Two Tetrachlorocobaltate(II) Salts With Substituted Benzyl Triphenylphosphonium: Syntheses, Crystal Structures, Weak Interactions, and Magnetic Properties

Abstract

Two new tetrachlorocobaltate(II) salts, [BzTPP]2[CoCl4]·H2O (1) and [4NO2BzTPP]2[CoCl4]·H2O (2) ([BzTPP]+ = 1-benzyl- triphenylphosphonium; [4NO2BzTPP]+ = 1-(4′-nitrobenzyl)tri- phenylphosphonium), have been prepared and characterized by elemental analysis, IR, MS, single-crystal X-ray diffraction, and magnetic susceptibility. Both 1 and 2 crystallize in the monoclinic space group P21/c. The [CoCl4]2− anion exhibits a distorted tetrahedral coordination geometry. The C-H···Cl, C-H···O, and C-H···π hydrogen bonds in 1 and 2 give rise to a 3D hydrogen-bonded network structure. Magnetic susceptibility measurements in the temperature range 2–300 K show that both 1 and 2 exhibit an antiferromagnetic coupling behavior.