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This paper analyzes the variation of ultrasonic wave velocities in glasses with change in compositions based on the variation of Poisson’s ratio (ν) and fractal bond connectivity (d) of these glasses. It shows that for the same Poisson’s ratio value, the ratio of ultrasonic shear wave velocity to longitudinal velocity is independent of the composition and varies linearly with the longitudinal velocity. The suggested linear variation of velocity ratio with longitudinal velocity shows a good agreement with the experimental data obtained from the previously published studies.

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A simple and efficient protecting group free synthesis of a relatively new fungicide Mandipropamid has been achieved in five steps, with an excellent overall yield. The synthesis started from commercially available starting materials like vanillin and p-chloroacetophenone. The key steps involved in the synthesis are the Henry and Cannizzaro reactions, as well as amide formation through a carboxylic acid-amine coupling step.