http://nopr.niscpr.res.in/handle/123456789/39817 2026-10-09T15:23:52Z http://nopr.niscpr.res.in/handle/123456789/39908 Title: Synthesis and characterization of <em>trans</em>-[OsBr₄(SMe₂)₂]<em>: </em>The first monothioether complex of osmium (IV) Authors: Pramanik, Kausikisankar; Ghosh, Prasanta; Chakravorty, Animesh Abstract: The title complex has been synthesized in excellent yield by oxidizing mer-[OSBr₃(SMe₂)₃] with excess bromine in benzene at room temperature. Its geometry is characterized by X-ray crystallography. The Os^IV/Os^lll reduction potential is 0.45 V vs. SCE. Page(s): 95-96 1998-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/39907 Title: Kirkwood-Buff parameters for the binary mixtures and determination of partial structure factor in the long wavelength limit Authors: Guha, A; Ghosh, N K Abstract: Kirkwood-Buff parameters for some toluene containing binary mixtures have been calculated with the help of thermodynamic quantities like partial molar volume, isothermal compressibility, etc. These parameters are used to show that spatial correlations of like molecules are preferred over correlations of unlike molecules and vice-versa in the mixtures. The results are compared with the help of partial structure factors determined primarily by the non-zero interaction between the components in the mixture and found to be satisfactory. Partial molar volumes and isothermal compressibilities have been calculated from the hard sphere mixture theory. Page(s): 97-101 1998-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/39906 Title: Twisted intramolecular charge transfer of <em>p</em>-N,N- dimethylamino-benzaldehyde in cyclodextrin environments Authors: Kundu, Santi; Bera, Subhas Chandra; Chattopadhyay, Nitin Abstract: Twisted intramolecular charge transfer (TICT) of <em>p</em>-N.N- dimethylaminobenzaldehyde (DMABA) has been studied in different aqueous cyclodextrin (&alpha;-. &beta;- and &upsih;-) environments. The tluorophore forms 1:1 complexes with all the three cyclodextrins (CD). The TICT emission is extremely weak in pure water but it is enhanced as the probe is encapsulated within the cyclodextrin cavities. The relative enhancement of the emission from the TICT species to the locally excited (LE) species is maximum in the &alpha;-CD environment and minimum in the &upsih;-CD environment. This differential enhancement of the two emission bands in different aqueous CD solutions has been explained on the basis of the polarity factor. It has been suggested that the polarity of the microenvironment is the principal controlling factor for the TICT process. Page(s): 102-108 1998-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/39905 Title: Evaluation of excess isentropic compressibilities and viscosities of <em>n</em>-butoxyethanols with water at 298.15 K Authors: Pal, Amalendu Abstract: A number of approximations have been proposed to obtain the ideal contribution to excess isentropic compressibilities and viscosities. Page(s): 109-113 1998-02-01T00:00:00Z