Showing papers by "Sujit Roy published in 2001"
TL;DR: In this article, organics and iodides react with diorganodisulfides in the presence of stannous chloride and catalytic cupric halide, giving rise to corresponding unsymmetrical sulfides.
27 citations
TL;DR: Facile synthesis of homoallylic alcohols is achieved from allyl halides and aldehydes or ketones over an all-oxide heterogenous media involving beta-SnO and catalytic Cu2O.
25 citations
Patent•
28 Mar 2001TL;DR: In this paper, a process for the preparation of a diorganotrisulfide was described by reacting an organic halide and elemental sulfur (α-rhombic) using catalytic copper (II) halide, and tin (II), in a mixture of organic solvents at 30-70° C.
Abstract: The present invention discloses a process for the preparation of a diorganotrisulfide said process by reacting an organic halide and elemental sulfur (α-rhombic) using catalytic copper (II) halide and tin (II) halide in a mixture of organic solvents at 30-70° C.
8 citations
TL;DR: In this article, the authors investigated the effects of reaction parameters such as bulk density of compacts, amount of inert dilutions and atmospheres on velocity of combustion wave propagation and combustion peak temperature.
Abstract: Combustion of powder mixtures under adiabatic conditions -Self-propagating High-temperature Synthesis (SHS)-is an efficient and attractive technique to synthesize a host of materials for high technology applications, namely, ceramics, intermetallics, composites and functionally graded materials. Conditions necessary for and general features of this technique are briefly reviewed. Experimental investigations on synthesis of nickel monoaluminide from stoichiometric mixtures of component powders by this technique using plane-wave propagation mode is carried out. Effects of reaction parameters namely, bulk density of compacts, amount of inert dilutions and atmospheres on velocity of combustion wave propagation and combustion peak temperature are investigated. From the dependence of propagation velocity on combustion temperature an activation energy of 170.99 kJ/mole is obtained for SH-synthesis of NiAl. The synthesized products showed equiaxed large grained microstructures.
3 citations