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A new series of diorganotin complexes of the type R 2 SnL (L 1 : N-(2-hydroxy-5-chlorophenyl

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IIIa) were prepared by the reaction of diphenyltin dichloride on the corresponding Schiff bases. The Schiff bases were the reaction products of 2-hydroxy-4-nitroaniline and appropriate salicylaldehydes. All the compounds were characterized by elemental analysis, 1 H-NMR, 13 C-NMR, IR and mass spectroscopy. Compound IIIa was also characterized by single crystal X-ray diffraction and shows a C 2 NO 2 coordination geometry nearly half-way between a trigonal bipyramidal and square pyramidal arrangement. In the solid state, π − π interactions exist between the aniline fragments of neighbouring molecules.

A series of new diphenyltin(IV) complexes of the type Ph2SnL (L1: N‐phenacyl‐5‐bromosalicylideneimine, Ph2SnL1; L2: N‐phenacyl‐3,5‐dichlorosalicylideneimine, Ph2SnL2; L3: N–phenacyl‐4‐methoxysalicylideneimine, Ph2SnL3) were synthesized and characterized by elemental analysis, IR, 1H, 13C, 119Sn NMR spectroscopy and mass spectrometry techniques. The C―Sn―C angles in the complexes were calculated using equations with the 1J(117/119Sn―13C) values from 13C NMR spectra. The possible structures, NMR and electronic properties of the studied molecules were calculated through density functional theory and results compared with experimental data. All the complexes were found to be mildly active against several microorganisms and some fungi. Copyright © 2014 John Wiley & Sons, Ltd.

Raw coal, HCl-treated coal, and HCl-HF treated coal samples ZnCl 2 , NiCl 2 , CoCl 2 , CuCl 2 , and Fe 2 O 3 ‚SO 4 as catalysts were pyrolyzed under various temperature and time conditions in an inert atmosphere. The conversion of organic matter was calculated. The change in the aliphatic hydrogen and the degree of aromatic condensation by FTIR technique have been examined a function of temperature, time, and catalyst type. The volumetric swelling ratio of the chars obtained in different experimental conditions have been measured using the pyridine swelling technique, and the extent of cross-linking in the macromolecular network of chars was examined. It was found that the cross-linking increased with the catalysts.

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