7 cm−1 for 44 levels. The crystal-field parameters obtained are...

In the low temperature MCD spectra of tris(η5-cyclopentadienyl)-praseodymium(III) adducts some Faraday A terms of positive and negative signs, respectively, could be observed. As the singlet CF ground state is of A1 symmetry, the observed Faraday A terms are due to transitions to excited E stat...

The formation of nanofibrillar polyaniline–polyvinyl sulfonate (Pani-PVS) composite by electropolymerization of aniline in the presence of ferrocenium hexafluorophophate (FcPF6) and its application in mediated-enzyme biosensor using the horseradish peroxidase/hydrogen peroxide (HRP/H2O2) enzyme...

The interdigitated and layered structures of the tetraalkylferrocenium salts [DEC][CB11H12], [DEC]2[B12F12], [DEC][BF4], [DEC][PF6], and [DEC][ClO3] were determined by single-crystal X-ray diffraction (DEC+ = 1,1′,3,3′-tetrakis(2-methyl-2-nonyl)ferrocenium(1+)). The structures of the salts of ...

Commercial ferrocenium hexafluorophosphate ([FeCp2]PF6) was found to be an efficient catalyst for the etherification of terminal, tertiary propargylic alcohols with primary and secondary alcohols (5 h to 3 days reaction time at 40 °C in CH2Cl2, 3 mol% catalyst loading). The propargylic ether pr...

Dicarbonylcyclopentadienyliron complexes σ-bonded through nitrogen to pyrrolyl-, 2-acetylpyrrolyl-, indolyl-, 1,2,3,4-tetrahydrocarbazolyl- and carbazolyl-groups are described.

Intermediates and transition states of the reaction cycle for the trimerisation of ethene catalysed by the initial catalyst precursor [η5-CpCrCl2]2 have been characterised by modeling, starting from the species η5-CpCrMe2. This is a simplified model system of the actual catalytically active sy...

Four new pyrrolyl complexes of Ni(II) and Pd(II) have been prepared and characterized. These complexes undergo oxidative polymerization to give semiconducting materials with conductivities as high as 0.025 S/cm. When polymerized in the presence of dodecylbenzenesulfonic acid, the polymers are so...

Force field and semi-empirical MO calculations are used to predict the behavior of dicarbonyl(η5-cyclopentadienyl) (η1-pyrrolyl)iron(II) (Fp-pyr, 1) under conditions commonly used to polymerize pyrrole. We also discuss similar calculations which were performed on a hypothetical tetramer. Detai...

Binding of Streptomyces pepsin (EC 3.4.23.1) inhibitor to the active site of pepsin caused a characteristic ultraviolet difference spectrum having a trough around 298 nm which suggests that tryptophan residue(s) are involved in a decreased refractive index or different charge density. The fluore...

The present study was undertaken to select exclusive indigenous actinobacterial probiont for broiler health improvement based on in vitro probiotic potentials. In total, 18 actinobacterial cultures isolated from chicken were screened for survivability (resistance to low pH, pepsin, bile and panc...

Pepsin from porcine gastric mucous shown catalytic promiscuity was first discovered to catalyze the Morita–Baylis–Hillman (MBH) reaction between aromatic aldehydes with 2-cyclohexen-1-one or 2-cyclopenten-1-one in a two-phase medium of phosphate buffer/cyclohexane in the presence of 1,4-diazab...

The fluorescence of tryptophan residues of Rhizopus chinensis aspartic protease was quenched about 25% upon binding with an inhibitor, Streptomyces pepsin inhibitor (acetylpepstatin). The kinetics of binding between the enzyme and the inhibitor was studied by the fluorescence stopped-flow method...