http://nopr.niscpr.res.in/handle/123456789/43699 2026-10-09T14:20:32Z http://nopr.niscpr.res.in/handle/123456789/43756 Title: One-step synthesis of a new fluoroboro-capped dinuclear iron(II) clathrochelate derived from 2,3-butanedioneazinedioxime and boron trifluoride Authors: Bhattacharya, U; Pujapanda, P K; Rout, A K; Sahoo, B Abstract: A new dinuclear iron(II) encapsulated complex has been isolated by an <em>in situ </em> reaction of iron(II) 2, 3-butanedioneazinedioxime and boron trifluoride in butanol medium. It has been characterised by spectral studies. Page(s): 91 1993-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/43755 Title: Unusual LEED patterns from mica surfaces Authors: Bhattacharyya, Krishna G Abstract: An air-cleaved mica surface does not yield any low energy electron diffraction (LEED) pattern. A surface cleaved in argon shows LEED patterns with beam energies of more than 70V. The patterns show unusual spot-splitting with different orientations an separations. The vacuum-cleaved surface produces diffuse spots with streaks which degenerate into triplets or triangles on prolonged heating of the sample. All patterns disappear after two or three days. Complex electrical fields at the mica surface have been found to be responsible for the unusual LEED patterns . Page(s): 92-95 1993-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/43754 Title: ¹¹⁹Sn, ³¹P and ¹⁴N NMR and other spectroscopic studies of trichlorostannato complexes of Ru(II) and Ru(III) Authors: Khan, Mirza M Taqui; Siddiqui, Md Rafiq H; Bajaj, Hari C Abstract: Chloro- and trichloro-stannato comlexes of ruthenium (II) and ruthenium (III) have been synthesised with bis{2-(diphenylphosphino)ethylamine (DPA) and bis{2-(diphenylphosphino)ethyl}benzyl amine (DPBA) as the primary ligand and PPh₃ or Me₂SO as the secondary ligand. The complexes, characterised by IR Raman, ¹H, ¹⁴N, ³¹p and ¹¹⁹Sn PMR and UV-vis spectroscopy, have a distorted octahedral geometry. The δ Sn values in ruthenium complexes are in the range 118-200 ppm and are much downfield as compared to those in Ir(III)-SnCl₃  complexes. The SnCI<img src='/image/spc_char/3_bar.gif' border=0> group exercises <em>trans</em> effect with respect 10 the <em>trans </em> group (N, Cl, P or S) and <em>cis </em> effect with respect to the groups in the <em>cis </em> position. The ²<em>J</em>(Sn-P) coupling in ruthenium complexes is much smaller than that in Ir(III) and Pt(II) complexes. Page(s): 96-107 1993-02-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/43753 Title: Copper(II) complexes of (salicylidene)amino acid schiff bases as models: Peroxidase and catalase Authors: Nath, Mala; Kamaluddin; Cheema, Jasleen Abstract: Activity of copper(II) complexes of (salicylidene)amino acid Schiff bases have been tested towards the decomposition of hydrogen peroxide at 40° and over a wide range of <em>p</em>H 6.0-11.0. Detailed kinetic investigations for the disproportionation of hydrogen peroxide catalysed by the complexes of the general formula, Cu[(sal:aa)H₂O] nH₂O (where sal:aa = salicylideneamino acid schiff base derived from the condensation of salicylaldehyde and glycine/<img src='http://www.niscair.res.in/jinfo/small.gif' border=0>– valine/<img src='http://www.niscair.res.in/jinfo/small.gif' border=0>-methionine; n =0 or 2) at 40°C and at <em>p</em>H 9.0 are discussed. The decomposition of hydrogen peroxide catalysed by the above complexes conforms to Michaelis-Menten type kinetics. Page(s): 108-113 1993-02-01T00:00:00Z