Eder Felix, Weil Matthias
Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, TU Wien, Getreidemarkt 9/164-SC, A-1060, Vienna, Austria.
Acta Crystallogr E Crystallogr Commun. 2021 Apr 27;77(Pt 5):555-558. doi: 10.1107/S2056989021004333. eCollection 2021 May 1.
Single crystals of Zn(HTeO)(AsO), dizinc(II) hydroxidodioxidotellurate(IV) oxidoarsenate(V), were obtained as one of the by-products in a hydro-thermal reaction between Zn(NO)·6HO, TeO, HAsO and NH in molar ratios of 2:1:2:10 at 483 K for seven days. The asymmetric unit of Zn(HTeO)(AsO) contains one Te (site symmetry ), one As (), one Zn (1), five O (three , two 1) and one H () site. The Zn atom exhibits a coordination number of 5 and is coordinated by four oxygen atoms and a hydroxide group, forming a distorted trigonal bipyramid. The hydroxide ion is positioned at a significantly larger distance on one of the axial positions of the bipyramid. The [ZnOOH] polyhedra are connected to each other by corner-sharing to form [ZnO(OH)O] layers extending parallel to (001). The Te atom is coordinated by three oxygen atoms and a hydroxide group in a one-sided manner in the shape of a bis-phenoid, revealing stereochemical activity of its 5 electron lone pair. The As atom is coordinated by four oxygen atoms to form the tetra-hedral oxidoarsenate(V) anion. By corner-sharing, [TeOOH] and [AsO] groups link adjacent [ZnO(OH)O] layers along [001] into a three-dimensional framework structure.
Zn(HTeO)(AsO)（二锌（II）氢氧根二氧代碲酸（IV）氧化砷酸（V））单晶是在483 K下，将摩尔比为2:1:2:10的Zn(NO)·6HO、TeO、HAsO和NH进行水热反应7天后得到的副产物之一。Zn(HTeO)(AsO)的不对称单元包含一个Te（位点对称性 ）、一个As（ ）、一个Zn（1）、五个O（三个 ，两个1）和一个H（ ）位点。Zn原子的配位数为5，由四个氧原子和一个氢氧根基团配位，形成一个扭曲的三角双锥。氢氧根离子位于双锥一个轴向位置上明显更大的距离处。[ZnOOH]多面体通过角共享相互连接，形成平行于(001)延伸的[ZnO(OH)O]层。Te原子由三个氧原子和一个氢氧根基团以双侧方式配位，呈双楔状，显示出其5 电子孤对的立体化学活性。As原子由四个氧原子配位，形成四面体氧化砷酸（V）阴离子。通过角共享，[TeOOH]和[AsO]基团沿着[001]将相邻的[ZnO(OH)O]层连接成三维骨架结构。
