Jet flow around an elastic plate

An iteration method to solve a certain class of nonlinear plane jet problems of static hydroelasticity is proposed. The convergence of simple iterations is proved. The problem of the symmetric flow around an elastic plate is solved by the Kirchhoff scheme as an illustration.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 4, pp. 35–42, July–August, 1976.The authors are grateful to G. Yu. Stepanov who supervised the present research.     

Nonadiabatic effects in diatomic molecules on resonant continuum Raman scattering

Journal of Applied Spectroscopy -     

Theory of the effects of nuclear structure on internal conversion in Tl203

The Fermi-liquid method is applied to consider the effects of the strong interaction on the penetration matrix element for the conversion transition in Tl²⁰³. The theoretical value agrees well with experiment.We are indebted to M. A. Listengarten for discussions.     

An efficient procedure for the preparation of 4-substituted 5-aminoimidazoles

The preparation of O-methylimidates from alpha-aminonitriles and their subsequent co-cyclization with primary amines to afford 4-substituted 5-aminoimidazoles was studied. It was found that the mildly acidic pyridinium p-toluenesulfonate efficiently catalyzed each stage of the reaction sequence: (a) the formation of the O-methylimidates, (b) their co-cyclization with a variety of primary amines, and (c) certain derivatizations of the resultant heterocycles. The developed reaction conditions tolerate a wide variety of alpha-aminonitriles and primary amine co-reactants. Thus, it is possible to easily prepare a diverse array of substituted heterocyclic compounds in good yield. The requisite alpha-aminonitriles were synthesized either from amino acids or by phase-transfer alkylation of a glycine anion equivalent. The unstable free 5-aminoimidazoles were normally protected in situ to provide derivatives (methyl imidates or N,N-dimethylamidines) that were amenable to characterization.