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Diop T.,Cheikh Anta Diop University | Diop L.,Cheikh Anta Diop University | Molloy K.C.,University of Bath | Kociok-Kohn G.,University of Bath | Fall D.,Laboratoire Of Chimie Organique Et Therapeutique
Main Group Metal Chemistry | Year: 2012

The title compound, [(CH3)2CH]2NH 2+·[(PhPO3H)2SnPh3]-, has been synthesised and its structure determined by spectroscopies (IR, RMN and Mössbauer) and single crystal X-ray crystallography. The Mössbauer spectroscopy data for the title compound (QS = 3.50 mm s-1 ) are in accordance with the trans O2SnC3 geometry at tin atom. The SnPh3 residue is axially coordinated by two monodentate [PhPO 3H]- anions, leading to a trigonal-bipyramidal geometry around the tin atom. The anions [(PhPO3H)2SnPh3]- are linked by pairs of O-H⋯O interaction, forming an infinite chain. In the crystal, neighbouring chains are linked by hydrogen bonds N-H⋯O via the cation [(CH3)2CH]2NH2+ forming a three-dimensional network. © 2012 by Walter de Gruyter • Berlin • Boston. Source


Diop T.,Cheikh Anta Diop University | Diop L.,Cheikh Anta Diop University | Da Silva J.G.,Federal University of Minas Gerais | Fall D.,Laboratoire Of Chimie Organique Et Therapeutique
Main Group Metal Chemistry | Year: 2012

The title compound Bu 2NH 2(PhPO 3H) 2SnMe 3 was synthesized and its structure determined by single crystal X-ray crystallography. The structure consists of two monodentate hydrogenophosphonates [PhPO 3H] - bonded to SnMe 3 groups leading to SnC 3O 2 moiety in a trans trigonal bipyramidal environment. [(PhPO 3H) 2SnMe 3] - dimerizes through hydrogen bonds. Dibutylammonium (Bu 2NH 2 +) cations are hydrogen bonded to the dimeric moieties through phosphonates to give a chain structure. © 2012 by Walter de Gruyter Berlin Boston. Source


Pacquelet S.,Laboratoire Of Chimie Organique Et Therapeutique | Blache Y.,University of Toulon | Kimny T.,Laboratoire Of Chimie Organique Et Therapeutique | Dubois M.-A.L.,Laboratoire Of Chimie Organique Et Therapeutique | Desbois N.,Institut Universitaire de France
Synthetic Communications | Year: 2013

A general method for the preparation of various substituted dihydropyrano [3,4-b]pyridines is reported. The formation of pyranopyridine structure was achieved by a Polonovski rearrangement of pyridine N-oxide with acetic anhydride, giving 2-(acetoxymethyl)-pyridine followed by an hydrolyzed and an intramolecular Williamson ether formation. © 2013 Copyright Taylor and Francis Group, LLC. Source

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