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

Abstract

Two new salts containing tetrachlorocobaltate(II) anion, [4FBz TPP]₂[CoCl₄](1) and [4ClBzTPP]₂[CoCl₄]·3H₂O(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 P2₁/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···Cl, O‒H···Cl, and O‒H···O hydrogen bonds, p···π and π···π interactions, or O···O and Cl···O in 1 and 2 consolidate the crystal packing and give further rise to a 3D network structure.

Keywords:

• Crystal structures
• substituted benzyl triphenylphosphonium
• tetrachlorocobaltate(II)
• weak interactions

Acknowledgments

This work has been partially supported by the Science and Technology Project (No. 2011B080701026, 2012B010200041) from Guangdong Science and Technology Department, the Undergraduates’ Innovative Experimental Program in University from Department of Education of Guangdong province (No. 1056412056) and the key Academic Program of the 3rd phase “211 Project” of South China Agricultural University (No. 2009B010100001).