Finite element approximation of a model for phase separation of a multi-component alloy with a concentration-dependent mobility matrix

We consider a model for phase separation of a multi-componentalloy with a concentration-dependent mobility matrix and logarithmicfree energy. In particular we prove that there exists a uniquesolution for sufficiently smooth initial data. Further, we provean error bound for a fully practical piecewise linear finiteelement approximation in one and two space dimensions. Finallynumerical experiments with three components in one space dimensionare presented.     

The crystal structure of 5-(2-nitrophenylmethylene)-2-thioxothiazolidin-4-one-3-(α-benzyl)ethanoic acid: Preference for the Z-configuration

X-ray crystal structure analysis of the title compound shows that it has the Z-configuration at the exocyclic double bond. Steric hindrance within the molecule is responsible for a considerable deviation from planarity in some regions of the molecule. The relationship of this compound to the structural pattern shown by other thiazolidin-4-one derivatives is briefly discussed.     

Catalytic, asymmetric synthesis of α-acetoxy amides

Non-racemic cyanohydrin acetates are readily available from aldehydes and potassium cyanide/acetic anhydride by use of bimetallic titanium (salen) catalyst 1. Treatment of the cyanohydrin acetates with a platinum(II) phosphinito catalyst 3 under neutral conditions results in chemoselective hydrolysis to the corresponding α-acetoxy amides in a racemization free process.