http://nopr.niscpr.res.in/handle/123456789/44008 2026-10-09T08:21:42Z http://nopr.niscpr.res.in/handle/123456789/44068 Title: Activation hardness and sigmatropic shifts Authors: Ray, N K; Rastogi, R C Abstract: Modes of sigmatropic shifts have been examined from a consideration of the hardness parameters of the transition states. The results obtained are in agreement with the well known Woodward-Hoffmann rules. Change in chemical potential has also been examined for the reaction path. Page(s): 927-929 1993-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44067 Title: Applications of graph theory in solution thermodynamics Authors: Singh, Prem paul Page(s): 930-936 1993-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44066 Title: Strong metal support interaction (SMSI) state in titania supported iron catalysts-EHMO model cluster calculations Authors: Viswanathan, B; Lakshmi, T Abstract: The phenomenon of strong metal support interaction (SMSI) has been explained on the basis of clusters of metal particles being formed on the surface of the support which could account for the reduction in chemisorptions capacity after inducement of SMSI state on reduction at high temperatures. Models have been chosen to represent the encapsulation state which could also account for the reduction in chemisorption capacity. The increased hydrogenation activity of these systems is explained on the basis of the orbitals of the clusters which interact suitably with the orbitals of CO in such a manner as to facilitate its dissociation. Page(s): 937-941 1993-11-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44065 Title: Thermochemical investigations of some 2-propanone-tribromomethane-alkane ternary non-electrolytic solutions Authors: Singh, Prem Paul; Maken, Sanjeev; Malik, Renu Abstract: Moelywyn-Huggins concept of interactions between the molecular surfaces of the components of a binary mixture [Huggins M L, <em>Polymer, </em>12 (1971) 389] has been extended to develop an approach reproduces well the molar excess volume <em>V</em>^E and molar excess enthalpy <em>H</em>^E data of 2-propanone- tribromomethane-<em>n</em>-alkane ternary and their sub-binary mixtures. The ternary <em>V</em>^F and <em>H</em>^E data, calculated by the present approach, co pare better with their corresponding experimental values the corresponding <em>V</em>^E and <em>H</em>^E data evaluated for these mixtures by the more involved non-electrolyte associated solution model approach. Page(s): 942-946 1993-11-01T00:00:00Z