Hydrothermal Syntheses and Characterizations of Thioarsenates [Fe(phen)_3] [As_3S_6]_dien_7H_20 and [Mn_2(phen)_4(As_2S_5)]_ phen _ 2H_20: A New Coordination Mode of the As_2S_5~4-Anion

摘要

Novel hydrogen-bonded supramolecular thioarsenates [Fe(phen)_3][As_3S_6] _ dien _ 7H_20 (1) and [Mn_2(phen)_4(As_2S_5)] _ phen _2H_20 (2) (dien = diethylenetriamine, phen = 1,10-phenanthroline) were hydrothermally synthesized and characterized. The structure of 1 consists of [As_3S_6]~3--H_20 anionic layers and [Fe(phen)_3]~3+_dien cationic layers assembled via 0-H _ _ _ S and 0-H _ _ _ N hydrogen-bonding interactions. The layers stack alternately and are parallel to each other to give a 3D network structure with channels accommodating unique branched water chains, which are anchored on the anionic and cationic layers via hydrogen bonds. In 2, the [As_2S_5]~4-anion acts as a tetradentate brigding ligand via four terminal S atoms to link two [Mn(phen)_2]~2+ cations, forming the neutral complex [Mn_2(phen)_4(As_2S_5)]. This is a new coordination mode for the [As_2S_5]~4-ion. [Mn_2(phen)_4(As_2S_5)], phen, and H_20 form a 3D network structure via O-H _ _ _ S, 0-H _ _ .0, andπ-π stacking interactions.