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Sarr M.,Laboratoire Of Chimie Minerale Et Analytique Lachimia | Diasse-Sarr A.,Laboratoire Of Chimie Minerale Et Analytique Lachimia | Diop L.,Laboratoire Of Chimie Minerale Et Analytique Lachimia | Plasseraud L.,CNRS Molecular Chemistry Institute of Burgundy University | And 2 more authors.
Acta Crystallographica Section E: Structure Reports Online | Year: 2015

Reaction of oxalic acid and diphenyltin dichloride in the presence of cyclohexylamine led to the formation of the title salt, (C6H14N)2[Sn(C6H5)2(C2O4)2]. The dianion is made up from an Sn(C6H5)2 moiety cis-coordinated by two chelating oxalate anions, leading to an overall distorted octahedral coordination geometry of the SnIV atom. The negative charges are compensated by two surrounding cyclohexylammonium cations adopting chair conformations each. In the crystal, anions and cations are linked via a network of N - H⋯O hydrogen bonds into a layered arrangement parallel to (101). Source


Diallo W.,Laboratoire Of Chimie Minerale Et Analytique Lachimia | Gueye N.,Laboratoire Of Chimie Minerale Et Analytique Lachimia | Crochet A.,University of Fribourg | Plasseraud L.,CNRS Molecular Chemistry Institute of Burgundy University | And 2 more authors.
Acta Crystallographica Section E: Structure Reports Online | Year: 2015

Single crystals of the title salt, Me2NH2+·HC2O4-·0.5H2C2O4, were isolated as a side product from the reaction involving Me2NH, H2C2O4 and Sn(n-Bu)3Cl in a 1:2 ratio in methanol or by the reaction of the (Me2NH2)2C2O4 salt and Sn(CH3)3Cl in a 2:1 ratio in ethanol. The asymmetric unit comprises a dimethylammonium cation (Me2NH2+), an hydrogenoxalate anion (HC2O4-), and half a molecule of oxalic acid (H2C2O4) situated about an inversion center. From a supramolecular point of view, the three components interact together via hydrogen bonding. The Me2NH2+ cations and the HC2O4- anions are in close proximity through bifurcated N - H⋯(O,O) hydrogen bonds, while the HC2O4-anions are organized into infinite chains via O - H⋯O hydrogen bonds, propagating along the a-axis direction. In addition, the oxalic acid (H2C2O4) molecules play the role of connectors between these chains. Both the carbonyl and hydroxyl groups of each diacid are involved in four intermolecular interactions with two Me2NH2+ and two HC2O4- ions of four distinct polymeric chains, via two N - H⋯O and two O - H⋯O hydrogen bonds, respectively. The resulting molecular assembly can be viewed as a two-dimensional bilayer-like arrangement lying parallel to (010), and reinforced by a C - H⋯O hydrogen bond. Source

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