Schmidt Benjamin, Schröder Benjamin, Sonnenberg Karsten, Steinhauer Simon, Riedel Sebastian
Fachbereich Biologie, Chemie, Pharmazie, Institut für Chemie und Biochemie-Anorganische Chemie, FU Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany.
Angew Chem Int Ed Engl. 2019 Jul 22;58(30):10340-10344. doi: 10.1002/anie.201903539. Epub 2019 Jul 11.
Pseudohalogens are defined as molecular entities that resemble the halogens in their chemistry. While our understanding of polyhalogen chemistry has increased over the last years, research on polypseudohalogen compounds is lacking. The pseudohalogen BrCN possesses a highly pronounced σ-hole at the bromine side of the molecule, inducing strong halogen bonding. This allows the synthesis and characterization of new polypseudohalogen anions, as shown by the single-crystal X-ray diffraction of [PNP][Br(BrCN)] and [PNP][Br(BrCN) ]. Both the nearly linear anion [Br(BrCN)] and the distorted pyramidal anion [Br(BrCN) ] were characterized by Raman spectroscopy and quantum-chemical calculations. The behavior of the polypseudohalogen compounds in solution and as room-temperature ionic liquids (RT-ILs) using the [NBu ] cation was studied by C and N NMR spectroscopy. These types of ILs are capable of dissolving elemental gold and offer themselves as promising compounds in metal recycling.
拟卤素被定义为在化学性质上类似于卤素的分子实体。尽管在过去几年里我们对多卤化物化学的理解有所增加，但对多拟卤化物化合物的研究却很匮乏。拟卤素溴氰在分子的溴侧具有高度明显的σ-空穴，可诱导强烈的卤键。这使得新的多拟卤化物阴离子的合成和表征成为可能，如[PNP][Br(BrCN)]和[PNP][Br(BrCN)]的单晶X射线衍射所示。近线性阴离子[Br(BrCN)]和扭曲的金字塔形阴离子[Br(BrCN)]均通过拉曼光谱和量子化学计算进行了表征。使用[NBu]阳离子研究了多拟卤化物化合物在溶液中以及作为室温离子液体（RT-ILs）的行为，通过碳-13和氮-15核磁共振光谱进行了研究。这些类型的离子液体能够溶解元素金，并有望成为金属回收中有前景的化合物。
