Lieberman Craig M, Filatov Alexander S, Vreshch Volodimir D, Dikarev Evgeny V
Department of Chemistry, University at Albany, Albany, NY 12222, USA.
Acta Crystallogr C. 2013 Dec 15;69(Pt 12):1427-30. doi: 10.1107/S0108270113025717. Epub 2013 Nov 8.
The crystal structure of a tin-rich heterometallic supramolecular product, [CuSn8(C5HF6O2)2(C5H2F6O4)4] or [Sn4(hfpt)2-Cu(hfac)2-Sn4(hfpt)2], (I), is reported (hfpt is the tetraanion of 1,1,1,5,5,5-hexafluoropentane-2,2,4,4-tetraol and hfac is the anion of 1,1,1,5,5,5-hexafluoropentane-2,4-dione). Reaction between tin(II) tetraolate, [Sn4(hfpt)2], and copper(II) β-diketonate, [Cu(hfac)2], was utilized for the preparation of (I). The asymmetric unit consists of the whole [Sn4(hfpt)2] unit and half of a [Cu(hfac)2] unit, with the Cu atom lying on an inversion center. Intermolecular Cu···O interactions from the axial positions of copper in [Cu(hfac)2] and O atoms of the hfpt ligand in [Sn4(hfpt)2] mediate the formation of a sandwich-type structure for (I). Additional intermolecular Sn···O interactions between neighbouring [Sn4(hfpt)2] units complete a two-dimensional network.
报道了一种富锡异金属超分子产物[CuSn8(C5HF6O2)2(C5H2F6O4)4]或[Sn4(hfpt)2-Cu(hfac)2-Sn4(hfpt)2]（I）的晶体结构（hfpt是1,1,1,5,5,5-六氟戊烷-2,2,4,4-四醇的四价阴离子，hfac是1,1,1,5,5,5-六氟戊烷-2,4-二酮的阴离子）。利用四醇锡（II）[Sn4(hfpt)2]与β-二酮铜（II）[Cu(hfac)2]之间的反应制备了（I）。不对称单元由整个[Sn4(hfpt)2]单元和半个[Cu(hfac)2]单元组成，Cu原子位于对称中心。[Cu(hfac)2]中铜轴向位置的分子间Cu···O相互作用与[Sn4(hfpt)2]中hfpt配体的O原子介导了（I）的夹心型结构的形成。相邻[Sn4(hfpt)2]单元之间额外的分子间Sn···O相互作用形成了二维网络。
