Syntheses, Characterization, and Crystal Structures of Two Tetrachlorocobaltate(II) Salts With 4-Substituted Benzyl Triphenylphosphonium

Two new salts containing tetrachlorocobaltate(II) anion, [4FBz TPP](2)[CoCl4](1) and [4ClBzTPP](2)[CoCl4]center dot 3H(2)O(2) ([4FBzTPP](+) = 1-(4'-flurobenzyl)triphenylphosphonium; [4ClBzTPP](+) = 1-(4'-chlorobenzyl)triphenylphosphonium), have been prepared and characterized by elemental analysis, IR, UV-Vis, ESI-MS, molar conductivity, and single-crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic system with space group P2(1)/c, whereas 2 crystallizes in the triclinic system with space group P-1. The [CoCl4](2-) anion in two salts exhibits a distorted tetrahedral coordination geometry. The C-H center dot center dot center dot Cl, O-H center dot center dot center dot Cl, and O-H center dot center dot center dot O hydrogen bonds, p center dot center dot center dot pi and pi center dot center dot center dot pi interactions, or O center dot center dot center dot O and Cl center dot center dot center dot O in 1 and 2 consolidate the crystal packing and give further rise to a 3D network structure.