A n e w titanium(ii1) mediated [(C5H5)2TiCl] reduction of 2,3-epoxy alcohols to alk-1-en-3-01s is described.Transition metal mediated reactions provide new dimensions for selectivity in organic synthesis. On examining the titanium(m) induced homolysisl.2 of the C-0 bond of 2,3-epoxy alcohol (1) with the possibility of enhancing its utility, we observed remarkable regioselectivity ; deoxygenation of (1) occurred exclusively from the least substituted carbon end to produce terminal alkenic alcohol (2) [equation (l)] in high yield.The high regioselectivity observed may be due to the participation of the hydroxy group in the transition state. Accordingly, a workable mechanism has been postulated for the deoxygenation of 2,3-epoxy alcohols with (CsH5)2TiC1, which is depicted in Scheme 1. The initial step is the formation of TiI*I-alkoxide (3) and HC1 which consumes a stoicheiometric amount of (C5H5)2TiCl. Compound (3) reacts in the usual way3.4 with (C5HS)zTiCl to produce the radical (4) which subsequently participates intramolecularly with the unfilled d-orbital of Ti111 to-form (S), an intermediate proposed by

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This article describes a study on thermal behavior of poly(vinylidene fluoride-chlorotrifluoroetheylene) [poly(VDF-CTFE)] copolymers as polymeric binders of specific interest for high energy materials (HEMs) composites by thermal analytical techniques. The non-isothermal thermogravimetry (TG) for poly (VDF-CTFE) copolymers was recorded in air and N 2 atmospheres. The results of TG thermograms show that poly(VDF-CTFE) copolymers get degrade at lower temperature when in air than in N 2 atmosphere. In the derivative curve, there was single maximum degradation peak (T max ) indicating one-stage degradation of poly(VDF-CTFE) copolymers for all the samples. The other thermal properties such as glass transition temperature (T g ) and degradation temperature (T d ) for poly(VDF-CTFE) copolymers were measured by employing differential scanning calorimeter (DSC) technique. The kinetic parameters related to thermal degradation of poly(VDF-CTFE) copolymers were investigated through non-isothermal Kissinger kinetic method using DSC method. The activation energies for thermal degradation of poly(VDF-CTFE) copolymers were found in a range of 218-278 kJ/mol.