http://nopr.niscpr.res.in/handle/123456789/44009 2026-10-09T13:06:23Z http://nopr.niscpr.res.in/handle/123456789/44091 Title: Homolytic displacement at saturated carbon: Part 7^†-Synthesis of cyclic, bicyclic and spirocyclic sulphones from the corresponding butenyl cobaloximes with thiophene- 2-sulphonyl chloride Authors: Gupta, B D; Das, Indira; Dixit, Vandana Abstract: The reactions of but-3-enyl cobaloximes with thiophene-2-sulphonyl chloride under thermal and photochemical conditions give the corresponding cyclopropylmethyl sulphones. A similar reaction with cyclopent-2-enylmethyl and cyclohex-2-enylmethyl cobaloximes gives a mixture of <em>cis- </em> and <em>trans- </em> bicyclic products. Cycloalkane, spirocycloprop-2-yl sulphone is formed exclusively from the reaction of 2-(cycloalk-1-enyl)ethyl cobaloxime. The reactions are interpreted in terms of <em>S</em>_H 2 mechanism. Page(s): 1019-1022 1993-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44090 Title: Synthesis and curing of bis[4(3'-ethynyl phenyl amino)- 3-nitrophenyl]sulphone Authors: Dutta, Pradip K; Maiti, Sukumar Abstract: A new acetylene terminated nitrophenyl sulphone (ATNPS) has been synthesized by nucleophilic displacement reaction between bis(4-chloro-3-nitrophenyl)sulphone and 3-ethynyl aniline. ATNPS is characterized by elemental analysis, IR and ¹H-NMR spectroscopies. On heating at ca. 250ᵒC or above ATNPS becomes cross linked due to the presence of the acetylenic end group. The thermal behavior has been studied by DSC and DTA techniques. The kinetic study of the curing has been carried out by both differential and integral methods by use of a computational programming. Page(s): 1023-1028 1993-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44089 Title: Synthesis of soluble phthalocyanines and study of their aggregation behavior in solution Authors: Shankar, Rama; Jha, N K; Vasudevan, P Abstract: Aryloxy substituted soluble phthalocyanine (pc) and its metal complexes (MPcX₄,X=4-ethylphenoxy, M=2H, Cu, Ni, Zn, Fe, Co) have been synthesized and characterized by elemental analysis, ¹H NMR, UV-visible and IR spectroscopy. Degree of association in toluene solution has been measured by molecular weight determination using vapour pressure osmometry. Association and its relative order have also been established in these complexes by UV-visible spectral studies. Page(s): 1029-1033 1993-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/44088 Title: Synthesis and characterization of hydridocarbonylbis(triphenylphosphine) ruthenium(II) dialkyldithiophosphates Authors: Jain, VimaI K Abstract: Complexes of the type [RuH{SSP(OR)₂}(CO(PPh₃)₂] (R = Et, Pr<em>ⁿ</em>, Pr<em>ⁱ</em>, Bu<em>ⁿ</em>, Bu<em>ⁱ</em>, Bu<em>^s</em>) have been prepared by the reaction of [RuHCI(CO)(PPh₃)₃with ammonium salt of the dialkyldithiophosphoric acid. These complexes have been characterized by elemental analyses and IR and NMR (¹H and ³¹P) data. The ¹H NMR data indicate the phosphine ligands are <em>cis </em>to hydride. Page(s): 1034-1036 1993-12-01T00:00:00Z