2 ~∞ [Co{1,4-C _6H _4(CN) _2} _2{NTf _2} _2][SnI{Co(CO) _4} _3] _2 - A 2D coordination network with an intercalated carbonyl cluster

摘要

Dark red transparent crystals of [Co{1,4-C _6H _4(CN) _2} _2{NTf _2} _2][SnI{Co(CO) _4} _3] _2 are obtained by reacting SnI _4, Co _2(CO) _8 and 1,4-C _6H _4(CN) _2 in the ionic liquid [EMIm][NTf _2] (EMIm: 1-ethyl-3-methylimidazolium; NTf _2: bis(trifluoromethylsulfonyl)imide). According to X-ray structure analysis based on single crystals, the title compound crystallizes in a triclinic manner and contains the novel 2∞[Co{1,4-C _6H _4(CN) _2} _2{NTf _2} _2] coordination network. This infinite 2D network is composed of Co ~(2+) ions that are planarily interlinked by four 1,4-dicyanobenzene ligands. As a non-charged 2D network, Co ~(2+) is furthermore coordinated by two [NTf _2] ~- anions. The 2∞[Co{1,4-C _6H _4(CN) _2} _2{NTf _2} _2] layers are stacked on top of each other with SnI[Co(CO) _4] _3 molecules intercalated in distorted cubic gaps between the layers. The title compound is furthermore characterized by energy dispersive X-ray (EDX) analysis, thermogravimetry (TG), infrared spectroscopy (FT-IR) and optical spectroscopy (UV-Vis).