A new polymorph of (O-ethyl dithiocarbonato-kappa2S,S')bis(triphenylphosphine-kappaP)silver(I).
A new triclinic polymorphic modification of the title compound, [Ag(C(3)H(5)OS(2))(C(18)H(15)P)(2)], has been found and compared with the previously known orthorhombic modification [Tiekink (1988). Coord. Chem. 17, 239-243]. The two polymorphs have the same molecular shape, viz. a distorted tetrahedral geometry, with a chelating dithiocarbonate (xanthate) and two PPh(3) ligands bonded to the Ag atom. However, in this new polymorph, the xanthate ligand is bonded asymmetrically to the Ag atom, with Ag-S distances of 2.5489 (6) and 2.8055 (7) A, while for the orthorhombic polymorph these distances are 2.686 (4) and 2.601 (4) A. The Ag-P distances are similar in both structures.
Ara
Irene
I
Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain. irene.ara@posta.unizar.es
El Bahij
Fatima
F
Lachkar
Mohamed
M
Ben Larbi
Najib
N