Crystal structure of bis­[trans-di­chlorido­bis(propane-1,3-di­amine-κ2N,N′)chromium(III)] dichromate from synchrotron data

Acta Crystallographica Section E: Crystallographic Communications

Choi, J.-H.¹  Ryoo, K.S.¹  Moon, D.² 

[1] Department of Chemistry, Andong National University, Andong 36729, Republic of Korea;Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea

关键词: CRYSTAL STRUCTURE;    PROPANE-1;    3-DIAMINE;    CHLORIDE LIGAND;    TRANS-ANTI CONFORMATION;    CHROMIUM(III) COMPLEX;    DICHROMATE ANION;    HYDROGEN BONDING;    SYNCHROTRON RADIATION;   

DOI  :  10.1107/S2056989016012755

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The structure of the title compound, [CrCl2(tn)2]2[Cr2O7] (tn = propane-1,3-di­amine; C3H10N2), has been determined from synchrotron data. The asymmetric unit contains one CrIII complex cation and half a [Cr2O7]2− anion. In the complex cation, the CrIII ion is coordinated by the four N atoms of two propane-1,3-di­amine (tn) ligands in the equatorial plane and by two Cl atoms in a trans configuration, displaying a distorted octa­hedral coordination sphere. The two six-membered rings in the complex cation have an anti chair–chair conformation with respect to each other. The mean Cr—N(tn) and Cr—Cl bond lengths are 2.09 (1) and 2.320 (2) Å, respectively. The slightly bent dichromate anion is disordered over two sets of sites (occupancy ratio = 0.7:0.3) and has a staggered conformation. The crystal structure is stabilized by inter­molecular hydrogen bonds involving the NH2 groups of the tn ligands as donors and the O atoms of the [Cr2O7]2− anion and chlorido ligands as acceptors.

【 授权许可】

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